Weather History for Rockford, IL

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 69 °F 40 °F 26 °F
Mean Temperature 57 °F 34 °F 20 °F
Min Temperature 44 °F 26 °F 8 °F
Degree Days  
Heating Degree Days (base 65) 45 31 8 972
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 8 0 0 12
Dew Point  
Dew Point 61 °F 28 °F 6 °F
Precipitation  
Precipitation 1.27 in 0.10 in 0.00 in 2.49 in
Snowdepth 1.0 in 0.2 in 0.0 in -
Wind  
Wind 33 mph 9 mph 0 mph
Gust Wind 45 mph 24 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.48 in 30.01 in 29.12 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 29, 2012 Rise Set
Actual Time 7:24 AM CST 4:32 PM CST
Civil Twilight 6:52 AM CST 5:04 PM CST
Nautical Twilight 6:17 AM CST 5:39 PM CST
Astronomical Twilight 5:43 AM CST 6:13 PM CST
Moon 6:07 PM CST (12/29) 7:56 AM CST (12/29)
Length of Visible Light 10h 11m
Length of Day
9h 08m
Full, 98% of the Moon is Illuminated
Dec 29
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Weather History Calendar

Precipitation Actual month total 2.49 Normal Month Total: 1.98
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
58 | 31 0.01
Average:
39 | 23 0.08
Fog
Actual:
64 | 44 0.00
Average:
38 | 23 0.08
Rain
Actual:
69 | 44 0.47
Average:
38 | 22 0.07
Partly Cloudy
Actual:
58 | 34 0.00
Average:
37 | 22 0.08
Partly Cloudy
Actual:
39 | 24 0.00
Average:
37 | 21 0.07
Rain
Actual:
46 | 32 0.01
Average:
36 | 21 0.08
Rain
Actual:
43 | 38 0.04
Average:
36 | 20 0.07
Snow
Actual:
39 | 33 0.01
Average:
35 | 20 0.08
Snow
Actual:
39 | 33 0.19
Average:
35 | 20 0.07
Snow
Actual:
34 | 29 T
Average:
35 | 19 0.07
Snow
Actual:
35 | 19 T
Average:
34 | 19 0.08
Scattered Clouds
Actual:
46 | 24 0.00
Average:
34 | 19 0.06
Partly Cloudy
Actual:
48 | 28 0.00
Average:
34 | 18 0.07
Partly Cloudy
Actual:
50 | 24 0.00
Average:
33 | 18 0.06
Rain
Actual:
48 | 41 0.36
Average:
33 | 18 0.07
Rain
Actual:
48 | 38 0.03
Average:
33 | 17 0.06
Overcast
Actual:
37 | 30 0.00
Average:
32 | 17 0.06
Snow
Actual:
39 | 30 T
Average:
32 | 17 0.06
Snow
Actual:
37 | 31 0.08
Average:
32 | 16 0.06
Snow
Actual:
41 | 30 1.27
Average:
32 | 16 0.06
Scattered Clouds
Actual:
30 | 15 0.00
Average:
31 | 16 0.06
Partly Cloudy
Actual:
29 | 10 0.00
Average:
31 | 16 0.06
Partly Cloudy
Actual:
27 | 14 0.00
Average:
31 | 16 0.05
Overcast
Actual:
31 | 20 0.00
Average:
31 | 15 0.06
Partly Cloudy
Actual:
26 | 13 0.00
Average:
31 | 15 0.06
Snow
Actual:
28 | 23 T
Average:
30 | 15 0.05
Snow
Actual:
30 | 24 T
Average:
30 | 15 0.05
Snow
Actual:
31 | 27 0.01
Average:
30 | 15 0.05
Snow
Actual:
30 | 13 0.01
Average:
30 | 15 0.05
Partly Cloudy
Actual:
34 | 8 0.00
Average:
30 | 14 0.05
Overcast
Actual:
35 | 17 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

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  
1 58 45 31 53 41 30 100 86 71 30.16 30.03 29.88 10 4 0 17 8 23 0.01 Fog , Rain
2 64 54 44 53 48 44 100 74 48 30.07 30.00 29.87 10 5 0 10 4 13 0.00 Fog
3 69 57 44 61 55 44 100 87 73 30.03 29.87 29.75 10 4 0 24 12 32 0.47 Fog , Rain
4 58 46 34 43 34 22 92 66 40 30.35 30.15 29.97 10 10 10 20 8 24 0.00  
5 39 32 24 27 21 15 85 67 48 30.48 30.37 30.23 10 10 10 16 8 21 0.00  
6 46 39 32 39 33 28 82 76 70 30.21 30.03 29.93 10 10 7 17 9 21 0.01 Rain
7 43 41 38 40 33 29 92 75 57 30.00 29.96 29.93 10 10 6 14 7 17 0.04 Rain
8 39 36 33 33 31 30 96 83 70 30.12 30.04 29.92 10 9 4 16 8 20 0.01 Rain , Snow
9 39 36 33 39 35 31 96 86 76 30.09 29.87 29.74 10 5 1 17 8 22 0.19 Rain , Snow
10 34 32 29 32 27 22 100 88 75 29.99 29.85 29.74 10 8 5 22 12 28 T Snow
11 35 27 19 25 20 16 92 73 53 30.17 30.03 29.95 10 10 7 20 10 24 T Snow
12 46 35 24 28 24 19 81 63 45 30.29 30.24 30.17 10 10 10 21 11 28 0.00  
13 48 38 28 28 26 23 85 64 42 30.26 30.19 30.10 10 10 10 23 11 28 0.00  
14 50 37 24 35 29 22 92 71 50 30.22 30.13 30.01 10 10 8 13 6 16 0.00  
15 48 45 41 47 42 34 100 85 70 29.99 29.69 29.55 10 6 1 24 12 33 0.36 Rain
16 48 43 38 45 37 33 92 86 79 29.76 29.67 29.57 10 9 6 17 12 23 0.03 Rain
17 37 34 30 32 28 25 89 82 75 29.78 29.75 29.71 10 8 5 10 4 13 0.00  
18 39 35 30 36 30 26 96 89 82 29.90 29.72 29.57 8 5 4 18 7 22 T Snow
19 37 34 31 35 30 28 92 84 75 30.07 29.99 29.80 9 6 3 17 6 23 0.08 Rain , Snow
20 41 36 30 40 34 24 100 93 85 29.73 29.40 29.12 9 3 0 33 21 45 1.27 Fog , Rain , Snow
21 30 23 15 23 14 9 84 73 62 30.25 30.03 29.67 10 10 9 31 15 41 0.00  
22 29 20 10 21 14 7 92 81 69 30.27 30.15 29.99 10 10 7 14 4 16 0.00  
23 27 21 14 22 18 10 92 84 75 30.10 30.04 29.97 10 9 5 20 8 23 0.00  
24 31 26 20 25 21 14 88 83 77 30.18 30.01 29.92 10 10 9 15 9 18 0.00  
25 26 20 13 18 14 11 88 78 68 30.39 30.32 30.19 10 10 10 17 10 20 0.00  
26 28 26 23 22 20 18 88 79 69 30.25 30.16 30.06 10 10 10 23 14 29 T Snow
27 30 27 24 23 21 18 81 78 74 30.24 30.18 30.12 10 10 10 16 8 22 T Snow
28 31 29 27 29 27 22 92 85 78 30.14 30.00 29.90 10 5 1 12 4 13 0.01 Rain , Snow
29 30 22 13 28 19 10 92 83 73 30.27 30.07 29.90 10 8 2 21 12 25 0.01 Snow
30 34 21 8 25 16 6 92 80 68 30.37 30.26 30.06 10 8 6 20 8 25 0.00  
31 35 26 17 25 18 8 84 72 59 30.21 30.10 30.01 10 10 7 20 10 26 0.00