Weather History for Mason City, IA

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 51 °F 35 °F 15 °F
Mean Temperature 40 °F 26 °F 5 °F
Min Temperature 35 °F 17 °F -5 °F
Degree Days  
Heating Degree Days (base 65) 60 39 25 1199
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 43 °F 21 °F -8 °F
Precipitation  
Precipitation 0.47 in 0.06 in 0.00 in 1.26 in
Snowdepth 4.0 in 1.1 in 0.0 in -
Wind  
Wind 35 mph 10 mph 0 mph
Gust Wind 43 mph 26 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.52 in 30.10 in 29.51 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 25, 2011 Rise Set
Actual Time 7:43 AM CST 4:43 PM CST
Civil Twilight 7:11 AM CST 5:15 PM CST
Nautical Twilight 6:35 AM CST 5:51 PM CST
Astronomical Twilight 6:00 AM CST 6:26 PM CST
Moon 8:20 AM CST (12/25) 6:06 PM CST (12/25)
Length of Visible Light 10h 04m
Length of Day
8h 59m
New Moon, 1% of the Moon is Illuminated
Dec 25
New Moon
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New

Weather History Calendar

Precipitation Actual month total 1.26 Normal Month Total: 1.24
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
34 | 14 T
Average:
33 | 16 0.05
Scattered Clouds
Actual:
36 | 4 T
Average:
33 | 16 0.05
Snow
Actual:
35 | 29 0.47
Average:
32 | 15 0.05
Snow
Actual:
29 | 20 T
Average:
32 | 15 0.04
Partly Cloudy
Actual:
21 | 9 T
Average:
31 | 14 0.05
Snow
Actual:
17 | -4 T
Average:
31 | 14 0.04
Partly Cloudy
Actual:
25 | 0 0.00
Average:
30 | 14 0.05
Partly Cloudy
Actual:
26 | 10 0.00
Average:
30 | 13 0.04
Clear
Actual:
15 | -5 0.00
Average:
30 | 13 0.05
Scattered Clouds
Actual:
28 | -4 0.00
Average:
29 | 13 0.04
Snow
Actual:
35 | 24 T
Average:
29 | 12 0.05
Overcast
Actual:
37 | 33 T
Average:
29 | 12 0.04
Rain
Actual:
37 | 33 0.09
Average:
28 | 12 0.04
Rain
Actual:
44 | 35 0.17
Average:
28 | 11 0.04
Partly Cloudy
Actual:
40 | 20 T
Average:
28 | 11 0.04
Snow
Actual:
31 | 11 T
Average:
27 | 11 0.04
Partly Cloudy
Actual:
37 | 22 0.00
Average:
27 | 10 0.04
Clear
Actual:
51 | 20 0.00
Average:
27 | 10 0.04
Partly Cloudy
Actual:
39 | 20 0.00
Average:
27 | 10 0.04
Fog
Actual:
31 | 14 0.00
Average:
26 | 10 0.03
Snow
Actual:
39 | 21 0.00
Average:
24 | 6 0.03
Snow
Actual:
30 | 9 0.04
Average:
26 | 9 0.04
Partly Cloudy
Actual:
33 | 8 0.00
Average:
26 | 9 0.04
Clear
Actual:
43 | 13 0.00
Average:
26 | 9 0.03
Clear
Actual:
43 | 19 0.00
Average:
25 | 9 0.04
Scattered Clouds
Actual:
48 | 19 0.00
Average:
25 | 9 0.03
Partly Cloudy
Actual:
41 | 20 0.00
Average:
25 | 9 0.04
Partly Cloudy
Actual:
42 | 19 T
Average:
25 | 8 0.03
Partly Cloudy
Actual:
40 | 30 T
Average:
25 | 8 0.03
Snow
Actual:
37 | 32 0.47
Average:
25 | 8 0.03
Snow
Actual:
45 | 33 0.02
Average:
25 | 8 0.03
 

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 34 24 14 28 22 9 85 72 58 30.49 30.31 30.07 10 9 2 23 12 29 T Snow
2 36 20 4 30 14 2 88 62 35 30.47 30.31 30.13 10 9 2 22 11 28 T  
3 35 32 29 34 30 26 96 93 89 30.13 30.03 29.90 4 2 0 22 9 25 0.47 Fog , Rain , Snow
4 29 25 20 25 19 15 92 85 77 30.38 30.17 29.94 10 9 2 22 12 26 T Snow
5 21 15 9 16 12 6 88 80 71 30.52 30.45 30.38 10 9 2 20 10 22 T  
6 17 7 -4 12 7 -7 95 87 79 30.46 30.33 30.17 10 8 2 14 7 16 T Snow
7 25 13 0 19 12 -1 84 76 67 30.17 30.10 30.03 10 10 9 21 10 26 0.00  
8 26 18 10 21 12 5 92 75 57 30.29 30.24 30.17 10 10 10 17 9 21 0.00  
9 15 5 -5 2 -3 -8 79 70 61 30.50 30.41 30.29 10 10 10 14 9 17 0.00  
10 28 12 -4 24 11 -8 88 78 68 30.49 30.36 30.25 10 8 5 21 12 26 0.00  
11 35 30 24 32 27 21 92 85 78 30.25 30.19 30.14 7 4 1 25 15 33 T Snow
12 37 35 33 32 32 30 96 86 76 30.32 30.23 30.15 10 8 4 15 7 20 T  
13 37 35 33 35 33 32 96 89 82 30.35 30.22 30.04 7 3 1 16 6 20 0.09 Rain
14 44 40 35 43 39 35 100 98 96 30.06 29.78 29.63 10 2 0 20 9 25 0.17 Fog , Rain
15 40 30 20 36 23 16 92 76 59 30.39 30.04 29.74 10 10 7 35 20 41 T  
16 31 21 11 25 18 9 88 71 53 30.45 30.37 30.27 10 9 2 13 4 16 T Snow
17 37 30 22 27 24 21 92 78 64 30.28 30.23 30.16 10 9 7 20 7 23 0.00  
18 51 36 20 37 30 19 96 74 52 30.19 29.95 29.80 10 10 9 24 13 31 0.00  
19 39 30 20 33 24 17 92 79 66 30.29 30.12 29.79 10 10 6 25 13 30 0.00  
20 31 23 14 26 19 11 92 81 69 30.28 29.98 29.75 10 7 0 9 2 10 0.00 Fog
21 39 30 21 28 24 19 100 87 60 30.01 29.77 29.66 10 4 0 17 7 24 0.00 Fog , Snow
22 30 20 9 27 16 5 85 73 60 30.40 30.25 30.00 10 10 3 20 12 23 0.04 Snow
23 33 21 8 21 15 4 84 72 59 30.40 30.23 30.09 10 10 10 32 10 39 0.00  
24 43 28 13 25 19 10 88 68 48 30.25 30.19 30.13 10 10 10 21 11 26 0.00  
25 43 31 19 27 21 18 84 65 45 30.35 30.26 30.12 10 10 10 24 13 30 0.00  
26 48 34 19 29 23 15 84 63 42 30.25 29.97 29.76 10 10 10 35 17 43 0.00  
27 41 31 20 31 23 15 81 69 56 30.08 29.90 29.73 10 10 10 31 17 38 0.00  
28 42 31 19 27 22 15 92 71 49 30.06 29.86 29.62 10 10 10 16 8 21 T  
29 40 35 30 31 28 24 92 78 64 29.68 29.61 29.52 10 10 5 22 11 28 T  
30 37 35 32 34 31 30 96 93 89 29.88 29.68 29.51 5 2 0 14 8 16 0.47 Fog , Rain , Snow
31 45 39 33 37 33 30 96 83 70 29.86 29.71 29.56 10 6 2 31 14 38 0.02 Snow