Weather History for Alton, IL

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Monday, February 18, 2013

  Actual Average Record
Temperature  
Mean Temperature 47 °F -  
Max Temperature 59 °F 43 °F 66 °F (1997)
Min Temperature 35 °F 29 °F 5 °F (2006)
Degree Days  
Heating Degree Days 18    
Moisture  
Dew Point 33 °F    
Average Humidity 68    
Maximum Humidity 83    
Minimum Humidity 59    
Precipitation  
Precipitation 0.05 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.82 in    
Wind  
Wind Speed 14 mph (South)    
Max Wind Speed 29 mph    
Max Gust Speed 38 mph    
Visibility 10 miles    
Events Rain , Thunderstorm    
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

Feb. 18, 2013 Rise Set
Actual Time 6:47 AM CST 5:41 PM CST
Civil Twilight 6:20 AM CST 6:08 PM CST
Nautical Twilight 5:49 AM CST 6:39 PM CST
Astronomical Twilight 5:18 AM CST 7:10 PM CST
Moon 11:28 AM CST 1:25 AM CST
Length of Visible Light 11h 48m
Length of Day
10h 54m
First Quarter, 58% of the Moon is Illuminated
Feb 18
First Quarter
Feb 25
Full
Mar 4
Last Quarter
Mar 11
New
Mar 19
First Quarter

Hourly Weather History & Observations

Time (CST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 38.7 °F 31.4 °F 25.3 °F 59% 29.93 in 10.0 mi SE 11.5 mph - N/A   Clear
12:55 AM 38.5 °F 32.1 °F 25.2 °F 59% 29.92 in 10.0 mi SE 9.2 mph - N/A   Clear
1:15 AM 38.3 °F 31.9 °F 25.2 °F 59% 29.91 in 10.0 mi SE 9.2 mph - N/A   Clear
1:35 AM 38.3 °F 31.9 °F 25.7 °F 61% 29.91 in 10.0 mi SE 9.2 mph - N/A   Clear
1:55 AM 38.3 °F 31.4 °F 25.9 °F 61% 29.90 in 10.0 mi SE 10.4 mph - N/A   Clear
2:15 AM 37.9 °F 30.9 °F 26.4 °F 63% 29.89 in 10.0 mi SE 10.4 mph - N/A   Clear
2:35 AM 37.8 °F 30.7 °F 26.6 °F 64% 29.88 in 10.0 mi SE 10.4 mph - N/A   Clear
2:55 AM 38.3 °F 30.9 °F 27.5 °F 65% 29.87 in 10.0 mi SE 11.5 mph - N/A   Clear
3:15 AM 38.3 °F 31.4 °F 27.9 °F 66% 29.86 in 10.0 mi SE 10.4 mph - N/A   Clear
3:35 AM 38.3 °F 31.4 °F 28.4 °F 68% 29.86 in 10.0 mi SE 10.4 mph - N/A   Clear
3:55 AM 38.5 °F 31.6 °F 29.5 °F 70% 29.85 in 10.0 mi SE 10.4 mph - N/A   Clear
4:15 AM 38.5 °F 32.1 °F 30.2 °F 72% 29.85 in 10.0 mi SE 9.2 mph - N/A   Clear
4:35 AM 38.3 °F 31.9 °F 30.9 °F 75% 29.84 in 10.0 mi SE 9.2 mph - N/A   Clear
4:55 AM 38.1 °F 32.9 °F 31.1 °F 76% 29.84 in 10.0 mi SE 6.9 mph - N/A   Clear
5:15 AM 40.1 °F 34.1 °F 32.2 °F 73% 29.83 in 10.0 mi SSE 9.2 mph - N/A   Clear
5:35 AM 43.7 °F 38.1 °F 34.0 °F 69% 29.83 in 10.0 mi SSE 10.4 mph - N/A   Clear
6:50 AM 44.6 °F 37.4 °F 35.6 °F 71% 29.81 in 10.0 mi South 16.1 mph - N/A   Mostly Cloudy
7:50 AM 46.4 °F 39.2 °F 37.4 °F 71% 29.80 in 10.0 mi South 18.4 mph 28.8 mph N/A   Overcast
8:50 AM 50.0 °F - 39.2 °F 66% 29.79 in 10.0 mi South 18.4 mph 32.2 mph N/A   Overcast
9:50 AM 57.2 °F - 42.8 °F 59% 29.77 in 10.0 mi South 20.7 mph 33.4 mph N/A   Mostly Cloudy
10:50 AM 57.2 °F - 42.8 °F 59% 29.78 in 10.0 mi South 23.0 mph 38.0 mph N/A   Overcast
11:50 AM 59.0 °F - 44.6 °F 59% 29.75 in 10.0 mi South 25.3 mph 38.0 mph N/A   Overcast
12:50 PM 57.2 °F - 44.6 °F 63% 29.71 in 10.0 mi South 27.6 mph 35.7 mph N/A   Overcast
1:50 PM 55.4 °F - 44.6 °F 67% 29.68 in 10.0 mi South 23.0 mph 32.2 mph N/A   Overcast
2:50 PM 55.4 °F - 46.4 °F 72% 29.65 in 10.0 mi South 23.0 mph 34.5 mph N/A   Overcast
3:50 PM 51.8 °F - 46.4 °F 82% 29.61 in 6.0 mi South 23.0 mph 34.5 mph N/A Rain Light Rain
9:15 PM 41.2 °F 33.7 °F 36.5 °F 83% 29.77 in 10.0 mi WNW 13.8 mph 23.0 mph N/A   Overcast
9:35 PM 41.0 °F 31.1 °F 35.1 °F 79% 29.79 in 10.0 mi WNW 23.0 mph 32.2 mph N/A   Overcast
9:55 PM 40.1 °F 30.7 °F 33.8 °F 78% 29.81 in 10.0 mi WNW 19.6 mph 27.6 mph N/A   Overcast
10:15 PM 39.2 °F 28.7 °F 32.0 °F 75% 29.82 in 10.0 mi West 23.0 mph 34.5 mph N/A   Overcast
10:35 PM 37.6 °F 25.6 °F 30.2 °F 75% 29.83 in 10.0 mi West 27.6 mph 36.8 mph N/A   Overcast
10:55 PM 37.0 °F 24.7 °F 28.2 °F 70% 29.85 in 10.0 mi WNW 28.8 mph 38.0 mph N/A   Overcast
11:15 PM 36.0 °F 24.4 °F 25.7 °F 66% 29.86 in 10.0 mi WNW 23.0 mph 35.7 mph N/A Thunderstorm Thunderstorm
11:35 PM 35.8 °F 25.1 °F 26.1 °F 68% 29.88 in 10.0 mi West 19.6 mph 25.3 mph N/A Thunderstorm Thunderstorm
11:55 PM 35.8 °F 26.5 °F 26.6 °F 69% 29.89 in 10.0 mi West 15.0 mph 26.5 mph N/A Thunderstorm Thunderstorm