Weather History for Chicago DuPage, IL

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Saturday, December 31, 2011

  Actual Average Record
Temperature  
Mean Temperature 32 °F 24 °F  
Max Temperature 39 °F 32 °F 55 °F (2006)
Min Temperature 24 °F 16 °F -24 °F (1999)
Degree Days  
Heating Degree Days 34 41  
Month to date heating degree days 1171  
Since 1 July heating degree days 2427  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 814  
Moisture  
Dew Point 30 °F    
Average Humidity 89    
Maximum Humidity 93    
Minimum Humidity 79    
Precipitation  
Precipitation 0.00 in 0.04 in 0.61 in (2010)
Month to date precipitation 1.72  
Year to date precipitation 36.91  
Sea Level Pressure  
Sea Level Pressure 29.90 in    
Wind  
Wind Speed 9 mph (South)    
Max Wind Speed 20 mph    
Max Gust Speed 28 mph    
Visibility 4 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 31, 2011 Rise Set
Actual Time 7:20 AM CST 4:31 PM CST
Civil Twilight 6:49 AM CST 5:03 PM CST
Nautical Twilight 6:13 AM CST 5:38 PM CST
Astronomical Twilight 5:40 AM CST 6:11 PM CST
Moon 10:58 AM CST (12/31) No Moon Set
Length of Visible Light 10h 13m
Length of Day
9h 10m
Waxing Crescent, 45% of the Moon is Illuminated
Dec 31
Waxing Crescent
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New

Hourly Weather History & Observations

Time (CST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 34.0 °F 26.0 °F 30.0 °F 85% 29.86 in 5.0 mi WNW 10.4 mph - N/A   Overcast
1:52 AM 34.0 °F 28.8 °F 30.0 °F 85% 29.87 in 7.0 mi NW 5.8 mph - N/A   Overcast
2:04 AM 33.8 °F 26.4 °F 28.4 °F 81% 29.86 in 7.0 mi NW 9.2 mph - N/A   Overcast
2:45 AM 32.0 °F 25.6 °F 28.4 °F 87% 29.88 in 6.0 mi WNW 6.9 mph - N/A   Scattered Clouds
2:52 AM 32.0 °F 25.6 °F 28.0 °F 85% 29.90 in 6.0 mi WNW 6.9 mph - N/A   Partly Cloudy
7:12 AM 26.6 °F - 23.0 °F 86% 29.96 in 1.0 mi Calm Calm - N/A   Clear
7:26 AM 24.8 °F - 23.0 °F 93% 29.96 in 0.5 mi Calm Calm - N/A Fog Light Freezing Fog
7:38 AM 26.6 °F - 23.0 °F 86% 29.97 in 1.5 mi Calm Calm - N/A   Clear
7:50 AM 24.8 °F - 23.0 °F 93% 29.97 in 0.5 mi Calm Calm - N/A Fog Light Freezing Fog
7:52 AM 25.0 °F 20.7 °F 23.0 °F 92% 30.00 in 0.5 mi South 3.5 mph - N/A Fog Light Freezing Fog
7:57 AM 24.8 °F 20.5 °F 23.0 °F 93% 29.98 in 3.0 mi South 3.5 mph - N/A   Clear
8:52 AM 30.0 °F 26.5 °F 28.0 °F 92% 30.01 in 3.0 mi South 3.5 mph - N/A   Clear
8:59 AM 30.2 °F 25.4 °F 28.4 °F 93% 29.99 in 1.8 mi South 4.6 mph - N/A   Clear
9:11 AM 30.2 °F 21.9 °F 28.4 °F 93% 30.00 in 1.8 mi SW 9.2 mph - N/A   Scattered Clouds
9:14 AM 30.2 °F 21.3 °F 28.4 °F 93% 30.00 in 3.0 mi SW 10.4 mph - N/A   Mostly Cloudy
9:52 AM 30.0 °F 24.1 °F 28.0 °F 92% 30.03 in 0.2 mi SSW 5.8 mph - N/A Fog Light Freezing Fog
10:35 AM 30.2 °F 21.3 °F 28.4 °F 93% 30.00 in 1.0 mi South 10.4 mph - N/A   Mist
11:05 AM 30.2 °F 19.3 °F 28.4 °F 93% 29.97 in 1.2 mi South 15.0 mph - N/A   Overcast
11:19 AM 30.2 °F 19.8 °F 28.4 °F 93% 29.97 in 0.5 mi South 13.8 mph - N/A Fog Light Freezing Fog
11:52 AM 32.0 °F 22.5 °F 30.0 °F 92% 29.96 in 0.8 mi South 12.7 mph - N/A   Overcast
12:05 PM 32.0 °F 21.2 °F 30.2 °F 93% 29.92 in 1.2 mi South 16.1 mph - N/A   Overcast
12:26 PM 33.8 °F 25.3 °F 30.2 °F 87% 29.91 in 2.0 mi South 11.5 mph - N/A   Overcast
12:41 PM 33.8 °F 25.3 °F 30.2 °F 87% 29.90 in 3.0 mi South 11.5 mph - N/A   Overcast
12:52 PM 34.0 °F 25.5 °F 30.9 °F 89% 29.92 in 3.0 mi South 11.5 mph - N/A   Overcast
1:36 PM 35.6 °F 26.6 °F 32.0 °F 87% 29.89 in 3.0 mi South 13.8 mph - N/A   Overcast
1:52 PM 35.1 °F 26.9 °F 32.0 °F 89% 29.91 in 4.0 mi South 11.5 mph - N/A   Overcast
2:52 PM 36.0 °F 28.0 °F 32.0 °F 86% 29.88 in 4.0 mi SSE 11.5 mph - N/A   Overcast
3:30 PM 35.6 °F 25.9 °F 33.8 °F 93% 29.87 in 3.0 mi South 16.1 mph - N/A   Overcast
3:49 PM 35.6 °F 27.1 °F 33.8 °F 93% 29.86 in 2.5 mi SSE 12.7 mph 21.9 mph N/A   Overcast
3:52 PM 36.0 °F 26.7 °F 33.1 °F 89% 29.88 in 2.5 mi SSE 15.0 mph 21.9 mph N/A   Overcast
4:10 PM 35.6 °F 26.2 °F 33.8 °F 93% 29.86 in 3.0 mi SSE 15.0 mph 23.0 mph N/A   Overcast
4:52 PM 37.0 °F 26.7 °F 34.0 °F 89% 29.88 in 5.0 mi South 19.6 mph - N/A   Overcast
5:07 PM 37.4 °F 27.8 °F 33.8 °F 87% 29.84 in 6.0 mi SSE 17.3 mph 23.0 mph N/A   Overcast
5:52 PM 37.0 °F 26.7 °F 34.0 °F 89% 29.83 in 6.0 mi SSE 19.6 mph 27.6 mph N/A   Overcast
6:52 PM 37.0 °F 27.0 °F 33.1 °F 86% 29.82 in 7.0 mi SSE 18.4 mph 26.5 mph N/A   Overcast
7:52 PM 37.9 °F 29.2 °F 34.0 °F 86% 29.80 in 8.0 mi SSE 15.0 mph 24.2 mph N/A   Overcast
8:40 PM 39.2 °F 29.8 °F 35.6 °F 87% 29.77 in 8.0 mi South 18.4 mph 23.0 mph N/A   Overcast
8:52 PM 39.0 °F 29.9 °F 35.1 °F 86% 29.78 in 9.0 mi SSE 17.3 mph 25.3 mph N/A   Overcast
9:39 PM 37.4 °F 29.3 °F 33.8 °F 87% 29.74 in 9.0 mi SSE 12.7 mph 21.9 mph N/A   Partly Cloudy
9:52 PM 37.9 °F 29.6 °F 34.0 °F 86% 29.75 in 9.0 mi SSE 13.8 mph - N/A   Clear
11:52 PM 39.0 °F 33.4 °F 33.1 °F 79% 29.65 in 10.0 mi SSE 8.1 mph - N/A   Clear