Weather History for Alton, IL

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Tuesday, December 4, 2012

  Actual Average Record
Temperature  
Mean Temperature 52 °F -  
Max Temperature 65 °F 45 °F 68 °F (1999)
Min Temperature 39 °F 31 °F 15 °F (2006)
Degree Days  
Heating Degree Days 13    
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 47 °F    
Average Humidity 79    
Maximum Humidity 94    
Minimum Humidity 48    
Precipitation  
Precipitation 0.10 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.12 in    
Wind  
Wind Speed 8 mph (NW)    
Max Wind Speed 15 mph    
Max Gust Speed 18 mph    
Visibility 9 miles    
Events Rain    
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

Dec. 04, 2012 Rise Set
Actual Time 7:03 AM CST 4:38 PM CST
Civil Twilight 6:33 AM CST 5:07 PM CST
Nautical Twilight 6:00 AM CST 5:40 PM CST
Astronomical Twilight 5:28 AM CST 6:13 PM CST
Moon 10:23 PM CST (12/4) 10:59 AM CST (12/4)
Length of Visible Light 10h 34m
Length of Day
9h 34m
Waning Gibbous, 69% of the Moon is Illuminated
Dec 4
Waning Gibbous
Dec 6
Last Quarter
Dec 13
New
Dec 19
First Quarter
Dec 28
Full

Hourly Weather History & Observations

Time (CST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 64.4 °F 56.3 °F 75% 29.95 in 10.0 mi South 9.2 mph - N/A   Clear
12:35 AM 64.4 °F 56.1 °F 74% 29.94 in 10.0 mi South 11.5 mph 16.1 mph N/A   Scattered Clouds
12:55 AM 64.4 °F 56.3 °F 75% 29.94 in 10.0 mi South 11.5 mph - N/A   Mostly Cloudy
1:15 AM 64.8 °F 56.7 °F 75% 29.94 in 10.0 mi South 10.4 mph - N/A   Overcast
1:35 AM 65.3 °F 57.2 °F 75% 29.96 in 10.0 mi West 15.0 mph 18.4 mph N/A   Overcast
1:55 AM 64.9 °F 56.7 °F 74% 29.97 in 10.0 mi WNW 10.4 mph - N/A   Overcast
2:15 AM 62.6 °F 55.8 °F 78% 29.98 in 10.0 mi NNW 5.8 mph - N/A   Overcast
2:35 AM 61.0 °F 54.9 °F 80% 29.99 in 10.0 mi NW 8.1 mph - N/A   Overcast
2:55 AM 59.5 °F 54.7 °F 84% 30.00 in 7.0 mi NW 5.8 mph - N/A Rain Rain
3:15 AM 58.3 °F 54.3 °F 87% 30.01 in 5.0 mi NW 6.9 mph - 0.01 in Rain Rain
3:35 AM 57.0 °F 53.6 °F 88% 30.02 in 5.0 mi NW 5.8 mph - 0.04 in Rain Rain
3:55 AM 56.3 °F 53.1 °F 89% 30.02 in 5.0 mi NNW 6.9 mph - 0.07 in Rain Rain
4:15 AM 55.9 °F 52.7 °F 89% 30.02 in 5.0 mi North 4.6 mph - N/A Rain Light Rain
4:35 AM 55.8 °F 52.5 °F 89% 30.03 in 7.0 mi NW 8.1 mph - 0.01 in Rain Rain
4:55 AM 54.7 °F 51.4 °F 89% 30.04 in 7.0 mi NW 4.6 mph - 0.01 in   Drizzle
5:15 AM 53.6 °F 50.2 °F 88% 30.04 in 10.0 mi NNW 8.1 mph - N/A Rain Light Rain
5:35 AM 53.6 °F 50.0 °F 88% 30.06 in 7.0 mi NNW 8.1 mph - 0.01 in Rain Light Rain
5:55 AM 53.2 °F 50.0 °F 89% 30.07 in 7.0 mi North 6.9 mph - 0.02 in Rain Light Rain
6:50 AM 51.8 °F 50.0 °F 94% 30.10 in 7.0 mi NNW 8.1 mph - N/A Rain Light Rain
7:50 AM 51.8 °F 48.2 °F 88% 30.12 in 10.0 mi NNW 9.2 mph - N/A   Overcast
8:50 AM 53.6 °F 48.2 °F 82% 30.14 in 10.0 mi NNW 11.5 mph - N/A   Overcast
9:50 AM 53.6 °F 44.6 °F 72% 30.17 in 10.0 mi NNW 11.5 mph - N/A   Overcast
10:50 AM 55.4 °F 42.8 °F 63% 30.17 in 10.0 mi North 9.2 mph - N/A   Mostly Cloudy
11:50 AM 55.4 °F 41.0 °F 58% 30.16 in 10.0 mi NNW 13.8 mph - N/A   Mostly Cloudy
12:50 PM 57.2 °F 39.2 °F 51% 30.16 in 10.0 mi NNW 13.8 mph - N/A   Mostly Cloudy
1:50 PM 59.0 °F 39.2 °F 48% 30.17 in 10.0 mi NW 11.5 mph - N/A   Mostly Cloudy
2:50 PM 57.2 °F 39.2 °F 51% 30.20 in 10.0 mi SW 11.5 mph - N/A   Mostly Cloudy
3:50 PM 57.2 °F 39.2 °F 51% 30.22 in 10.0 mi NNW 9.2 mph - N/A   Mostly Cloudy
4:50 PM 53.6 °F 39.2 °F 58% 30.24 in 10.0 mi NW 5.8 mph - N/A   Mostly Cloudy
9:15 PM 42.1 °F 38.3 °F 86% 30.29 in 10.0 mi Calm Calm - N/A   Clear
9:35 PM 41.5 °F 37.0 °F 84% 30.29 in 10.0 mi Calm Calm - N/A   Clear
9:55 PM 41.9 °F 38.3 °F 87% 30.29 in 10.0 mi Calm Calm - N/A   Clear
10:15 PM 41.2 °F 37.4 °F 86% 30.29 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 41.2 °F 37.8 °F 88% 30.29 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 40.6 °F 37.6 °F 89% 30.29 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 41.9 °F 38.5 °F 88% 30.29 in 10.0 mi Calm Calm - N/A   Clear
11:35 PM 39.9 °F 37.4 °F 91% 30.30 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 40.3 °F 37.6 °F 90% 30.30 in 10.0 mi Calm Calm - N/A   Clear