Weather History for Great Falls, MT

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Month of December, 2010

  Max Avg Min Sum
Temperature  
Max Temperature 51 °F 32 °F 1 °F
Mean Temperature 44 °F 23 °F -4 °F
Min Temperature 36 °F 14 °F -14 °F
Degree Days  
Heating Degree Days (base 65) 69 42 21 1290
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 36 °F 16 °F -16 °F
Precipitation  
Precipitation 0.74 in 0.06 in 0.00 in 1.56 in
Snowdepth 12.0 in 4.3 in 1.0 in -
Wind  
Wind 36 mph 11 mph 0 mph
Gust Wind 44 mph 29 mph 20 mph
Sea Level Pressure  
Sea Level Pressure 30.57 in 30.00 in 29.14 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 12, 2010 Rise Set
Actual Time 8:04 AM MST 4:34 PM MST
Civil Twilight 7:28 AM MST 5:10 PM MST
Nautical Twilight 6:49 AM MST 5:49 PM MST
Astronomical Twilight 6:11 AM MST 6:26 PM MST
Moon 11:57 AM MST (12/12) No Moon Set
Length of Visible Light 9h 41m
Length of Day
8h 30m
Waxing Crescent, 43% of the Moon is Illuminated
Dec 12
Waxing Crescent
Dec 13
First Quarter
Dec 21
Full
Dec 27
Last Quarter
Jan 4
New

Weather History Calendar

Precipitation Actual month total 1.56 Normal Month Total: 0.67
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Scattered Clouds
Actual:
40 | 22 0.00
Average:
37 | 18 0.02
Snow
Actual:
40 | 29 0.04
Average:
37 | 17 0.02
Snow
Actual:
31 | 8 0.25
Average:
36 | 17 0.02
Fog
Actual:
15 | -5 0.00
Average:
36 | 17 0.02
Fog
Actual:
19 | -9 0.00
Average:
36 | 17 0.02
Clear
Actual:
32 | 11 0.00
Average:
36 | 16 0.02
Clear
Actual:
40 | 20 0.00
Average:
36 | 16 0.02
Clear
Actual:
44 | 36 0.00
Average:
35 | 16 0.02
Clear
Actual:
44 | 32 0.00
Average:
35 | 16 0.02
Snow
Actual:
40 | 12 T
Average:
35 | 16 0.02
Partly Cloudy
Actual:
38 | 11 0.00
Average:
35 | 15 0.02
Snow
Actual:
50 | 31 0.02
Average:
35 | 15 0.02
Scattered Clouds
Actual:
51 | 36 0.00
Average:
35 | 15 0.02
Scattered Clouds
Actual:
51 | 32 0.01
Average:
34 | 15 0.02
Clear
Actual:
38 | 26 0.00
Average:
34 | 14 0.02
Snow
Actual:
38 | 10 T
Average:
34 | 14 0.02
Snow
Actual:
16 | 11 0.01
Average:
34 | 14 0.02
Snow
Actual:
15 | 3 0.04
Average:
34 | 14 0.02
Snow
Actual:
9 | 6 0.06
Average:
34 | 14 0.02
Snow
Actual:
11 | -3 0.25
Average:
33 | 13 0.02
Clear
Actual:
30 | -4 0.00
Average:
33 | 13 0.02
Clear
Actual:
16 | 2 0.00
Average:
33 | 13 0.02
Scattered Clouds
Actual:
32 | 2 0.00
Average:
33 | 13 0.02
Clear
Actual:
39 | 23 0.00
Average:
33 | 13 0.02
Clear
Actual:
46 | 32 0.00
Average:
33 | 13 0.02
Scattered Clouds
Actual:
49 | 30 T
Average:
33 | 12 0.02
Clear
Actual:
35 | 29 0.00
Average:
33 | 12 0.03
Scattered Clouds
Actual:
41 | 30 0.00
Average:
32 | 12 0.03
Snow
Actual:
38 | 1 0.74
Average:
32 | 12 0.03
Snow
Actual:
1 | -9 0.14
Average:
32 | 12 0.03
Partly Cloudy
Actual:
8 | -14 T
Average:
32 | 12 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

2010 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 40 31 22 28 26 21 81 73 64 30.10 30.02 29.91 10 10 10 36 16 41 0.00  
2 40 35 29 34 30 24 100 82 64 30.06 29.92 29.79 10 7 0 17 8 21 0.04 Fog , Rain , Snow
3 31 20 8 30 25 7 100 92 84 30.51 30.10 29.83 10 4 0 13 6 15 0.25 Fog , Snow
4 15 5 -5 13 3 -9 100 89 77 30.57 30.36 30.26 5 1 0 8 3 - 0.00 Fog
5 19 5 -9 12 -5 -11 92 83 74 30.56 30.32 30.22 10 4 0 13 4 14 0.00 Fog
6 32 22 11 23 18 13 92 79 66 30.42 30.30 30.21 10 10 5 13 5 14 0.00  
7 40 30 20 30 27 18 92 78 64 30.39 30.29 30.12 10 10 10 24 15 29 0.00  
8 44 40 36 31 28 27 70 62 53 30.08 29.88 29.71 10 10 10 31 21 38 0.00  
9 44 38 32 28 27 25 75 62 49 29.95 29.86 29.72 10 10 10 28 17 33 0.00  
10 40 26 12 30 13 6 92 73 54 30.32 29.95 29.56 10 7 2 29 11 36 T Snow
11 38 25 11 22 17 8 92 70 48 30.40 30.33 30.13 10 10 8 14 7 17 0.00  
12 50 41 31 35 30 25 85 71 56 30.22 30.01 29.86 10 8 2 25 13 35 0.02 Snow
13 51 44 36 35 33 30 76 63 50 29.90 29.85 29.79 10 10 10 25 13 32 0.00  
14 51 42 32 36 28 17 85 68 51 29.71 29.51 29.30 10 10 10 31 15 41 0.01  
15 38 32 26 21 17 12 68 52 35 30.01 29.78 29.57 10 10 10 29 16 37 0.00  
16 38 24 10 20 13 9 100 70 40 30.36 30.18 30.02 10 7 0 15 9 18 T Snow
17 16 14 11 13 12 10 100 94 88 30.37 30.20 30.05 9 3 0 8 2 9 0.01 Fog , Snow
18 15 9 3 13 9 2 96 90 84 30.23 29.94 29.75 10 5 1 13 6 14 0.04 Snow
19 9 8 6 7 5 3 100 92 83 29.98 29.71 29.46 9 3 0 13 4 15 0.06 Fog , Snow
20 11 4 -3 4 2 -5 95 84 73 30.06 29.73 29.47 10 4 0 10 4 12 0.25 Fog , Snow
21 30 13 -4 18 8 -7 91 80 68 30.22 30.16 30.08 10 10 7 16 6 17 0.00  
22 16 9 2 9 3 -1 91 84 76 30.22 30.16 30.11 10 10 8 10 3 12 0.00  
23 32 17 2 24 14 -1 95 84 72 30.32 30.21 29.96 10 10 10 14 7 26 0.00  
24 39 31 23 25 21 18 75 65 54 30.35 30.27 30.15 10 10 10 23 12 26 0.00  
25 46 39 32 25 22 20 61 49 37 30.14 29.99 29.75 10 10 10 29 18 35 0.00  
26 49 40 30 27 24 20 70 52 34 29.89 29.73 29.65 10 10 10 29 14 37 T  
27 35 32 29 26 19 16 85 68 51 30.02 29.95 29.90 10 10 10 36 22 44 0.00  
28 41 36 30 28 24 16 70 62 53 29.93 29.59 29.31 10 10 10 36 20 44 0.00  
29 38 20 1 32 13 -2 100 82 64 29.94 29.40 29.14 10 1 0 23 14 29 0.74 Fog , Snow
30 1 -4 -9 -2 -5 -11 91 85 79 30.32 29.98 29.70 10 3 1 15 6 17 0.14 Snow
31 8 -3 -14 -1 -9 -16 92 79 66 30.33 30.18 29.93 10 9 3 20 9 23 T