Weather History for Alton, IL

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Sunday, August 19, 2012

  Actual Average Record
Temperature  
Mean Temperature 72 °F -  
Max Temperature 83 °F 83 °F 95 °F (2005)
Min Temperature 60 °F 64 °F 57 °F (2008)
Cooling Degree Days 7    
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 53 °F    
Average Humidity 63    
Maximum Humidity 84    
Minimum Humidity 18    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.95 in    
Wind  
Wind Speed 2 mph (North)    
Max Wind Speed 16 mph    
Max Gust Speed -    
Visibility 10 miles    
Events      
Averages and records for this station are not official NWS values.
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 19, 2012 Rise Set
Actual Time 6:17 AM CDT 7:48 PM CDT
Civil Twilight 5:49 AM CDT 8:16 PM CDT
Nautical Twilight 5:15 AM CDT 8:50 PM CDT
Astronomical Twilight 4:39 AM CDT 9:26 PM CDT
Moon 8:30 AM CDT (8/19) 8:40 PM CDT (8/19)
Length of Visible Light 14h 27m
Length of Day
13h 30m
Waxing Crescent, 5% of the Moon is Illuminated
Aug 19
Waxing Crescent
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
12:15 AM 66.4 °F 58.6 °F 76% 29.95 in 10.0 mi Calm Calm - N/A   Clear
12:35 AM 66.2 °F 58.5 °F 76% 29.95 in 10.0 mi Calm Calm - N/A   Clear
12:55 AM 65.8 °F 57.0 °F 73% 29.95 in 10.0 mi Calm Calm - N/A   Clear
1:15 AM 65.5 °F 57.7 °F 76% 29.94 in 10.0 mi Calm Calm - N/A   Clear
1:35 AM 64.8 °F 58.1 °F 79% 29.94 in 10.0 mi Calm Calm - N/A   Clear
1:55 AM 64.6 °F 58.6 °F 81% 29.93 in 10.0 mi Calm Calm - N/A   Clear
2:15 AM 64.8 °F 59.2 °F 82% 29.93 in 10.0 mi Calm Calm - N/A   Clear
2:35 AM 64.9 °F 58.8 °F 81% 29.93 in 10.0 mi Calm Calm - N/A   Clear
2:55 AM 64.8 °F 59.0 °F 82% 29.93 in 10.0 mi Calm Calm - N/A   Clear
3:15 AM 65.3 °F 59.5 °F 82% 29.93 in 10.0 mi Calm Calm - N/A   Clear
3:35 AM 65.1 °F 59.5 °F 82% 29.93 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:55 AM 64.9 °F 59.9 °F 84% 29.94 in 10.0 mi Calm Calm - N/A   Overcast
4:15 AM 65.3 °F 58.3 °F 78% 29.94 in 10.0 mi North 3.5 mph - N/A   Overcast
4:35 AM 65.8 °F 57.2 °F 74% 29.94 in 10.0 mi North 3.5 mph - N/A   Overcast
4:55 AM 65.7 °F 57.2 °F 74% 29.94 in 10.0 mi North 3.5 mph - N/A   Overcast
5:15 AM 65.3 °F 57.7 °F 76% 29.95 in 10.0 mi North 3.5 mph - N/A   Overcast
5:35 AM 65.3 °F 57.6 °F 76% 29.95 in 10.0 mi NNE 3.5 mph - N/A   Mostly Cloudy
5:55 AM 65.3 °F 57.9 °F 77% 29.95 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
6:15 AM 65.8 °F 56.8 °F 73% 29.96 in 10.0 mi Calm Calm - N/A   Overcast
6:35 AM 65.5 °F 57.2 °F 75% 29.96 in 10.0 mi Calm Calm - N/A   Overcast
6:55 AM 65.7 °F 58.1 °F 77% 29.96 in 10.0 mi Calm Calm - N/A   Overcast
11:50 AM 78.8 °F 44.6 °F 30% 29.98 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:50 PM 80.6 °F 48.2 °F 32% 29.96 in 10.0 mi NNW 16.1 mph - N/A   Mostly Cloudy
1:50 PM 78.8 °F 48.2 °F 34% 29.96 in 10.0 mi North 4.6 mph - N/A   Mostly Cloudy
2:50 PM 82.4 °F 42.8 °F 25% 29.95 in 10.0 mi NNW 9.2 mph - N/A   Mostly Cloudy
3:50 PM 82.4 °F 42.8 °F 25% 29.93 in 10.0 mi North 9.2 mph - N/A   Mostly Cloudy
4:50 PM 82.4 °F 39.2 °F 21% 29.93 in 10.0 mi North 11.5 mph - N/A   Mostly Cloudy
5:50 PM 78.8 °F 32.0 °F 18% 29.93 in 10.0 mi NNW 11.5 mph - N/A   Scattered Clouds
6:50 PM 78.8 °F 32.0 °F 18% 29.93 in 10.0 mi North 9.2 mph - N/A   Scattered Clouds
7:50 PM 71.6 °F 48.2 °F 43% 29.93 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:50 PM 66.2 °F 44.6 °F 46% 29.95 in 10.0 mi Calm Calm - N/A   Clear
9:50 PM 66.2 °F 48.2 °F 52% 29.96 in 10.0 mi Calm Calm - N/A   Clear
10:15 PM 63.0 °F 52.9 °F 70% 29.97 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 62.6 °F 52.3 °F 69% 29.97 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 62.2 °F 53.1 °F 72% 29.97 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 62.6 °F 52.7 °F 70% 29.97 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 60.8 °F 53.8 °F 78% 29.98 in 10.0 mi Calm Calm - N/A   Clear