Weather History for Alton, IL

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Week of December 9, 2012 through December 15, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 62 °F 51 °F 40 °F
Mean Temperature 54 °F 41 °F 32 °F
Min Temperature 45 °F 31 °F 23 °F
Degree Days  
Heating Degree Days (base 65) 32 24 12 166
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 4 1 0 4
Dew Point  
Dew Point 52 °F 31 °F 14 °F
Precipitation  
Precipitation 0.27 in 0.07 in 0.00 in 0.48 in
Snowdepth - - - -
Wind  
Wind 24 mph 7 mph 0 mph
Gust Wind 34 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.34 in 30.06 in 29.60 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Dec. 12, 2012 Rise Set
Actual Time 7:09 AM CST 4:38 PM CST
Civil Twilight 6:39 AM CST 5:08 PM CST
Nautical Twilight 6:06 AM CST 5:41 PM CST
Astronomical Twilight 5:34 AM CST 6:14 PM CST
Moon 6:14 AM CST (12/12) 4:15 PM CST (12/12)
Length of Visible Light 10h 28m
Length of Day
9h 28m
Waning Crescent, 1% of the Moon is Illuminated
Dec 12
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
9 51 46 40 50 43 33 94 86 75 29.96 29.86 29.77 10 5 0 21 5 26 0.19 Fog , Rain
10 40 35 30 33 26 23 78 74 64 30.06 29.95 29.87 10 10 10 20 14 25 0.00  
11 42 32 23 25 21 14 86 71 31 30.23 30.13 30.07 10 10 10 17 6 - 0.00  
12 50 36 23 27 23 18 93 69 28 30.34 30.28 30.23 10 10 10 13 3 - 0.00  
13 55 41 27 39 26 19 89 69 25 30.33 30.28 30.19 10 10 10 23 6 21 0.00  
14 57 44 31 40 31 25 89 70 31 30.23 30.16 29.99 10 10 7 14 5 - 0.02 Rain
15 62 54 45 52 46 38 90 83 63 29.97 29.78 29.60 10 9 4 24 11 34 0.27 Rain