Tuesday, October 12, 2010

October 12: ORD

Today is October 12th. It's the 285th day of the year. 80 days remain. It's week 41 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 31-year averages at 64 and 43.


On the warm side, two years ago the high was the co-record high of 84 with a low of 57. The other co-record high of 84 was set in 1960. In 1997 the high was 82 with a low of 58. Two years earlier, in 1995, the high was 83 with a low of 55. Another warm high was 76 in 1985. Another warm low was 55 in 2005.
The record warmest low of 67 occurred back in 1928. Over the last 31 years, 25 highs (81%) have been: 50s (6), 60s (11) and 70s (8). Three highs were in the warmer 80s. Three highs were in the cooler: 30s (1) and 40s (2). The most recent 40s high was last year's 48. Five of the 70s highs occurred within a seven year span from 1996 to 2002. The year prior to this span (1995) and the year following it's start (1997) were host to highs in the 80s. The lone 30s high of 39 happened in 2006. This was the year that the earliest measurable snow occurred. An inch fell here in Crystal Lake and in neighboring Algonquin. An inch and a half fell at Arlington Heights. Both O'Hare and Midway airports received three tenths of an inch. The suburb of DeKalb had half an inch. October 12, 2006 beat October 18 in 1972 and 1989, the previous earliest dates for snow.

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1976 the high was 79 with a low of 57, a warm day. In 1975 the high was a warm 76 with a low of 41, a 35 degree spread. In 1973 the high was 74 with a warm low of 61, a warm day. In 1971 the high was 70 with a low of 39, a 31 degree spread. In 1969 the high was 61 with a low of 54, a seven degree spread. In 1968 the high was 75 with a low of 44, a 31 degree spread. In 1967 the high was 63 with a cold low of 28, a 35 degree spread. In 1966 the high was 65 with a cold low of 31, a 34 degree spread. In 1962 the high was a warm 76 degrees. In 1961 the high was a warm 78 with a low of 45, a 33 degree spread. In 1960 the high was a warm 82 with a low of 53, a
warm day. 1960 was also the year of the co-record high of 84 at Midway.

More recently, there were
large spreads of 32 degrees in 1990 (64/32), 32 degrees in 1994 (67/35), 31 degrees in 1987 (59/28) and 30 degrees in 2000 (73/43). There was a small spread of seven degrees last year (48/41).

On the cool side, in 2006 the high was 39 with a low of 30. In 1988 the high was 48 with the co-record low of 28. In 1980 the high was 53 with a low of 31. Other cool highs were 48 last year and 51 in 1979. Another cool low was the co-record low of 28 in 1987. The record coolest high of 38 occurred back in 1917. 29 of the last 31 lows (94%) were: 30s (8), 40s (13) and 50s (8). Two lows were in the cooler 20s.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:34 and sunrise is at 7:03. Sunset is at 18:16 and twilight ends at 18:44. There's a total of 11 hours, 13 minutes of daylight today and 12 hours, 10 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:36 and sunrise is at 7:04. The moon is waxing crescent. Illumination was 24% at midnight, will be 29% at noon and 34% at midnight tonight. Moonrise is at 12:41 this afternoon. Moonset is at 21:47 tonight. Moonrise is at 13:29 tomorrow afternoon. Moonlight time is 9 hours, 6 minutes which is the same as yesterday.

United Nation's Day is in 12 days. -Bernie-

Monday, October 11, 2010

October 11: ORD

Today is October 11th. It's the 284th day of the year. 81 days remain. It's week 41 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 65 and the normal low is 44. I've calculated the 31-year averages at 64 and 42.


On the warm side, in 2003 the high was 78 with a low of 54. Other warm highs were 79 in: 1989, 1995 and two years ago. The record high of 87 was set back in 1928.
The record warmest low of 66 occurred in 1973. Over the last 31 years, 22 highs (71%) have been: 50s (10) and 60s (12). Eight highs were in the warmer 70s and one high (last year's 44) was in the cooler 40s. No highs have been in the 80s; that is, until today.

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1977 the high was a cool 51. In 1976 the high was 71 with a low of 41, a 30 degree spread. in 1975 the high was 66 with a low of 36, a 30 degree spread. In 1974 the high was 76 with a low of 45, a 31 degree spread. In 1973 the high was 82 with a low of 66, a warm day and year of the record warmest low. In 1967 the high was 47 with a low of 30, a cool day. In 1966 the high was 67 with a low of 37, a 30 degree spread. In 1964 the high was 56 with a cold low of 24 (cooler than the record low), a cool day. In 1962 the high was 88 with a low of 65, a hot day. That high of 88 was warmer than the record high. In 1961 the high was a warm 77 with a low of 55, a warm day. In 1960 the high was a warm 80 with a low of 53, a
warm day. In 1959 the high was a cool 50 degrees.

More recently, there was a
large spread of 40 degrees in 1989 (79/39), 33 degrees in 1995 (79/46) and 31 degrees in 1997 (76/45). There was a small spread of five degrees in 2005 (60/55).

On the cool side, last year the high was 44 with a low of 29. In 1987 the high was 50 with a low of 29. In 1996 the high was 57 with the record-tying low of 27 (up until last year, our most recent 20s low). The record low of 27 also occurred in 1906. In 1988 the high was 51 with a low of 33. The other cool lows were 32 in both 1990 and 1993. The record coolest high of 41 occurred way back in 1875. 14 of the last 31 lows were 40s. 11 lows were in the cooler: 20s (3) and 30s (8). Six lows were in the warmer 50s.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:33 and sunrise is at 7:01. Sunset is at 18:18 and twilight ends at 18:46. There's a total of 11 hours, 17 minutes of daylight today and 12 hours, 13 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:34 and sunrise is at 7:03. The moon is waxing crescent. Illumination was 16% at midnight, will be 20% at noon and 24% at midnight tonight. Moonrise is at 11:44 this morning. Moonset is at 20:50 tonight. Moonrise is at 12:41 tomorrow afternoon. Moonlight time is 9 hours, 6 minutes which is 14 minutes shorter than yesterday.

Columbus Day is today and United Nation's Day is in 13 days. -Bernie-

Sunday, October 10, 2010

October 10: ORD

Today is October 10th. It's the 283rd day of the year. 82 days remain. It's week 41 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 65 and the normal low is 44. I've calculated the 31-year averages at 62 and 42.


On the warm side, there were no days of a mean of at least 11.5 degrees above normal. The warmest highs were in the upper 70s (79 in 1999 and 77 in 2003). The record high was 86 in 1962 (at Midway). The
warm low was 56 in 1984. The record warmest low of 68 occurred way back in 1879. Over the last 31 years, 22 highs (71%) have been: 50s (8) and 60s (14). There were five highs in the warmer 70s and four highs in the cooler 40s, including last year's high of 48. Last year was the coolest October 10 of the last 31 years. The last 31 years have not produced a high of 80 or higher. That will likely change today as the predicted high is 85 in Crystal Lake and at least 84 at O'Hare. Today will rival 1961 (80 degrees), 1962 (87 degrees), 1963 (82 degrees) and 1973 (81 degrees) as O'Hare's warmest October 10th ever.

Yesterday's high of 86 at O'Hare at 4:36 PM tied the old record high for Chicago which was set in 1949 at Midway. Rockford hit 90 at 3:24 PM, shattering their old record of 84, set in 1920. Midway hit 87, breaking their own record (in 1949). The lows were 55 at O'Hare, 53 at Rockford and 56 at Midway. West Chicago hit 88 degrees after a low of 50. The National Weather Service in Romeoville reported a high of 88 after a low of 52. Aurora had a high of 89 after a low of 47. Others: DeKalb: 86/53, Joliet: 90/48 and Kankakee: 90/46. The spreads (difference between the high and low temperatures) were large because the air mass was very dry. Chicago's lakefront was a lot cooler, having attained a high of 78 after a low of 63.


In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1978 the high was 62 with a low of 55, a seven degree spread. In 1974 the high was 70 with a low of 38, a 32 degree spread. In 1973 the high was 81 with a low of 65, a warm day. In 1967 the high was a cool 51 with a low of 36, a cool day. In 1964 the high was 48 with a low of 20 (cooler than the record low and year of the record low), a cold day. In 1963 the high was a warm 82 with a low of 50, a 32 degree spread. In 1962 the high was a hot 87 with a low of 43, a 44 degree spread. 1962 was the year of the record high (see above). In 1961 the high was 80 with a low of 60, a warm day. In 1960 the high was a warm 79 with a low of 47, a 32 degree spread.


More recently, there was a
large spread of 30 degrees two years ago (72/42). There were small spreads of six degrees in 2006 (58/52) and seven degrees three years ago (54/47).

On the cool side, last year the high was 48 with a low of 31. In 1996 the high was 50 with a low of 31. In 1990 the high was 48 with a low of 34. In 1993 the high was 53 with a low of 30. In 1987 the high was 48 with a low of 37. In 1985 the high was 47 with a low of 39. The record low of 27 was set in 1964. The record coolest high of 39 occurred way back in 1906. 25 of the last 31 lows (81%) were: 30s (12) and 40s (13). Six lows were in the warmer 50s.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:32 and sunrise is at 7:00. Sunset is at 18:20 and twilight ends at 18:48. There's a total of 11 hours, 20 minutes of daylight today and 12 hours, 16 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:33 and sunrise is at 7:01. The moon is waxing crescent. Illumination was 9% at midnight, will be 12% at noon and 16% at midnight tonight. Moonrise is at 10:38 this morning. Moonset is at 19:58 tonight. Moonrise is at 11:44 tomorrow morning. Moonlight time is 9 hours, 20 minutes which is 28 minutes shorter than yesterday.

Columbus Day is tomorrow and United Nation's Day is in 14 days. -Bernie-

Saturday, October 9, 2010

October 9: ORD

Today is October 9th. It's the 282nd day of the year. 83 days remain. It's week 41 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 65 and the normal low is 45. I've calculated the 31-year averages at 63 and 44.


On the warm side, there were no days of a mean of at least 11.5 degrees above normal. The warmest highs were in the mid 70s (76 three years ago and 75 in 1997). The record high is 86, set in 1949 (at Midway). The
warm lows were 57 in: 1982 and 1984. The record warmest low of 68 occurred way back in 1879. Over the last 31 years, 29 highs (94%) have been: 50s (10), 60s (11) and 70s (8). There were two highs in the cooler 40s. The last 31 years have not produced a high of 80 or higher. That will likely change today as the predicted high is 84 in Crystal Lake and at least 82 at O'Hare. Today will rival 1961 (80 degrees), 1966 (83 degrees) and 1973 (81 degrees) as O'Hare's warmest October 9th ever.

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1978 the high was 73 with a low of 41, a 32 degree spread. In 1973 the high was 81 with a low of 63, a warm day. In 1969 the high was a warm 79 with a low of 40, a 39 degree spread. In 1967 the high was a cool 48 with a low of 37, a cool day. In 1966 the high was a warm 83 with a low of 49, a 34 degree spread. In 1965 the high was 57 with a low of 50, a seven degree spread. In 1964 the high was 44 (this is the year of the record coolest high) with a low of 24 (cooler than the record low), a cold day. In 1963 the high was a warm 79 with a low of 41, a 38 degree spread. In 1961 the high was a warm 80 with a low of 56, a warm day.


More recently, there was a
large spread of 30 degrees in 1981 (62/32). There were small spreads of three degrees in 1990 (48/45), six degrees in 1983 (56/50) and six degrees in 1984 (63/57).

On the cool side, in 1993 the high was 48 with a low of 32. In 2000 the high was 57 with the record low of 30. Other cool lows were 32 in both 1981 and 1989. Other cool highs were 48 in 1990, 52 last year and 53 in 1986. The record coolest high stands at 43, which occurred in 1964. 16 of the last 31 lows were 40s. Eight lows were in the cooler 30s and seven lows were in the warmer 50s.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:31 and sunrise is at 6:59. Sunset is at 18:21 and twilight ends at 18:49. There's a total of 11 hours, 22 minutes of daylight today and 12 hours, 18 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:32 and sunrise is at 7:00. The moon is waxing crescent. Illumination was 3% at midnight, will be 6% at noon and 9% at midnight tonight. Moonrise is at 9:25 this morning. Moonset is at 19:13 tonight. Moonrise is at 10:38 tomorrow morning. Moonlight time is 9 hours, 48 minutes which is 37 minutes shorter than yesterday.

Columbus Day is in two days and United Nation's Day is in 15 days. -Bernie-

Friday, October 8, 2010

October 8: ORD

Today is October 8th. It's the 281st day of the year. 84 days remain. It's week 41 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 66 and the normal low is 45. I've calculated the 31-year averages at 66 and 46.


On the warm side, in 1997 the high was the record high of 88 with a low of 62. A decade later, in 2007, the high was 87 with a low of 60. Other warm highs were 80 in 2003 and 78 (our warmest 70s high) a decade earlier in 1993.
Other warm lows were 57: in 1984, 1999 and 2004. The record warmest low of 68 occurred in 1939. Over the last 31 years, 27 highs (87%) have been: 50s (7), 60s (11) and 70s (9). Three highs were in the warmer 80s and one high was in the cooler 40s. The three 80s highs occurred more recently, in 1997, 2003 and 2007. Seven of the nine 70s highs occurred between 1980 and 1993. Then there was a decade long 70s drought between 1994 and 2003. Our most recent 70s highs were 72 in 2006 and 70 in 2004.

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1978 the high was 58 with a cold low of 31, a cool day. In 1974 the high was 67 with a low of 35, a 32 degree spread. In 1970 the high was 67 with a warm low of 63, a four degree spread. In 1966 the high was a warm 80 with a low of 55, a warm day. In 1963 the high was 75 with a low of 41, a 34 degree spread. In 1961 the high was 76 with a low of 46, a 30 degree spread.


More recently, there were
large spreads of 35 degrees in 1982 (75/40), 32 degrees in 2003 (80/48) and 30 degrees in 1993 (78/48). There were small spreads of six degrees in 1990 (53/47) and seven degrees in 1999 (64/57).

On the cool side, in 2000 the high was 46 with a low of 31. In 1987 the high was 56 with the record low of 27. In 1989 the high was 55 with a low of 34. Other cool highs were 50 in 1996, 53 in 1990, 53 in 2005 and 53 last year. The record coolest high stands at 41, which occurred way back in 1895. 19 of the last 31 lows were 40s. Four lows were in the cooler: 20s (1) and 30s (3). Eight lows were in the warmer: 50s (6) and 60s (2).

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:30 and sunrise is at 6:58. Sunset is at 18:23 and twilight ends at 18:51. There's a total of 11 hours, 25 minutes of daylight today and 12 hours, 21 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:31 and sunrise is at 6:59. The moon is waxing crescent and was new yesterday afternoon at 13:44. Illumination was 1% at midnight, will be 2% at noon and 3% at midnight tonight. Moonrise is at 8:09 this morning. Moonset is at 18:34 tonight. Moonrise is at 9:25 tomorrow morning. Moonlight time is 10 hours, 25 minutes which is 44 minutes shorter than yesterday.

Columbus Day is in three days and United Nation's Day is in 16 days. -Bernie-

October 7: ORD

Today is October 7th. It's the 280th day of the year. 85 days remain. It's week 40 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 66 and the normal low is 45. I've calculated the 31-year averages at 65 and 44.


On the warm side, in 2007 the high was the record high of 87 with the record warmest low of 67. The former record high was 86 in 1947. The former record warmest low was 66 in 1914. A decade earlier, in 1997, the high was 84 with a low of 63. In 1993 the high was 81 with a low of 58. The next year, 1994, the high was 75 with a low of 61. Another warm high was 80 in 2003.
Another warm low was 60 in 1984. Over the last 31 years, 25 highs (81%) have been: 50s (7), 60s (11) and 70s (7). Four highs in the warmer 80s and two highs were in the cooler 40s. Both 40s highs were 49 degrees (1987 and 2000).

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1978 the high was a cool 54. In 1977 the high was a cool 53. In 1976 the high was a cool 50. In 1975 the high was 76 with a low of 43, a 33 degree spread. In 1974 the high was 54 with a low of 32, a cool day. In 1973 the low was a warm 58. In 1970 the high was 79 with a low of 63, a warm day. In 1966 the high was a warm 78 with a low of 47, a 31 degree spread. In 1964 the high was 68 with a cool low of 24, a 44 degree spread. That low of 24 is cooler than the record low. In 1963 the high was a warm 81 with a low of 49, a 32 degree spread. In 1962 the low was a warm 60. In 1959 the high was 61 with a warm low of 57, a mere four degree spread.


More recently, there were
large spreads of 39 degrees in 2003 (80/41), 35 degrees in 1985 (71/36), 33 degrees in 2004 (76/43), 33 degrees in 1980 (74/41) and 32 degrees in 1983 (77/45). There were small spreads of five degrees in 1984 (65/60), seven degrees in 1995 (53/46) and seven degrees two years ago (63/56).

On the cool side, in 2000 the high was 49 with a low of 30. In 1987 the high was also 49 with a low of 30. In 2001 the high was 52 with the record low of 29. The former record low of 30 occurred in both 1987 and 2000. Another cool low was 33 in 1991. Other cool highs were 53 in 1995 and 54 in 2005. The record coolest high stands at 47, which occurred way back in 1896. 22 of the last 31 lows (71%) were: 30s (9) and 40s (13). One low was in the cooler 20s. Eight lows were in the warmer: 50s (4) and 60s (4). Interestingly, the last 30s low was ten years ago in 2000 (30 degrees) and the lone 20s low (the record low of 29) occurred a year later in 2001. Eight of the nine 30s lows (89%) occurred between 1979 and 1991.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:29 and sunrise is at 6:57. Sunset is at 18:25 and twilight ends at 18:53. There's a total of 11 hours, 28 minutes of daylight today and 12 hours, 24 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:30 and sunrise is at 6:58. The moon is new this afternoon at 13:44. Illumination was 1% at midnight, will be 0% at noon and 1% at midnight tonight. Moonrise is at 6:51 this morning. Moonset is at 18:00 tonight. Moonrise is at 8:09 tomorrow morning. Moonlight time is 11 hours, 9 minutes which is 48 minutes shorter than yesterday.

Columbus Day is in four days and United Nation's Day is in 17 days. -Bernie-

Wednesday, October 6, 2010

October 6: ORD

Today is October 6th. It's the 279th day of the year. 86 days remain. It's week 40 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 67 and the normal low is 46. I've calculated the 31-year averages at 67 and 45.


On the warm side, in 2007 the high was 87 with a low of 69. In 1982 the high was 87 with a low of 61. In 1990 the high was 84 with a low of 60. In 1997 the high was 84 with a low of 56. The record high of 94 was set in 1963. The record warmest low of 70 occurred way back in 1879.
Over the last 31 years, 26 highs (84%) have been: 50s (9), 60s (9) and 70s (8). There were four highs in the warmer 80s and one high in the cooler 40s.

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1970 the high was 79 with a low of 60, a warm day. In 1968 the high was 52 with a low of 48, a four degree spread. In 1966 the high was 67 with a cold low of 28, a 39 degree spread. That low of 28 is equal to the record low. In 1964 the high was 52 with a low of 25, a cold day. That low of 25 is cooler than the record low. In 1963 the high was 91 with a low of 58, a 33 degree spread and warm day. 1963 was the year of the record high of 94, set at Midway. In 1959 the low was a warm 58 degrees.


More recently, there were
large spreads of 34 degrees in 1993 (78/44), 34 degrees in 1992 (70/36) and 33 degrees in 1980 (70/37). There were no small spreads of up to seven degrees.

On the cool side, in 2001 the high was 50 with a low of 30. A year earlier, in 2000, the high was 48 with a low of 34. In 1988 the high was 56 with a low of 30. In 1991 the high was 53 with a low of 35. Another cold low was 32 in 1985. Another cool high was 54 in 1987. The record low of 28 and record coolest high of 46 were set on the same cold day in 1952. 28 of the last 31 lows (90%) were: 30s (11), 40s (10) and 50s (7). Three lows were in the warmer 60s.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:28 and sunrise is at 6:56. Sunset is at 18:26 and twilight ends at 18:54. There's a total of 11 hours, 30 minutes of daylight today and 12 hours, 26 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:29 and sunrise is at 6:57. The moon is waning crescent and will be new tomorrow afternoon at 13:44. Illumination was 4% at midnight, will be 2% at noon and 1% at midnight tonight. Moonrise is at 5:33 this morning. Moonset is at 17:30 this afternoon. Moonrise is at 6:51 tomorrow morning. Moonlight time is 11 hours, 57 minutes which is 49 minutes shorter than yesterday.

Columbus Day is in five days and United Nation's Day is in 18 days. -Bernie-

Tuesday, October 5, 2010

October 5: ORD

Today is October 5th. It's the 278th day of the year. 87 days remain. It's week 40 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 67 and the normal low is 46. I've calculated the 31-year averages at 66 and 44.


On the warm side, in 2005 the high was 84 with the record warmest low of 69. The former record warmest low of 68 occurred in 1922. Three years ago the high was 84 with a low of 62. In 1982 the high was 86 with a low of 54, a 32 degree spread. In 1997 the high was the record high of 88 with a low of 52, a 36 degree spread. Another warm high was 85 in 1990. Another warm low was 58 in 1998.
Over the last 31 years, 16 highs have been in the 60s. There were seven highs in the warmer: 70s (2) and 80s (5) and eight highs in the cooler 50s. The 70s highs occurred 12 years ago (71 in 1998) and 27 years ago (70 in 1983).

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1975 the high was 75 with a low of 42, a 33 degree spread. In 1972 the high was 64 with a warm low of 59, a five degree spread. In 1970 the high was a warm 79 degrees. In 1969 the low was a warm 58 degrees. In 1968 the low was a cold 32 degrees. In 1966 the high was 61 with a cold low of 31, a 30 degree spread. In 1965 the high was 60 with a cold low of 30, a 30 degree spread and a cool day. In 1963 the high was a hot 86 degrees with a low of 45, a 41 degree spread. A spread of 40 degrees or more is rare. In 1960 the high was a warm 79 degrees. In 1959 the low was a warm 58 degrees.


More recently, there were
large spreads of 34 degrees in 1990 (85/51), 30 degrees in 1996 (69/39) and 30 degrees in 1993 (64/34). There was a small spread of four degrees in 1995 (60/56).

On the cool side, in 1980 the high was 54 with the record low of 28. In 1988 the high was 54 with a low of 32. In 2004 the high was 60 with a low of 31. Another cool low was 34 in 1993. Another cool high was 51 in 2001. 22 of the last 31 lows (71%) were: 30s (9) and 40s (13). One low was in the cooler 20s. Eight lows were in the warmer: 50s (6) and 60s (2). The last 50s low occurred 12 years ago in 1998 (58 degrees).

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:27 and sunrise is at 6:55. Sunset is at 18:28 and twilight ends at 18:56. There's a total of 11 hours, 33 minutes of daylight today and 12 hours, 29 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:28 and sunrise is at 6:56. The moon is waning crescent. Illumination was 10% at midnight, will be 6% at noon and 4% at midnight tonight. Moonrise is at 4:15 this morning. Moonset is at 17:01 this afternoon. Moonrise is at 5:33 tomorrow morning. Moonlight time is 12 hours, 46 minutes which is 47 minutes shorter than yesterday.

Columbus Day is in six days and United Nation's Day is in 19 days. -Bernie-

Monday, October 4, 2010

October 4: ORD

Today is October 4th. It's the 277th day of the year. 88 days remain. It's week 40 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 67 and the normal low is 47. I've calculated the 31-year averages at 65 and 45.


On the warm side, in 2005 the high was 87 with the record warmest low of 71. This was the warmest October 4 in O'Hare's history. The former record warmest low of 69 occurred in 1922. Also, that low of 71 tied October 1, 1971 as the warmest October low ever. Another warm high was 82 three years ago. The record high of 90 was set in 1951
. Over the last 31 years, 24 highs (77%) have been: 50s (8) and 60s (16). There were seven highs in the warmer: 70s (5) and 80s (2). There have been just five 80s highs this day in 51 years of record-keeping at O'Hare. The other three are included in the next section.

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1976 the high was a warm 82. In 1975 the high was 75 with a low of 44, a 31 degree spread. In 1969 the high was 80 with a low of 61, a warm day. In 1968 the low was a cool 35 degrees. In 1967 the high was 87 with a low of 66, a hot day (the second hottest of the date). In 1965 the high was 57 with a low of 33, a cool day. In 1963 the high was 73 with a low of 41, a 32 degree spread. In 1959 the high was 60 with a low of 55, a five degree spread.


More recently, there were
large spreads of 36 degrees in 1982 (77/41), 33 degrees in 1987 (69/36), 32 degrees in 1984 (70/38), 31 degrees in 2007 (82/51) and 31 degrees in 1993 (65/34). There were no small spreads of up to seven degrees.

On the cool side, in 1980 the high was 51 with the co-record low of 32. In 1988 the high was 52 with a low of 36. Other cool lows were the other co-record low of 32 in 1989, 34 in 1993 and 35 in 1996. Another cool high was 54 in 1999. 30 of the last 31 lows (97%) were: 30s (11), 40s (9) and 50s (10). One low was in the warmer 70s (71 in 2005). There have been no lows in the 60s over the last 31 years.

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:26 and sunrise is at 6:54. Sunset is at 18:30 and twilight ends at 18:58. There's a total of 11 hours, 36 minutes of daylight today and 12 hours, 32 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:27 and sunrise is at 6:55. The moon is waning crescent. Illumination was 18% at midnight, will be 13% at noon and 10% at midnight tonight. Moonrise is at 2:59 this morning. Moonset is at 16:32 this afternoon. Moonrise is at 4:15 tomorrow morning. Moonlight time is 13 hours, 33 minutes which is 45 minutes shorter than yesterday.

Columbus Day is in seven days. -Bernie-

Sunday, October 3, 2010

October 3: ORD

Today is October 3rd. It's the 276th day of the year. 89 days remain. It's week 40 of the year.

Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.


According to the National Climatic Data Center (NCDC), the normal high is 68 and the normal low is 47. I've calculated the 31-year averages at 68 and 47.


On the warm side, in 2005 the high was 85 with the record warmest low of 70. The former record warmest low of 69 occurred in 1922. In 1997 the high was 87 with a low of 60. In 1983 the high was 80 with a low of 61. Other warm highs were 82 in 1992, 82 in 2006 and 81 in 1990. Another warm low was 61 in 1986. The record high of 91 was set in 1954
. Over the last 31 years, four of the five categories of highs have been almost equal: 50s (6), 60s (7), 70s (10) and 80s (6). This is 29 of 31 or 94%. There were two highs in the cooler 40s .

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1976 the high was a warm 83 with a low of 51, a 32 degree spread. In 1975 the high was 71 with a low of 38, a 33 degree spread. In 1974 the high was 60 with a cold low of 28, a 32 degree spread and cool day. That low of 28 was cooler than the record low. In 1967 the high was 81 with a low of 61, a warm day. In 1964 the high was 76 with a low of 44, a 32 degree spread. In 1961 the high was 60 with a cold low of 30, a 30 degree spread and cool day.


More recently, there were
large spreads of 38 degrees in 1993 (71/33), 34 degrees in 2004 (70/36), 32 degrees in 1984 (75/43), 31 degrees in 1992 (82/51), 31 degrees in 1985 (68/37), 30 degrees in 1990 (81/51) and 30 degrees in 1982 (75/45). There was a small spread of seven degrees in 1998 (58/51).

On the cool side, in 1987 the high was 54 with a low of 31. In 1980 the high was 49 with a low of 37. In 1999 the high was the record coolest high of 47 with a low of 41, a six degree spread. In 1989 the high was 53 with a low of 35. In 1981 the high was 61 with the record low of 29, a 32 degree spread. In 1996 the high was 55 with a low of 38. Another cool low was 33 in 1993. Another cool high was 53 in 2003. 26 of the last 31 lows (84%) were: 30s (7), 40s (9) and 50s (10). One low was in cooler 20s (29 in 1981). Four lows were in the warmer: 60s (3) and 70s (1).

The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:25 and sunrise is at 6:53. Sunset is at 18:31 and twilight ends at 18:59. There's a total of 11 hours, 38 minutes of daylight today and 12 hours, 34 minutes between twilights. We are losing two or three minutes of daylight a day. Tomorrow twilight begins at 6:26 and sunrise is at 6:54. The moon is waning crescent. Illumination was 27% at midnight, will be 22% at noon and 18% at midnight tonight. Moonrise is at 1:43 this morning. Moonset is at 16:01 this afternoon. Moonrise is at 2:59 tomorrow morning. Moonlight time is 14 hours, 18 minutes which is 40 minutes shorter than yesterday.

Columbus Day is in eight days. -Bernie-