Weather History for Butte, MT

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 48 °F 33 °F 17 °F
Mean Temperature 38 °F 19 °F 1 °F
Min Temperature 29 °F 5 °F -17 °F
Degree Days  
Heating Degree Days (base 65) 64 46 27 1424
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 34 °F 11 °F -21 °F
Precipitation  
Precipitation 0.20 in 0.01 in 0.00 in 0.29 in
Snowdepth - - - -
Wind  
Wind 39 mph 4 mph 0 mph
Gust Wind 54 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.82 in 30.26 in 29.52 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 11, 2011 Rise Set
Actual Time 8:01 AM MST 4:44 PM MST
Civil Twilight 7:27 AM MST 5:19 PM MST
Nautical Twilight 6:49 AM MST 5:57 PM MST
Astronomical Twilight 6:13 AM MST 6:33 PM MST
Moon 5:59 PM MST (12/11) 8:52 AM MST (12/11)
Length of Visible Light 9h 52m
Length of Day
8h 43m
Full, 99% of the Moon is Illuminated
Dec 11
Full
Dec 17
Last Quarter
Dec 24
New
Dec 31
First Quarter
Jan 9
Full

Weather History Calendar

Precipitation Actual month total 0.29 Normal Month Total: 0.51
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
29 | 0 0.00
Average:
32 | 8 0.02
Snow
Actual:
30 | 10 T
Average:
31 | 8 0.02
Snow
Actual:
23 | -2 T
Average:
31 | 7 0.01
Snow
Actual:
21 | -12 0.05
Average:
31 | 7 0.02
Clear
Actual:
19 | -17 0.00
Average:
30 | 7 0.02
Partly Cloudy
Actual:
32 | 0 0.00
Average:
30 | 6 0.02
Partly Cloudy
Actual:
34 | 2 0.00
Average:
30 | 6 0.01
Fog
Actual:
35 | -2 0.00
Average:
30 | 6 0.02
Scattered Clouds
Actual:
33 | 2 0.00
Average:
29 | 6 0.02
Clear
Actual:
36 | -2 0.00
Average:
29 | 5 0.01
Clear
Actual:
27 | 3 0.00
Average:
29 | 5 0.02
Clear
Actual:
29 | 0 0.00
Average:
29 | 5 0.01
Partly Cloudy
Actual:
24 | -6 0.00
Average:
29 | 5 0.02
Snow
Actual:
31 | 14 T
Average:
29 | 5 0.01
Mostly Cloudy
Actual:
32 | 7 0.00
Average:
29 | 5 0.02
Partly Cloudy
Actual:
36 | 12 0.00
Average:
29 | 5 0.01
Clear
Actual:
45 | 10 0.00
Average:
29 | 5 0.02
Partly Cloudy
Actual:
43 | 7 0.00
Average:
29 | 4 0.02
Partly Cloudy
Actual:
34 | 12 0.00
Average:
29 | 4 0.01
Partly Cloudy
Actual:
35 | 15 0.00
Average:
29 | 5 0.02
Snow
Actual:
26 | -3 0.04
Average:
29 | 5 0.02
Clear
Actual:
17 | -11 0.00
Average:
29 | 5 0.01
Clear
Actual:
23 | -10 0.00
Average:
29 | 5 0.02
Partly Cloudy
Actual:
37 | 5 0.00
Average:
29 | 5 0.01
Scattered Clouds
Actual:
39 | 4 0.00
Average:
29 | 5 0.02
Partly Cloudy
Actual:
34 | 9 0.00
Average:
29 | 5 0.02
Partly Cloudy
Actual:
39 | 15 0.00
Average:
30 | 5 0.01
Rain
Actual:
44 | 29 T
Average:
30 | 5 0.02
Snow
Actual:
43 | 27 0.00
Average:
30 | 5 0.02
Snow
Actual:
48 | 28 0.20
Average:
30 | 6 0.01
Scattered Clouds
Actual:
30 | 13 T
Average:
30 | 6 0.02
 

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 29 15 0 11 5 -3 95 69 42 30.82 30.64 30.33 10 10 10 9 2 12 0.00  
2 30 20 10 19 13 7 88 69 50 30.39 30.10 29.90 10 7 0 21 7 25 T Fog , Snow
3 23 11 -2 18 9 -5 91 74 56 30.42 30.33 30.09 10 9 2 16 4 20 T Snow
4 21 5 -12 18 9 -17 91 72 53 30.71 30.33 30.10 10 6 1 18 6 26 0.05 Snow
5 19 1 -17 2 -8 -21 87 68 49 30.76 30.62 30.23 10 10 9 8 2 9 0.00  
6 32 16 0 16 5 -2 95 74 53 30.53 30.42 30.20 10 10 10 9 2 10 0.00  
7 34 18 2 21 11 0 92 77 61 30.48 30.35 30.10 10 10 10 9 2 12 0.00  
8 35 17 -2 14 2 -6 91 59 27 30.47 30.31 30.09 10 7 0 14 4 21 0.00 Fog
9 33 18 2 14 4 -2 88 67 45 30.61 30.50 30.38 10 10 10 8 3 10 0.00  
10 36 17 -2 17 5 -5 88 68 47 30.52 30.32 29.98 10 10 10 7 2 9 0.00  
11 27 15 3 14 7 0 88 72 55 30.16 30.08 29.87 10 10 10 7 2 8 0.00  
12 29 15 0 16 6 -4 95 77 58 30.26 30.18 29.96 10 10 10 10 2 13 0.00  
13 24 9 -6 13 1 -10 86 74 62 30.25 30.07 29.85 10 10 7 7 2 7 0.00  
14 31 23 14 21 18 7 88 76 63 30.23 30.00 29.87 10 10 9 7 3 - T Snow
15 32 20 7 19 14 5 92 75 58 30.42 30.27 30.03 10 10 10 9 2 12 0.00  
16 36 24 12 23 17 9 84 70 56 30.56 30.48 30.31 10 10 10 12 3 16 0.00  
17 45 28 10 25 15 8 96 71 45 30.55 30.44 30.18 10 10 9 8 2 9 0.00  
18 43 25 7 27 17 4 92 68 43 30.26 30.14 29.99 10 10 10 5 1 - 0.00  
19 34 23 12 27 22 9 92 74 56 30.34 30.25 30.13 10 10 10 7 3 - 0.00  
20 35 25 15 25 19 11 88 70 50 30.22 30.04 29.88 10 10 9 7 4 - 0.00  
21 26 12 -3 25 17 -6 96 78 60 30.58 30.05 29.81 10 6 0 21 7 29 0.04 Fog , Snow
22 17 3 -11 7 -5 -15 91 79 67 30.73 30.57 30.30 10 8 2 8 1 8 0.00  
23 23 7 -10 7 -4 -15 95 74 52 30.82 30.67 30.34 10 9 2 7 1 9 0.00  
24 37 21 5 20 13 4 88 70 52 30.75 30.67 30.45 10 10 9 8 2 10 0.00  
25 39 22 4 23 13 2 92 64 35 30.61 30.34 30.00 10 10 10 22 4 30 0.00  
26 34 22 9 15 11 5 83 62 41 30.34 30.24 30.08 10 10 10 18 5 28 0.00  
27 39 27 15 24 20 11 75 62 48 30.24 30.13 30.00 10 10 10 17 8 25 0.00  
28 44 37 29 32 28 21 89 71 53 30.01 29.92 29.75 10 10 10 23 6 32 T Rain
29 43 35 27 33 22 12 78 61 43 30.00 29.84 29.60 10 9 1 39 7 54 0.00 Rain , Snow
30 48 38 28 34 29 16 92 71 49 29.87 29.63 29.52 10 6 0 35 6 49 0.20 Fog , Rain , Snow
31 30 22 13 18 9 6 78 62 46 30.54 30.24 29.67 10 10 10 29 9 36 T