Weather History for Decatur, IL

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 44 °F 31 °F
Mean Temperature 51 °F 37 °F 23 °F
Min Temperature 44 °F 30 °F 15 °F
Degree Days  
Heating Degree Days (base 65) 42 28 14 857
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 1 0 0 1
Dew Point  
Dew Point 57 °F 32 °F 3 °F
Precipitation  
Precipitation 0.43 in 0.08 in 0.00 in 2.25 in
Snowdepth - - - -
Wind  
Wind 26 mph 10 mph 0 mph
Gust Wind 36 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.62 in 30.16 in 29.51 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 29, 2011 Rise Set
Actual Time 7:16 AM CST 4:38 PM CST
Civil Twilight 6:45 AM CST 5:09 PM CST
Nautical Twilight 6:11 AM CST 5:43 PM CST
Astronomical Twilight 5:39 AM CST 6:16 PM CST
Moon 10:10 AM CST 10:14 PM CST
Length of Visible Light 10h 23m
Length of Day
9h 22m
Waxing Crescent, 27% of the Moon is Illuminated
Dec 29
Waxing Crescent
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New

Weather History Calendar

Precipitation Actual month total 2.25 Normal Month Total: 2.54
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
48 | 27 0.00
Average:
44 | 28 0.08
Partly Cloudy
Actual:
43 | 30 0.00
Average:
43 | 27 0.09
Rain
Actual:
57 | 42 0.05
Average:
43 | 27 0.07
Rain
Actual:
54 | 34 0.17
Average:
42 | 26 0.08
Overcast
Actual:
37 | 32 T
Average:
42 | 26 0.09
Mostly Cloudy
Actual:
38 | 29 0.00
Average:
42 | 26 0.09
Partly Cloudy
Actual:
36 | 25 0.00
Average:
41 | 25 0.08
Partly Cloudy
Actual:
41 | 23 0.00
Average:
41 | 25 0.08
Snow
Actual:
35 | 20 T
Average:
40 | 24 0.08
Clear
Actual:
31 | 15 0.00
Average:
40 | 24 0.08
Clear
Actual:
44 | 24 0.00
Average:
40 | 24 0.08
Partly Cloudy
Actual:
47 | 23 0.00
Average:
39 | 24 0.07
Rain
Actual:
44 | 38 0.17
Average:
39 | 23 0.08
Rain
Actual:
58 | 44 0.43
Average:
39 | 23 0.07
Rain
Actual:
59 | 32 0.07
Average:
39 | 23 0.07
Scattered Clouds
Actual:
36 | 24 0.00
Average:
38 | 22 0.07
Partly Cloudy
Actual:
40 | 24 0.00
Average:
38 | 22 0.07
Scattered Clouds
Actual:
50 | 24 0.00
Average:
38 | 22 0.07
Rain
Actual:
51 | 42 0.40
Average:
38 | 22 0.07
Rain
Actual:
46 | 38 0.37
Average:
37 | 22 0.08
Rain
Actual:
45 | 32 0.01
Average:
37 | 21 0.09
Fog
Actual:
41 | 29 0.00
Average:
37 | 21 0.09
Partly Cloudy
Actual:
36 | 27 0.00
Average:
37 | 21 0.09
Clear
Actual:
40 | 23 0.00
Average:
37 | 21 0.09
Clear
Actual:
47 | 30 0.00
Average:
37 | 21 0.09
Rain
Actual:
43 | 22 0.15
Average:
36 | 21 0.09
Snow
Actual:
40 | 31 0.25
Average:
36 | 20 0.08
Partly Cloudy
Actual:
37 | 27 0.00
Average:
36 | 20 0.09
Scattered Clouds
Actual:
54 | 37 0.00
Average:
36 | 20 0.09
Rain
Actual:
48 | 38 0.18
Average:
36 | 20 0.10
Partly Cloudy
Actual:
50 | 37 0.00
Average:
36 | 20 0.09
 

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

2011 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  
1 48 38 27 34 29 23 89 73 56 30.32 30.28 30.23 10 10 10 13 6 16 0.00  
2 43 37 30 37 33 30 100 88 76 30.49 30.42 30.32 10 7 3 17 8 21 0.00  
3 57 50 42 43 39 37 82 67 51 30.34 30.20 29.99 10 10 9 21 13 28 0.05 Rain
4 54 44 34 52 43 32 93 84 74 30.28 30.10 29.94 10 9 5 23 12 31 0.17 Rain
5 37 35 32 34 31 28 96 89 82 30.29 30.25 30.20 10 8 6 21 14 24 T  
6 38 34 29 34 30 27 96 83 70 30.27 30.21 30.16 10 9 6 17 9 21 0.00  
7 36 31 25 31 24 15 100 72 44 30.20 30.14 30.11 10 8 2 17 9 21 0.00  
8 41 32 23 32 26 19 96 76 55 30.30 30.23 30.20 10 10 10 13 4 21 0.00  
9 35 28 20 31 23 5 92 67 42 30.53 30.32 30.20 10 7 2 17 10 23 T Snow
10 31 23 15 19 12 3 81 62 42 30.62 30.56 30.52 10 10 10 12 7 15 0.00  
11 44 34 24 27 23 18 85 69 53 30.53 30.47 30.40 10 10 10 16 9 21 0.00  
12 47 35 23 33 24 18 88 61 34 30.46 30.41 30.36 10 10 10 12 6 15 0.00  
13 44 41 38 44 39 33 100 85 70 30.46 30.38 30.25 10 5 1 13 6 17 0.17 Rain
14 58 51 44 56 50 44 100 97 93 30.24 30.00 29.78 10 7 3 25 16 32 0.43 Rain
15 59 46 32 57 43 24 93 79 64 30.32 29.95 29.75 10 10 3 25 16 35 0.07 Rain
16 36 30 24 25 24 21 92 77 61 30.45 30.38 30.31 10 10 7 16 6 22 0.00  
17 40 32 24 31 28 22 92 81 70 30.40 30.29 30.22 10 9 7 18 7 22 0.00  
18 50 37 24 37 32 24 92 77 61 30.29 30.18 30.01 10 10 8 22 11 29 0.00  
19 51 47 42 47 43 37 100 83 65 30.15 30.06 29.98 10 7 4 18 12 24 0.40 Rain
20 46 42 38 46 42 37 100 96 92 30.14 29.94 29.74 10 4 0 17 9 21 0.37 Fog , Rain
21 45 39 32 45 41 34 100 93 85 30.01 29.81 29.69 10 7 0 16 7 21 0.01 Fog , Rain
22 41 35 29 37 34 30 100 93 85 30.25 30.10 30.01 10 6 0 20 6 23 0.00 Fog
23 36 32 27 30 25 21 92 78 64 30.41 30.34 30.26 10 10 10 18 9 23 0.00  
24 40 32 23 30 26 19 92 76 59 30.42 30.35 30.29 10 10 10 17 9 21 0.00  
25 47 39 30 32 28 26 85 69 53 30.39 30.29 30.23 10 10 10 22 11 30 0.00  
26 43 33 22 36 30 20 100 81 62 30.38 30.18 29.90 10 9 5 18 7 23 0.15 Rain
27 40 36 31 36 33 27 100 85 70 30.04 29.78 29.65 10 6 2 24 12 33 0.25 Rain , Snow
28 37 32 27 32 28 25 89 80 70 30.12 30.03 29.87 10 10 10 17 8 22 0.00  
29 54 46 37 40 36 32 89 73 56 29.86 29.73 29.65 10 10 10 26 12 33 0.00  
30 48 43 38 45 41 37 100 88 76 29.88 29.64 29.51 10 9 4 26 16 36 0.18 Rain
31 50 44 37 43 39 36 100 86 71 30.06 29.92 29.68 10 9 7 24 13 32 0.00