History for Chicago, IL

Monday, August 20, 2012 — View Current Conditions
Monday, August 20, 2012
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Daily Weekly Monthly Custom
  Actual Average Record
Temperature
Mean Temperature 66 °F 72 °F  
Max Temperature 74 °F 82 °F 98 °F (1947)
Min Temperature 58 °F 63 °F 47 °F (1950)
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 1 7  
Month to date cooling degree days 146 166  
Year to date cooling degree days 1114 668  
Since 1 June cooling degree days 943 614  
Growing Degree Days 15 (Base 50)    
Moisture
Dew Point 56 °F    
Average Humidity 67    
Maximum Humidity 87    
Minimum Humidity 46    
Precipitation
Precipitation 0.08 in 0.16 in 1.47 in (1951)
Month to date precipitation 1.47 3.30  
Year to date precipitation 18.24 23.53  
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 29.97 in    
Wind
Wind Speed 6 mph (NE)    
Max Wind Speed 17 mph    
Max Gust Speed 23 mph    
Visibility 10 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary
Daily Graph
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Local Photos
Approaching storm
Spotty thunderstorm over Lake Michigan.
Approaching storm
Spotty thunderstorm over Lake Michigan.
Clouds in the distance
Soybean Field
11:10 AM CDT Midday in August
Midday in August
Soybean Field 11:09 AM CDT
Small thundershower (2)
This is the same location as (1); roughly the same time but about 20 seconds later, and a little wider shot.
Small Thundershower (3)
A different view of the same small, slow moving, isolated thunderstorm approaching from the northwest -- a different location couple minutes later -- 3...
Majestic Clouds
11:10 AM. These cumulus clouds in the distance over prairie farms made me think of snow capped mountains soaring above a fertile valley. This was shot...
Small thundershower (1)
A small, slow moving, isolated thunderstorm approaches from the northwest at 2:58 PM CDT. It weakened before it arrived here, but we received a little ...
Approaching storm
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Astronomy
May. 24, 2013 Rise Set
Actual Time 6:05 AM CDT 7:43 PM CDT
Civil Twilight 5:35 AM CDT 8:13 PM CDT
Nautical Twilight 4:59 AM CDT 8:48 PM CDT
Astronomical Twilight 4:21 AM CDT 9:26 PM CDT
Moon 9:31 AM CDT (8/20) 9:01 PM CDT (8/20)
Length Of Visible Light 14h 37m
Length of Day
13h 38m
Waxing Crescent, 11% of the Moon is Illuminated
Aug 20
Waxing Crescent
Aug 24
First Quarter
Aug 31
Full
Sep 8
Last Quarter
Sep 15
New
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Hourly Observations
Time (CDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:51 AM 64.0 °F 54.0 °F 70% 29.94 in 10.0 mi North 4.6 mph - N/A   Scattered Clouds
1:51 AM 64.0 °F 57.0 °F 78% 29.93 in 10.0 mi North 4.6 mph - N/A   Clear
2:51 AM 64.4 °F 57.2 °F 77% 29.94 in 10.0 mi North 3.5 mph - N/A   Partly Cloudy
3:51 AM 59.0 °F 55.0 °F 87% 29.94 in 10.0 mi North 3.5 mph - N/A   Partly Cloudy
4:51 AM 62.6 °F 55.4 °F 77% 29.95 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
5:51 AM 61.0 °F 55.9 °F 83% 29.96 in 10.0 mi North 3.5 mph - N/A   Scattered Clouds
6:51 AM 63.0 °F 55.9 °F 78% 29.97 in 10.0 mi NNW 4.6 mph - N/A   Scattered Clouds
7:51 AM 64.0 °F 57.9 °F 80% 29.98 in 10.0 mi North 5.8 mph - N/A   Scattered Clouds
8:51 AM 70.0 °F 60.1 °F 71% 29.97 in 10.0 mi North 6.9 mph - N/A   Scattered Clouds
9:51 AM 73.0 °F 60.1 °F 64% 29.97 in 10.0 mi Variable 4.6 mph - N/A   Mostly Cloudy
10:51 AM 72.0 °F 59.0 °F 64% 29.97 in 10.0 mi East 11.5 mph - N/A   Mostly Cloudy
11:00 AM 71.6 °F 60.8 °F 69% 29.98 in 10.0 mi ESE 10.4 mph - N/A Thunderstorm Thunderstorm
11:42 AM 69.8 °F 57.2 °F 64% 29.98 in 10.0 mi ESE 13.8 mph - N/A   Mostly Cloudy
11:51 AM 71.6 °F 57.2 °F 60% 29.98 in 10.0 mi ESE 13.8 mph - N/A   Mostly Cloudy
12:51 PM 70.0 °F 59.0 °F 68% 29.97 in 10.0 mi SE 10.4 mph - 0.02 in   Mostly Cloudy
1:51 PM 71.1 °F 57.9 °F 63% 29.96 in 10.0 mi East 11.5 mph - N/A   Mostly Cloudy
2:51 PM 73.0 °F 55.0 °F 53% 29.95 in 10.0 mi East 8.1 mph - N/A   Mostly Cloudy
3:51 PM 72.0 °F 57.0 °F 59% 29.94 in 10.0 mi East 5.8 mph - 0.03 in   Mostly Cloudy
4:51 PM 73.0 °F 53.1 °F 49% 29.95 in 10.0 mi North 13.8 mph - N/A   Mostly Cloudy
5:51 PM 73.0 °F 52.0 °F 48% 29.95 in 10.0 mi ENE 11.5 mph - N/A   Mostly Cloudy
6:51 PM 71.1 °F 50.0 °F 47% 29.95 in 10.0 mi ENE 6.9 mph - N/A   Mostly Cloudy
7:51 PM 66.9 °F 53.1 °F 61% 29.96 in 10.0 mi North 11.5 mph - 0.00 in Rain Light Rain
7:54 PM 66.2 °F 53.6 °F 64% 29.97 in 9.0 mi NNW 10.4 mph - 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
8:51 PM 63.0 °F 55.9 °F 78% 29.99 in 10.0 mi SW 3.5 mph - 0.03 in Rain , Thunderstorm Light Thunderstorms and Rain
9:27 PM 62.6 °F 55.4 °F 77% 30.01 in 10.0 mi WSW 3.5 mph - 0.00 in   Overcast
9:51 PM 62.1 °F 55.0 °F 78% 30.01 in 10.0 mi Calm Calm - 0.00 in   Overcast
10:51 PM 63.0 °F 55.0 °F 75% 30.01 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:51 PM 62.1 °F 57.9 °F 86% 30.00 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
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