Weather History for Chicago, IL

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Saturday, May 12, 2007

  Actual Average Record
Temperature  
Mean Temperature 55 °F 58 °F  
Max Temperature 64 °F 69 °F 92 °F (1956)
Min Temperature 46 °F 47 °F 31 °F (1981)
Degree Days  
Heating Degree Days 10 8  
Month to date heating degree days 55 114  
Since 1 July heating degree days 5977 6181  
Cooling Degree Days 0 1  
Month to date cooling degree days 14 10  
Year to date cooling degree days 23 20  
Growing Degree Days 4 (Base 50)    
Moisture  
Dew Point 35 °F    
Average Humidity 55    
Maximum Humidity 76    
Minimum Humidity 34    
Precipitation  
Precipitation 0.00 in 0.12 in 2.67 in (1935)
Month to date precipitation 0.13 1.39  
Year to date precipitation 10.61 10.79  
Snow  
Snow 0.00 in 0.00 in T in (1923)
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 35.6 36.3  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 30.20 in    
Wind  
Wind Speed 13 mph (NNE)    
Max Wind Speed 21 mph    
Max Gust Speed 31 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 12, 2007 Rise Set
Actual Time 5:34 AM CDT 8:02 PM CDT
Civil Twilight 5:03 AM CDT 8:33 PM CDT
Nautical Twilight 4:23 AM CDT 9:13 PM CDT
Astronomical Twilight 3:40 AM CDT 9:57 PM CDT
Moon 3:05 AM CDT (5/12) 3:12 PM CDT (5/12)
Length of Visible Light 15h 30m
Length of Day
14h 27m
Waning Crescent, 23% of the Moon is Illuminated
May 12
Waning Crescent
May 16
New
May 23
First Quarter
May 31
Full
Jun 8
Last Quarter

Hourly Weather History & Observations

Time (CDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:51 AM 51.1 °F - 35.1 °F 54% 30.12 in 10.0 mi North 15.0 mph 21.9 mph N/A   Clear
1:51 AM 48.9 °F - 37.0 °F 64% 30.11 in 10.0 mi NNE 13.8 mph - N/A   Partly Cloudy
2:51 AM 48.0 °F - 37.9 °F 68% 30.11 in 10.0 mi NNE 12.7 mph - N/A   Partly Cloudy
3:51 AM 48.0 °F - 37.9 °F 68% 30.11 in 10.0 mi NNE 9.2 mph - N/A   Scattered Clouds
4:51 AM 46.9 °F - 39.0 °F 74% 30.12 in 10.0 mi NNE 9.2 mph - N/A   Partly Cloudy
5:51 AM 46.0 °F 39.9 °F 37.9 °F 73% 30.15 in 10.0 mi North 13.8 mph - N/A   Partly Cloudy
6:51 AM 46.9 °F - 37.9 °F 71% 30.17 in 10.0 mi NNE 11.5 mph 21.9 mph N/A   Partly Cloudy
7:51 AM 51.1 °F - 39.0 °F 63% 30.18 in 10.0 mi NNE 10.4 mph - N/A   Clear
8:51 AM 55.0 °F - 39.0 °F 55% 30.20 in 10.0 mi NE 13.8 mph - N/A   Clear
9:51 AM 57.9 °F - 39.0 °F 49% 30.20 in 10.0 mi NNE 13.8 mph - N/A   Partly Cloudy
10:51 AM 60.1 °F - 39.0 °F 46% 30.22 in 10.0 mi NNE 13.8 mph 18.4 mph N/A   Partly Cloudy
11:51 AM 61.0 °F - 39.0 °F 44% 30.23 in 10.0 mi NE 15.0 mph 24.2 mph N/A   Clear
12:51 PM 61.0 °F - 39.0 °F 44% 30.23 in 10.0 mi NNE 16.1 mph - N/A   Clear
1:51 PM 63.0 °F - 39.0 °F 41% 30.22 in 10.0 mi NE 16.1 mph - N/A   Clear
2:51 PM 63.0 °F - 36.0 °F 37% 30.22 in 10.0 mi NE 18.4 mph - N/A   Clear
3:51 PM 63.0 °F - 34.0 °F 34% 30.22 in 10.0 mi NE 18.4 mph 24.2 mph N/A   Partly Cloudy
4:51 PM 62.1 °F - 34.0 °F 35% 30.22 in 10.0 mi NNE 17.3 mph 21.9 mph N/A   Partly Cloudy
5:51 PM 59.0 °F - 34.0 °F 39% 30.23 in 10.0 mi NNE 15.0 mph - N/A   Partly Cloudy
6:51 PM 55.9 °F - 33.1 °F 42% 30.25 in 10.0 mi NE 15.0 mph 26.5 mph N/A   Partly Cloudy
7:51 PM 52.0 °F - 32.0 °F 47% 30.26 in 10.0 mi NNE 16.1 mph 21.9 mph N/A   Scattered Clouds
8:51 PM 51.1 °F - 30.0 °F 44% 30.27 in 10.0 mi NNE 12.7 mph - N/A   Scattered Clouds
9:51 PM 50.0 °F - 26.1 °F 39% 30.28 in 10.0 mi NNE 10.4 mph - N/A   Scattered Clouds
10:51 PM 50.0 °F - 25.0 °F 38% 30.28 in 10.0 mi NNE 8.1 mph - N/A   Scattered Clouds
11:51 PM 48.9 °F - 28.0 °F 44% 30.27 in 10.0 mi North 4.6 mph - N/A   Scattered Clouds