Weather History for Decatur, IL

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 22 °C 7 °C -2 °C
Mean Temperature 18 °C 3 °C -4 °C
Min Temperature 14 °C -1 °C -10 °C
Degree Days  
Heating Degree Days (base 65) 41 27 0 828
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 14 1 0 22
Dew Point  
Dew Point 17 °C 1 °C -12 °C
Precipitation  
Precipitation 18.3 mm 1.9 mm 0.0 mm 57.90 mm
Snowdepth - - - -
Wind  
Wind 64 km/h 17 km/h 0 km/h
Gust Wind 93 km/h 41 km/h 27 km/h
Sea Level Pressure  
Sea Level Pressure 1030 hPa 1016 hPa 988 hPa

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 09, 2012 Rise Set
Actual Time 7:05 AM CST 4:30 PM CST
Civil Twilight 6:35 AM CST 5:00 PM CST
Nautical Twilight 6:01 AM CST 5:34 PM CST
Astronomical Twilight 5:28 AM CST 6:07 PM CST
Moon 2:38 AM CST (12/9) 1:37 PM CST (12/9)
Length of Visible Light 10h 25m
Length of Day
9h 25m
Waning Crescent, 18% of the Moon is Illuminated
Dec 9
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 57.90 Normal Month Total: 6.5
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
17 | 2 0.00
Average:
7 | -2 2.03
Rain
Actual:
19 | 10 2.79
Average:
6 | -3 2.29
Partly Cloudy
Actual:
22 | 14 0.00
Average:
6 | -3 1.78
Rain
Actual:
17 | 3 6.86
Average:
6 | -3 2.03
Clear
Actual:
8 | -1 0.00
Average:
6 | -3 2.29
Rain
Actual:
11 | 0 0.25
Average:
6 | -3 2.29
Rain
Actual:
9 | 7 5.59
Average:
5 | -4 2.03
Rain
Actual:
8 | 4 0.25
Average:
5 | -4 2.03
Rain
Actual:
10 | 4 6.60
Average:
4 | -4 2.03
Mostly Cloudy
Actual:
4 | -3 0.00
Average:
4 | -4 2.03
Clear
Actual:
2 | -7 0.00
Average:
4 | -4 2.03
Clear
Actual:
7 | -5 0.00
Average:
4 | -4 1.78
Clear
Actual:
9 | -2 0.00
Average:
4 | -5 2.03
Scattered Clouds
Actual:
12 | -1 0.00
Average:
4 | -5 1.78
Rain
Actual:
12 | 6 8.38
Average:
4 | -5 1.78
Overcast
Actual:
10 | 4 0.00
Average:
3 | -6 1.78
Rain
Actual:
4 | 1 1.27
Average:
3 | -6 1.78
Partly Cloudy
Actual:
10 | 1 0.00
Average:
3 | -6 1.78
Thunderstorm
Actual:
8 | 1 5.84
Average:
3 | -6 1.78
Snow
Actual:
13 | -4 18.29
Average:
3 | -6 2.03
Scattered Clouds
Actual:
-2 | -7 0.00
Average:
3 | -6 2.29
Clear
Actual:
3 | -10 0.00
Average:
3 | -6 2.29
Clear
Actual:
4 | -2 0.00
Average:
3 | -6 2.29
Mostly Cloudy
Actual:
1 | -4 0.00
Average:
3 | -6 2.29
Overcast
Actual:
1 | -4 0.00
Average:
3 | -6 2.29
Overcast
Actual:
1 | -2 0.00
Average:
2 | -6 2.29
Overcast
Actual:
-1 | -2 0.00
Average:
2 | -7 2.03
Overcast
Actual:
1 | -2 0.00
Average:
2 | -7 2.29
Snow
Actual:
0 | -8 T
Average:
2 | -7 2.29
Clear
Actual:
3 | -9 0.00
Average:
2 | -7 2.54
Snow
Actual:
2 | -4 1.78
Average:
2 | -7 2.29
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2012 Temp. (°C) Dew Point (°C) Humidity (%) Sea Level Press. (hPa) Visibility (km) Wind (km/h) Precip. (mm) Events
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 17 10 2 12 9 2 100 84 67 1020 1018 1014 16 12 4 37 21 50 0.00  
2 19 15 10 15 13 10 100 85 69 1018 1016 1014 16 13 5 35 15 47 2.79 Rain
3 22 18 14 17 15 14 100 83 66 1017 1014 1011 16 12 6 52 28 63 0.00  
4 17 10 3 13 8 2 100 80 59 1026 1020 1013 16 14 8 29 14 40 6.86 Rain
5 8 4 -1 2 1 -2 100 83 65 1030 1027 1023 16 16 16 21 11 26 0.00  
6 11 6 0 7 3 -1 96 84 71 1022 1018 1014 16 16 14 23 10 26 0.25 Rain
7 9 8 7 9 8 7 100 100 100 1014 1012 1010 13 4 1 19 8 29 5.59 Fog , Rain
8 8 6 4 8 6 3 100 91 82 1017 1014 1010 16 8 0 26 12 32 0.25 Fog , Rain
9 10 7 4 9 6 3 100 93 86 1016 1011 1008 16 9 2 34 17 47 6.60 Rain
10 4 1 -3 2 -4 -6 92 84 75 1017 1013 1009 16 16 13 35 19 45 0.00  
11 2 -2 -7 -4 -6 -8 92 72 52 1024 1020 1018 16 16 16 34 14 40 0.00  
12 7 1 -5 -2 -3 -7 88 71 53 1028 1026 1024 16 16 16 24 12 29 0.00  
13 9 4 -2 -1 -3 -4 78 62 46 1028 1026 1022 16 16 16 35 20 42 0.00  
14 12 6 -1 4 1 -3 92 73 54 1024 1021 1017 16 16 16 23 13 29 0.00  
15 12 9 6 11 8 2 100 83 65 1016 1007 1003 16 14 4 45 24 60 8.38 Rain
16 10 7 4 9 5 2 100 91 82 1008 1006 1005 16 16 14 29 14 35 0.00  
17 4 3 1 3 2 2 100 93 85 1009 1006 1004 16 10 5 16 8 21 1.27 Rain
18 10 6 1 4 2 0 100 83 66 1013 1008 1003 16 13 10 45 20 58 0.00  
19 8 4 1 7 3 0 100 91 82 1018 1013 1003 16 12 8 37 18 48 5.84 Rain , Thunderstorm
20 13 4 -4 11 3 -7 100 88 76 1008 994 988 16 10 1 64 40 93 18.29 Rain , Snow
21 -2 -4 -7 -7 -9 -11 84 71 58 1026 1019 1009 16 16 16 52 29 71 0.00  
22 3 -3 -10 -3 -8 -12 88 71 54 1026 1022 1013 16 16 16 24 10 29 0.00  
23 4 0 -2 -1 -2 -3 92 78 64 1016 1014 1013 16 14 8 19 9 - 0.00  
24 1 -2 -4 -2 -4 -7 92 84 75 1021 1014 1009 14 9 5 35 17 52 0.00  
25 1 -2 -4 -3 -4 -7 88 79 69 1026 1022 1018 16 14 8 39 22 48 0.00  
26 1 0 -2 -4 -5 -6 78 71 64 1020 1016 1013 16 16 16 48 31 64 0.00  
27 -1 -1 -2 -5 -6 -7 78 71 63 1023 1021 1020 16 16 16 23 10 26 0.00  
28 1 0 -2 -2 -3 -6 85 80 75 1020 1015 1012 16 13 8 19 10 - 0.00  
29 0 -4 -8 -2 -7 -11 92 78 63 1027 1019 1011 16 11 5 37 20 47 T Snow
30 3 -3 -9 -4 -7 -11 84 72 59 1030 1027 1023 16 14 8 29 17 39 0.00  
31 2 -1 -4 -1 -3 -7 92 76 59 1022 1020 1019 16 7 0 35 15 42 1.78 Fog , Snow