Weather History for Rockford, IL

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 56 °F 40 °F 26 °F
Mean Temperature 46 °F 33 °F 18 °F
Min Temperature 38 °F 25 °F 10 °F
Degree Days  
Heating Degree Days (base 65) 47 32 19 1000
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 53 °F 26 °F 2 °F
Precipitation  
Precipitation 0.73 in 0.09 in 0.00 in 2.06 in
Snowdepth 2.0 in 2.0 in 2.0 in -
Wind  
Wind 29 mph 8 mph 0 mph
Gust Wind 38 mph 23 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.56 in 30.13 in 29.45 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 09, 2011 Rise Set
Actual Time 7:13 AM CST 4:24 PM CST
Civil Twilight 6:41 AM CST 4:55 PM CST
Nautical Twilight 6:06 AM CST 5:31 PM CST
Astronomical Twilight 5:32 AM CST 6:04 PM CST
Moon 3:47 PM CST (12/9) 6:20 AM CST (12/9)
Length of Visible Light 10h 14m
Length of Day
9h 11m
Waxing Gibbous, 99% of the Moon is Illuminated
Dec 9
Waxing Gibbous
Dec 10
Full
Dec 17
Last Quarter
Dec 24
New
Jan 1
First Quarter

Weather History Calendar

Precipitation Actual month total 2.06 Normal Month Total: 1.98
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
41 | 27 0.05
Average:
39 | 23 0.08
Snow
Actual:
36 | 23 T
Average:
38 | 23 0.08
Rain
Actual:
48 | 35 0.73
Average:
38 | 22 0.07
Rain
Actual:
51 | 33 0.02
Average:
37 | 22 0.08
Snow
Actual:
37 | 32 T
Average:
37 | 21 0.07
Overcast
Actual:
32 | 28 0.00
Average:
36 | 21 0.08
Partly Cloudy
Actual:
33 | 21 0.00
Average:
36 | 20 0.07
Snow
Actual:
34 | 22 T
Average:
35 | 20 0.08
Snow
Actual:
27 | 13 0.01
Average:
35 | 20 0.07
Scattered Clouds
Actual:
26 | 10 0.00
Average:
35 | 19 0.07
Clear
Actual:
43 | 21 0.00
Average:
34 | 19 0.08
Partly Cloudy
Actual:
45 | 27 0.00
Average:
34 | 19 0.06
Rain
Actual:
44 | 36 0.08
Average:
34 | 18 0.07
Rain
Actual:
54 | 38 0.65
Average:
33 | 18 0.06
Overcast
Actual:
56 | 29 0.03
Average:
33 | 18 0.07
Partly Cloudy
Actual:
34 | 20 0.00
Average:
33 | 17 0.06
Snow
Actual:
31 | 23 0.09
Average:
32 | 17 0.06
Fog
Actual:
42 | 17 0.00
Average:
32 | 17 0.06
Partly Cloudy
Actual:
47 | 35 0.00
Average:
32 | 16 0.06
Snow
Actual:
39 | 31 0.05
Average:
32 | 16 0.06
Rain
Actual:
39 | 32 0.03
Average:
31 | 16 0.06
Mostly Cloudy
Actual:
36 | 25 T
Average:
31 | 16 0.06
Snow
Actual:
31 | 18 T
Average:
31 | 16 0.05
Scattered Clouds
Actual:
38 | 19 0.00
Average:
31 | 15 0.06
Scattered Clouds
Actual:
44 | 24 0.00
Average:
31 | 15 0.06
Rain
Actual:
44 | 21 T
Average:
30 | 15 0.05
Partly Cloudy
Actual:
41 | 24 0.00
Average:
30 | 15 0.05
Partly Cloudy
Actual:
31 | 19 0.00
Average:
30 | 15 0.05
Rain
Actual:
47 | 29 T
Average:
30 | 15 0.05
Snow
Actual:
41 | 31 0.32
Average:
30 | 14 0.05
Fog
Actual:
40 | 24 0.00
Average:
30 | 14 0.05
 

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 41 34 27 31 26 20 89 72 54 30.37 30.28 30.17 10 8 2 13 5 15 0.05 Rain , Snow
2 36 30 23 32 26 19 92 84 75 30.50 30.41 30.32 10 9 3 15 7 23 T Snow
3 48 42 35 44 40 32 96 89 82 30.30 30.15 29.85 10 6 2 26 13 33 0.73 Rain
4 51 42 33 47 36 28 92 84 75 30.30 30.03 29.84 10 10 8 24 11 35 0.02 Rain
5 37 35 32 31 29 26 89 80 70 30.37 30.32 30.26 10 8 3 18 9 23 T Rain , Snow
6 32 30 28 25 18 12 78 62 45 30.35 30.28 30.17 10 10 10 18 8 22 0.00  
7 33 27 21 23 18 12 84 68 51 30.17 30.10 30.00 10 10 10 17 9 23 0.00  
8 34 28 22 23 21 18 81 71 61 30.27 30.21 30.16 10 9 2 18 6 22 T Snow
9 27 20 13 18 8 3 77 57 37 30.50 30.36 30.23 10 10 6 16 8 21 0.01 Snow
10 26 18 10 16 7 2 77 57 36 30.56 30.48 30.41 10 10 10 15 8 18 0.00  
11 43 32 21 30 24 17 92 75 57 30.44 30.38 30.34 10 9 6 17 10 22 0.00  
12 45 36 27 29 26 23 92 73 53 30.40 30.37 30.34 10 10 7 12 7 15 0.00  
13 44 40 36 37 32 27 92 77 62 30.42 30.34 30.22 10 8 2 10 4 13 0.08 Rain
14 54 46 38 52 44 37 100 93 86 30.19 29.90 29.65 10 5 1 18 12 24 0.65 Rain
15 56 43 29 53 34 21 93 76 59 30.30 29.88 29.64 10 10 10 29 17 38 0.03  
16 34 27 20 23 19 15 84 68 51 30.44 30.38 30.30 10 10 10 13 4 16 0.00  
17 31 27 23 27 24 21 92 85 78 30.37 30.26 30.18 10 5 1 12 4 13 0.09 Snow
18 42 30 17 34 22 12 92 83 73 30.25 30.14 29.89 10 5 0 17 8 22 0.00 Fog
19 47 41 35 36 32 25 79 72 64 30.23 30.04 29.86 10 10 10 18 9 23 0.00  
20 39 35 31 34 29 24 92 78 64 30.22 30.00 29.79 10 8 2 12 6 14 0.05 Snow
21 39 36 32 36 33 30 100 91 82 29.96 29.79 29.68 10 6 0 15 5 17 0.03 Fog , Rain
22 36 31 25 32 28 16 96 81 66 30.33 30.13 29.97 10 8 5 20 10 24 T  
23 31 25 18 21 17 13 81 67 53 30.39 30.31 30.23 10 10 10 20 8 23 T Snow
24 38 29 19 27 22 16 91 75 59 30.33 30.26 30.15 10 10 8 20 8 23 0.00  
25 44 34 24 26 24 21 81 63 45 30.34 30.21 30.09 10 10 10 24 9 30 0.00  
26 44 33 21 29 25 19 92 71 49 30.34 30.13 29.85 10 10 10 25 11 32 T Rain
27 41 33 24 30 25 15 89 73 56 30.06 29.79 29.64 10 10 10 24 11 33 0.00  
28 31 25 19 26 17 11 92 75 58 30.12 30.01 29.81 10 10 10 12 6 20 0.00  
29 47 38 29 31 29 27 92 73 53 29.76 29.65 29.53 10 10 8 21 9 26 T Rain
30 41 36 31 39 34 28 100 91 82 29.88 29.63 29.45 10 6 2 20 11 25 0.32 Rain , Snow
31 40 32 24 36 30 23 100 93 85 30.02 29.90 29.62 10 4 0 21 10 33 0.00 Fog