Weather History for Chicago, IL

Change the Weather History Date:

Saturday, August 18, 2012

  Actual Average Record
Temperature  
Mean Temperature 65 °F 72 °F  
Max Temperature 77 °F 82 °F 98 °F (1947)
Min Temperature 53 °F 63 °F 49 °F (1963)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 June heating degree days 14 52  
Since 1 July heating degree days 0 4  
Cooling Degree Days 0 8  
Month to date cooling degree days 140 151  
Year to date cooling degree days 1108 653  
Since 1 June cooling degree days 937 599  
Growing Degree Days 15 (Base 50)    
Moisture  
Dew Point 51 °F    
Average Humidity 67    
Maximum Humidity 100    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in 0.17 in 2.85 in (1990)
Month to date precipitation 1.39 2.98  
Year to date precipitation 18.16 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 29.99 in    
Wind  
Wind Speed 5 mph (SSE)    
Max Wind Speed 14 mph    
Max Gust Speed 25 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Aug. 18, 2012 Rise Set
Actual Time 6:03 AM CDT 7:46 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 7:13 AM CDT (8/18) 7:59 PM CDT (8/18)
Length of Visible Light 14h 43m
Length of Day
13h 43m
New Moon, 1% of the Moon is Illuminated
Aug 18
New Moon
Aug 24
First Quarter
Aug 31
Full
Sep 8
Last Quarter
Sep 15
New

Hourly Weather History & Observations

Time (CDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:51 AM 63.0 °F 55.0 °F 75% 30.01 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:51 AM 60.1 °F 55.0 °F 83% 30.01 in 10.0 mi Calm Calm - N/A   Clear
2:51 AM 59.0 °F 55.0 °F 87% 30.01 in 10.0 mi Calm Calm - N/A   Clear
3:51 AM 55.9 °F 53.1 °F 90% 30.02 in 10.0 mi Calm Calm - N/A   Clear
4:51 AM 57.0 °F 54.0 °F 89% 30.02 in 10.0 mi Calm Calm - N/A   Clear
5:51 AM 53.6 °F 53.6 °F 100% 30.03 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:51 AM 55.0 °F 53.1 °F 93% 30.03 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:51 AM 62.1 °F 54.0 °F 75% 30.04 in 10.0 mi SSW 4.6 mph - N/A   Scattered Clouds
8:51 AM 64.4 °F 53.6 °F 68% 30.04 in 10.0 mi SSW 4.6 mph - N/A   Scattered Clouds
9:51 AM 68.0 °F 53.1 °F 59% 30.03 in 10.0 mi SE 3.5 mph - N/A   Mostly Cloudy
10:51 AM 70.0 °F 50.0 °F 49% 30.02 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
11:51 AM 72.0 °F 48.0 °F 43% 30.02 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy
12:51 PM 73.4 °F 48.2 °F 41% 30.00 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
1:51 PM 72.0 °F 48.0 °F 43% 29.98 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:51 PM 75.0 °F 46.9 °F 37% 29.97 in 10.0 mi SSW 3.5 mph - N/A   Mostly Cloudy
3:51 PM 75.0 °F 48.0 °F 38% 29.96 in 10.0 mi SW 5.8 mph - N/A   Scattered Clouds
4:51 PM 77.0 °F 46.0 °F 33% 29.93 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
5:51 PM 73.4 °F 48.2 °F 41% 29.93 in 10.0 mi East 12.7 mph - N/A   Mostly Cloudy
6:51 PM 72.0 °F 50.0 °F 46% 29.94 in 10.0 mi East 10.4 mph - N/A   Mostly Cloudy
7:51 PM 70.0 °F 50.0 °F 49% 29.94 in 10.0 mi East 10.4 mph - N/A   Mostly Cloudy
8:51 PM 70.0 °F 50.0 °F 49% 29.95 in 10.0 mi East 8.1 mph - N/A   Overcast
9:51 PM 70.0 °F 50.0 °F 49% 29.96 in 10.0 mi East 8.1 mph - N/A   Overcast
10:51 PM 68.0 °F 50.0 °F 52% 29.96 in 10.0 mi SE 5.8 mph - N/A   Overcast
11:51 PM 66.9 °F 50.0 °F 54% 29.96 in 10.0 mi Calm Calm - N/A   Overcast