Weather History for Alton, IL

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Sunday, September 16, 2012

  Actual Average Record
Temperature  
Mean Temperature 65 °F -  
Max Temperature 76 °F 77 °F 93 °F (1997)
Min Temperature 55 °F 55 °F 46 °F (1999)
Growing Degree Days 15 (Base 50)    
Moisture  
Dew Point 58 °F    
Average Humidity 83    
Maximum Humidity 94    
Minimum Humidity 61    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.08 in    
Wind  
Wind Speed 1 mph (South)    
Max Wind Speed 9 mph    
Max Gust Speed -    
Visibility 9 miles    
Events Fog    
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

Sep. 16, 2012 Rise Set
Actual Time 6:42 AM CDT 7:05 PM CDT
Civil Twilight 6:16 AM CDT 7:32 PM CDT
Nautical Twilight 5:44 AM CDT 8:03 PM CDT
Astronomical Twilight 5:12 AM CDT 8:35 PM CDT
Moon 7:21 AM CDT (9/16) 7:12 PM CDT (9/16)
Length of Visible Light 13h 16m
Length of Day
12h 23m
New Moon, 0% of the Moon is Illuminated
Sep 16
New Moon
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 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 57.0 °F 53.1 °F 87% 30.15 in 10.0 mi Calm Calm - N/A   Clear
12:35 AM 56.3 °F 52.9 °F 88% 30.15 in 10.0 mi Calm Calm - N/A   Clear
12:55 AM 56.5 °F 53.4 °F 89% 30.15 in 10.0 mi Calm Calm - N/A   Clear
1:15 AM 56.5 °F 52.9 °F 88% 30.14 in 10.0 mi Calm Calm - N/A   Clear
1:35 AM 55.9 °F 52.9 °F 89% 30.14 in 10.0 mi Calm Calm - N/A   Clear
1:55 AM 55.9 °F 52.7 °F 89% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:15 AM 56.3 °F 53.1 °F 89% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
2:35 AM 57.7 °F 54.5 °F 89% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
2:55 AM 58.6 °F 54.3 °F 86% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
3:15 AM 59.2 °F 54.7 °F 85% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
3:35 AM 59.4 °F 55.4 °F 87% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
3:55 AM 60.3 °F 55.9 °F 86% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
4:15 AM 61.0 °F 55.8 °F 83% 30.10 in 10.0 mi Calm Calm - N/A   Overcast
4:35 AM 61.3 °F 55.2 °F 80% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
4:55 AM 61.7 °F 55.8 °F 81% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
5:15 AM 61.7 °F 56.3 °F 82% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
5:35 AM 62.6 °F 57.2 °F 82% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
5:55 AM 61.7 °F 56.7 °F 84% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
6:15 AM 62.1 °F 57.4 °F 85% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
6:35 AM 62.2 °F 57.4 °F 84% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
6:55 AM 62.1 °F 57.2 °F 84% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
12:50 PM 73.4 °F 59.0 °F 61% 30.09 in 10.0 mi SSW 5.8 mph - N/A   Overcast
1:50 PM 75.2 °F 60.8 °F 61% 30.06 in 10.0 mi South 8.1 mph - N/A   Overcast
2:50 PM 75.2 °F 62.6 °F 65% 30.05 in 10.0 mi South 9.2 mph - N/A   Overcast
3:50 PM 75.2 °F 62.6 °F 65% 30.03 in 10.0 mi South 5.8 mph - N/A   Overcast
4:50 PM 75.2 °F 62.6 °F 65% 30.01 in 10.0 mi South 5.8 mph - N/A   Overcast
5:50 PM 73.4 °F 64.4 °F 73% 30.01 in 10.0 mi South 6.9 mph - N/A   Overcast
6:50 PM 73.4 °F 64.4 °F 73% 30.01 in 10.0 mi South 6.9 mph - N/A   Overcast
7:50 PM 69.8 °F 64.4 °F 83% 30.01 in 10.0 mi Calm Calm - N/A   Overcast
8:50 PM 69.8 °F 64.4 °F 83% 30.01 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:50 PM 66.2 °F 64.4 °F 94% 30.01 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
10:15 PM 65.5 °F 62.6 °F 90% 30.01 in 1.8 mi Calm Calm - N/A   Mist
10:35 PM 66.6 °F 64.4 °F 93% 30.01 in 1.0 mi Calm Calm - N/A   Mist
10:55 PM 64.6 °F 61.9 °F 91% 30.01 in 1.8 mi Calm Calm - N/A   Mist
11:15 PM 63.3 °F 60.8 °F 91% 30.01 in 0.5 mi Calm Calm - N/A Fog Fog
11:35 PM 63.9 °F 61.7 °F 93% 30.00 in 1.5 mi Calm Calm - N/A   Mist
11:55 PM 61.2 °F 59.0 °F 93% 30.01 in 0.8 mi Calm Calm - N/A   Mist