Weather History for Mason City, IA

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 63 °F 33 °F 8 °F
Mean Temperature 49 °F 24 °F 2 °F
Min Temperature 34 °F 15 °F -4 °F
Degree Days  
Heating Degree Days (base 65) 63 41 16 1269
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 55 °F 18 °F -9 °F
Precipitation  
Precipitation 0.80 in 0.06 in 0.00 in 1.30 in
Snowdepth 6.0 in 2.1 in 0.0 in -
Wind  
Wind 41 mph 11 mph 0 mph
Gust Wind 48 mph 25 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.52 in 30.00 in 29.47 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 25, 2012 Rise Set
Actual Time 7:43 AM CST 4:43 PM CST
Civil Twilight 7:11 AM CST 5:16 PM CST
Nautical Twilight 6:35 AM CST 5:52 PM CST
Astronomical Twilight 6:00 AM CST 6:26 PM CST
Moon 2:53 PM CST (12/25) 5:15 AM CST (12/25)
Length of Visible Light 10h 04m
Length of Day
8h 59m
Waxing Gibbous, 94% of the Moon is Illuminated
Dec 25
Waxing Gibbous
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

Weather History Calendar

Precipitation Actual month total 1.30 Normal Month Total: 1.24
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Fog
Actual:
51 | 32 0.00
Average:
33 | 16 0.05
Fog
Actual:
59 | 27 0.00
Average:
33 | 16 0.05
Fog
Actual:
63 | 34 0.00
Average:
32 | 15 0.05
Clear
Actual:
46 | 16 0.00
Average:
32 | 15 0.04
Scattered Clouds
Actual:
40 | 15 0.00
Average:
31 | 14 0.05
Rain
Actual:
46 | 34 0.08
Average:
31 | 14 0.04
Mostly Cloudy
Actual:
35 | 27 0.00
Average:
30 | 14 0.05
Snow
Actual:
36 | 19 T
Average:
30 | 13 0.04
Snow
Actual:
33 | 19 0.14
Average:
30 | 13 0.05
Snow
Actual:
19 | 8 T
Average:
29 | 13 0.04
Snow
Actual:
33 | 11 T
Average:
29 | 12 0.05
Clear
Actual:
48 | 16 0.00
Average:
29 | 12 0.04
Clear
Actual:
46 | 20 0.00
Average:
28 | 12 0.04
Scattered Clouds
Actual:
50 | 18 0.00
Average:
28 | 11 0.04
Rain
Actual:
44 | 33 0.80
Average:
28 | 11 0.03
Snow
Actual:
33 | 19 T
Average:
27 | 11 0.04
Snow
Actual:
28 | 19 T
Average:
27 | 10 0.04
Snow
Actual:
32 | 25 0.04
Average:
27 | 10 0.04
Snow
Actual:
34 | 29 0.07
Average:
27 | 10 0.04
Snow
Actual:
30 | 8 0.11
Average:
26 | 10 0.03
Snow
Actual:
17 | 3 0.00
Average:
26 | 10 0.04
Clear
Actual:
29 | 4 0.00
Average:
26 | 9 0.04
Partly Cloudy
Actual:
20 | 9 0.00
Average:
26 | 9 0.04
Snow
Actual:
18 | 0 T
Average:
26 | 9 0.03
Clear
Actual:
8 | -4 0.00
Average:
25 | 9 0.04
Scattered Clouds
Actual:
18 | -3 0.00
Average:
25 | 9 0.03
Snow
Actual:
22 | -2 0.05
Average:
25 | 9 0.04
Snow
Actual:
24 | 17 0.01
Average:
25 | 8 0.03
Snow
Actual:
17 | 2 T
Average:
25 | 8 0.03
Partly Cloudy
Actual:
27 | 0 T
Average:
25 | 8 0.03
Scattered Clouds
Actual:
19 | -4 0.00
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

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 51 42 32 50 40 30 100 90 79 30.06 29.87 29.77 4 2 0 18 10 23 0.00 Fog
2 59 43 27 45 37 27 96 74 51 30.02 29.93 29.86 10 3 0 22 7 26 0.00 Fog
3 63 49 34 55 45 25 100 78 55 30.01 29.75 29.60 10 5 0 32 15 38 0.00 Fog
4 46 31 16 25 20 12 73 57 41 30.41 30.22 30.01 10 10 10 21 10 24 0.00  
5 40 28 15 29 17 10 80 60 40 30.42 30.23 29.98 10 10 10 26 15 35 0.00  
6 46 40 34 37 32 25 82 72 62 30.01 29.93 29.88 10 10 6 23 12 31 0.08 Rain
7 35 31 27 25 23 21 85 72 59 30.02 30.00 29.96 10 10 9 15 10 17 0.00  
8 36 28 19 28 24 18 92 76 59 30.07 30.01 29.94 10 7 2 20 9 24 T Snow
9 33 26 19 31 27 16 92 87 81 29.97 29.86 29.77 10 4 0 29 14 36 0.14 Fog , Rain , Snow
10 19 14 8 13 7 3 92 83 73 30.02 29.96 29.89 10 9 5 29 12 33 T Snow
11 33 22 11 25 19 9 88 78 67 30.04 29.93 29.83 10 8 1 15 8 18 T Snow
12 48 32 16 25 19 13 92 65 37 30.03 30.00 29.94 10 10 10 25 14 36 0.00  
13 46 33 20 22 18 15 92 65 37 30.13 30.04 29.96 10 9 5 20 10 25 0.00  
14 50 34 18 30 24 14 91 64 36 30.13 29.97 29.76 10 8 3 20 9 24 0.00  
15 44 39 33 41 38 30 96 91 58 29.72 29.56 29.47 10 3 0 18 12 25 0.80 Fog , Rain
16 33 26 19 30 22 17 92 87 81 29.85 29.74 29.61 8 4 2 20 13 23 T Snow
17 28 24 19 23 20 17 91 85 78 29.82 29.75 29.69 8 5 2 13 5 14 T Snow
18 32 29 25 28 26 21 92 85 78 29.88 29.67 29.55 6 3 1 16 9 18 0.04 Snow
19 34 32 29 29 28 27 92 87 82 30.03 29.94 29.85 8 5 1 18 8 24 0.07 Snow
20 30 19 8 28 16 3 92 84 76 30.09 29.84 29.73 3 1 0 41 29 48 0.11 Fog , Snow
21 17 10 3 9 3 -2 88 77 66 30.33 30.24 30.04 10 8 2 29 11 33 0.00 Snow
22 29 17 4 17 9 1 88 76 63 30.26 30.09 29.98 10 9 6 14 7 17 0.00  
23 20 15 9 14 10 5 88 81 73 30.12 30.06 29.99 8 6 2 17 9 22 0.00  
24 18 9 0 12 7 -6 86 80 73 30.32 30.09 29.96 10 7 2 23 14 26 T Snow
25 8 2 -4 0 -5 -9 79 74 69 30.52 30.45 30.34 10 10 10 20 11 21 0.00  
26 18 8 -3 10 1 -7 88 81 73 30.42 30.32 30.21 10 10 8 12 8 16 0.00  
27 22 10 -2 18 12 -3 91 81 71 30.28 30.16 30.08 10 5 1 15 7 17 0.05 Snow
28 24 21 17 18 17 12 91 86 80 30.10 30.02 29.94 9 4 2 16 8 20 0.01 Snow
29 17 10 2 12 6 -1 88 82 76 30.26 30.15 30.00 10 6 1 15 10 18 T Snow
30 27 14 0 20 6 -4 95 82 68 30.28 30.16 29.99 10 6 1 17 8 22 T  
31 19 8 -4 12 4 -9 84 74 63 30.31 30.19 30.05 10 9 5 25 13 31 0.00