Weather History for Alton, IL

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Tuesday, July 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 84 °F -  
Max Temperature 100 °F 85 °F 102 °F (2006)
Min Temperature 67 °F 67 °F 56 °F (2014)
Cooling Degree Days 18    
Growing Degree Days 34 (Base 50)    
Moisture  
Dew Point 64 °F    
Average Humidity 67    
Maximum Humidity 98    
Minimum Humidity 18    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.92 in    
Wind  
Wind Speed 2 mph (West)    
Max Wind Speed 16 mph    
Max Gust Speed -    
Visibility 7 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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Date:

Astronomy

Jul. 31, 2012 Rise Set
Actual Time 6:00 AM CDT 8:11 PM CDT
Civil Twilight 5:30 AM CDT 8:41 PM CDT
Nautical Twilight 4:54 AM CDT 9:17 PM CDT
Astronomical Twilight 4:14 AM CDT 9:57 PM CDT
Moon 7:00 PM CDT (7/31) 4:22 AM CDT (7/31)
Length of Visible Light 15h 10m
Length of Day
14h 11m
Waxing Gibbous, 97% of the Moon is Illuminated
Jul 31
Waxing Gibbous
Aug 1
Full
Aug 9
Last Quarter
Aug 17
New
Aug 24
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
12:15 AM 70.2 °F - 68.2 °F 93% 29.92 in 5.0 mi Calm Calm - N/A   Clear
12:35 AM 70.5 °F - 69.1 °F 95% 29.92 in 7.0 mi Calm Calm - N/A   Clear
12:55 AM 68.7 °F - 66.9 °F 94% 29.92 in 7.0 mi Calm Calm - N/A   Clear
1:15 AM 69.6 °F - 68.0 °F 95% 29.92 in 5.0 mi Calm Calm - N/A   Clear
1:35 AM 69.8 °F - 68.0 °F 94% 29.91 in 7.0 mi Calm Calm - N/A   Clear
1:55 AM 68.7 °F - 66.9 °F 94% 29.91 in 7.0 mi Calm Calm - N/A   Clear
2:15 AM 68.9 °F - 67.3 °F 95% 29.91 in 5.0 mi Calm Calm - N/A   Clear
2:35 AM 68.5 °F - 67.3 °F 96% 29.91 in 5.0 mi Calm Calm - N/A   Clear
2:55 AM 67.5 °F - 65.8 °F 95% 29.91 in 4.0 mi Calm Calm - N/A   Clear
3:15 AM 69.1 °F - 68.2 °F 97% 29.91 in 3.0 mi WNW 3.5 mph - N/A   Clear
3:35 AM 67.8 °F - 66.7 °F 96% 29.91 in 2.5 mi Calm Calm - N/A   Clear
3:55 AM 69.8 °F - 68.9 °F 97% 29.91 in 3.0 mi Calm Calm - N/A   Clear
4:15 AM 67.5 °F - 66.2 °F 96% 29.91 in 1.8 mi West 3.5 mph - N/A   Mist
4:35 AM 68.5 °F - 67.8 °F 98% 29.91 in 3.0 mi Calm Calm - N/A   Clear
4:55 AM 68.5 °F - 67.6 °F 97% 29.92 in 4.0 mi Calm Calm - N/A   Clear
5:15 AM 67.6 °F - 66.9 °F 98% 29.92 in 3.0 mi SSW 3.5 mph - N/A   Clear
5:35 AM 68.2 °F - 67.5 °F 98% 29.93 in 4.0 mi Calm Calm - N/A   Clear
5:55 AM 69.1 °F - 68.4 °F 98% 29.93 in 2.5 mi Calm Calm - N/A   Clear
6:50 AM 71.6 °F - 69.8 °F 94% 29.96 in 10.0 mi NW 4.6 mph - N/A   Partly Cloudy
6:55 AM 70.9 °F - 70.2 °F 98% 29.96 in 1.8 mi Calm Calm - N/A   Mist
7:50 AM 75.2 °F - 73.4 °F 94% 29.97 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
8:50 AM 80.6 °F 84.6 °F 71.6 °F 74% 29.98 in 10.0 mi WSW 4.6 mph - N/A   Scattered Clouds
9:50 AM 87.8 °F 93.8 °F 71.6 °F 58% 29.97 in 10.0 mi SW 16.1 mph - N/A   Scattered Clouds
10:50 AM 91.4 °F 95.4 °F 68.0 °F 46% 29.97 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
11:50 AM 93.2 °F 94.9 °F 64.4 °F 38% 29.96 in 10.0 mi Variable 3.5 mph - N/A   Partly Cloudy
12:55 PM 95.0 °F 94.4 °F 59.0 °F 30% 29.94 in 10.0 mi SW 6.9 mph - N/A   Partly Cloudy
1:54 PM 98.6 °F 96.4 °F 53.6 °F 22% 29.92 in 10.0 mi WSW 9.2 mph - N/A   Clear
2:50 PM 100.4 °F 98.8 °F 55.4 °F 22% 29.91 in 10.0 mi Calm Calm - N/A   Clear
3:50 PM 100.4 °F - 51.8 °F 20% 29.91 in 10.0 mi West 11.5 mph - N/A   Clear
4:50 PM 100.4 °F 98.4 °F 53.6 °F 21% 29.88 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
5:50 PM 100.4 °F - 50.0 °F 18% 29.86 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
6:50 PM 100.4 °F - 51.8 °F 20% 29.86 in 10.0 mi WSW 11.5 mph - N/A   Partly Cloudy
7:50 PM 93.2 °F 91.9 °F 57.2 °F 30% 29.86 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
8:50 PM 87.8 °F 87.6 °F 60.8 °F 40% 29.87 in 10.0 mi WNW 6.9 mph - N/A   Clear
9:50 PM 89.6 °F 88.9 °F 59.0 °F 36% 29.90 in 10.0 mi NNE 9.2 mph - N/A   Clear
10:15 PM 87.8 °F 87.4 °F 59.9 °F 39% 29.91 in 10.0 mi North 3.5 mph - N/A   Clear
10:35 PM 87.8 °F 87.1 °F 59.2 °F 38% 29.91 in 10.0 mi North 3.5 mph - N/A   Clear
10:55 PM 86.4 °F 85.6 °F 59.0 °F 39% 29.91 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 85.6 °F 85.2 °F 59.2 °F 41% 29.92 in 10.0 mi Calm Calm - N/A   Clear
11:35 PM 84.6 °F 84.4 °F 59.9 °F 43% 29.92 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 83.5 °F 83.7 °F 60.4 °F 46% 29.92 in 10.0 mi Calm Calm - N/A   Clear