Weather History for Chicago, IL

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Sunday, August 18, 2013

  Actual Average Record
Temperature  
Mean Temperature 70 °F 72 °F  
Max Temperature 81 °F 82 °F 98 °F (1947)
Min Temperature 59 °F 63 °F 49 °F (1963)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 2 0  
Since 1 June heating degree days 54 52  
Since 1 July heating degree days 11 4  
Cooling Degree Days 5 8  
Month to date cooling degree days 100 151  
Year to date cooling degree days 608 653  
Since 1 June cooling degree days 524 599  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 58 °F    
Average Humidity 68    
Maximum Humidity 97    
Minimum Humidity 39    
Precipitation  
Precipitation 0.00 in 0.17 in 2.85 in (1990)
Month to date precipitation 1.02 2.98  
Year to date precipitation 31.70 23.21  
Snow  
Snow 0.00 in 0.00 in 0.00 in ()
Month to date snowfall 0.0 0.0  
Since 1 June snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 5 mph (East)    
Max Wind Speed 14 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Aug. 18, 2013 Rise Set
Actual Time 6:03 AM CDT 7:47 PM CDT
Civil Twilight 5:33 AM CDT 8:16 PM CDT
Nautical Twilight 4:57 AM CDT 8:52 PM CDT
Astronomical Twilight 4:18 AM CDT 9:31 PM CDT
Moon 5:54 PM CDT (8/18) 3:10 AM CDT (8/18)
Length of Visible Light 14h 43m
Length of Day
13h 44m
Waxing Gibbous, 92% of the Moon is Illuminated
Aug 18
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter

Hourly Weather History & Observations

Time (CDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:51 AM 68.0 °F - 61.0 °F 78% 30.17 in 10.0 mi Calm Calm - N/A   Clear
1:51 AM 64.9 °F - 61.0 °F 87% 30.17 in 10.0 mi Calm Calm - N/A   Clear
2:51 AM 63.0 °F - 60.1 °F 90% 30.17 in 10.0 mi Calm Calm - N/A   Clear
3:51 AM 66.0 °F - 62.1 °F 87% 30.16 in 10.0 mi NNE 4.6 mph - N/A   Clear
4:51 AM 63.0 °F - 61.0 °F 93% 30.16 in 10.0 mi North 3.5 mph - N/A   Clear
5:51 AM 62.1 °F - 60.1 °F 93% 30.18 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:51 AM 61.0 °F - 59.0 °F 93% 30.19 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:51 AM 68.0 °F - 63.0 °F 84% 30.20 in 10.0 mi Variable 3.5 mph - N/A   Clear
8:51 AM 72.0 °F - 62.1 °F 71% 30.20 in 10.0 mi NNE 4.6 mph - N/A   Partly Cloudy
9:51 AM 75.9 °F - 57.9 °F 54% 30.19 in 10.0 mi ENE 4.6 mph - N/A   Scattered Clouds
10:51 AM 77.0 °F - 57.0 °F 50% 30.19 in 10.0 mi East 4.6 mph - N/A   Scattered Clouds
11:51 AM 78.1 °F - 55.0 °F 45% 30.17 in 10.0 mi East 9.2 mph - N/A   Scattered Clouds
12:51 PM 80.1 °F 80.2 °F 55.9 °F 43% 30.16 in 10.0 mi East 6.9 mph - N/A   Scattered Clouds
1:51 PM 80.1 °F 80.2 °F 55.9 °F 43% 30.14 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
2:51 PM 79.0 °F - 55.9 °F 45% 30.13 in 10.0 mi East 8.1 mph - N/A   Partly Cloudy
3:51 PM 81.0 °F 80.5 °F 54.0 °F 39% 30.11 in 10.0 mi NE 8.1 mph - N/A   Partly Cloudy
4:51 PM 80.1 °F 80.0 °F 54.0 °F 40% 30.10 in 10.0 mi East 8.1 mph - N/A   Scattered Clouds
5:51 PM 79.0 °F - 54.0 °F 42% 30.10 in 10.0 mi East 9.2 mph - N/A   Scattered Clouds
6:51 PM 77.0 °F - 54.0 °F 45% 30.10 in 10.0 mi East 8.1 mph - N/A   Scattered Clouds
7:51 PM 73.9 °F - 54.0 °F 50% 30.10 in 10.0 mi East 8.1 mph - N/A   Scattered Clouds
8:51 PM 73.0 °F - 55.0 °F 53% 30.11 in 10.0 mi East 5.8 mph - N/A   Scattered Clouds
9:51 PM 69.1 °F - 55.0 °F 61% 30.12 in 10.0 mi SE 4.6 mph - N/A   Clear
10:51 PM 66.0 °F - 57.0 °F 73% 30.11 in 10.0 mi SE 6.9 mph - N/A   Clear
11:51 PM 66.9 °F - 57.0 °F 70% 30.11 in 10.0 mi South 3.5 mph - N/A   Clear