Weather History for Lewistown, MT

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 33 °F 8 °F
Mean Temperature 47 °F 23 °F 0 °F
Min Temperature 36 °F 13 °F -11 °F
Degree Days  
Heating Degree Days (base 65) 65 42 18 1291
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 36 °F 14 °F -12 °F
Precipitation  
Precipitation 0.03 in 0.00 in 0.00 in 0.06 in
Snowdepth 5.0 in 1.1 in 0.0 in -
Wind  
Wind 41 mph 10 mph 0 mph
Gust Wind 52 mph 28 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.50 in 29.90 in 29.18 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 07, 2012 Rise Set
Actual Time 7:50 AM MST 4:28 PM MST
Civil Twilight 7:15 AM MST 5:03 PM MST
Nautical Twilight 6:36 AM MST 5:42 PM MST
Astronomical Twilight 5:59 AM MST 6:19 PM MST
Moon 12:51 AM MST (12/7) 12:46 PM MST (12/7)
Length of Visible Light 9h 48m
Length of Day
8h 38m
Last Quarter, 38% of the Moon is Illuminated
Dec 7
Last Quarter
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 0.06 Normal Month Total: 0.66
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
54 | 36 0.00
Average:
37 | 15 0.02
Rain
Actual:
59 | 34 T
Average:
36 | 15 0.02
Clear
Actual:
46 | 32 0.00
Average:
36 | 15 0.03
Rain
Actual:
49 | 24 T
Average:
36 | 14 0.02
Scattered Clouds
Actual:
57 | 19 0.00
Average:
35 | 14 0.02
Partly Cloudy
Actual:
36 | 22 0.00
Average:
35 | 14 0.02
Snow
Actual:
34 | 18 T
Average:
35 | 14 0.02
Snow
Actual:
32 | -5 T
Average:
35 | 13 0.02
Scattered Clouds
Actual:
24 | -10 0.00
Average:
34 | 13 0.02
Snow
Actual:
29 | 18 T
Average:
34 | 13 0.02
Partly Cloudy
Actual:
39 | 16 0.00
Average:
34 | 13 0.02
Snow
Actual:
35 | 25 T
Average:
34 | 13 0.02
Fog
Actual:
35 | 20 0.00
Average:
34 | 12 0.02
Partly Cloudy
Actual:
38 | 20 0.00
Average:
34 | 12 0.02
Scattered Clouds
Actual:
33 | 11 0.00
Average:
34 | 12 0.02
Scattered Clouds
Actual:
34 | 19 0.00
Average:
34 | 12 0.02
Snow
Actual:
39 | 16 T
Average:
33 | 12 0.02
Overcast
Actual:
28 | 16 0.00
Average:
33 | 12 0.03
Clear
Actual:
27 | 6 0.00
Average:
33 | 12 0.02
Clear
Actual:
41 | 17 0.00
Average:
33 | 12 0.02
Scattered Clouds
Actual:
44 | 18 0.00
Average:
33 | 12 0.02
Partly Cloudy
Actual:
21 | 10 0.00
Average:
33 | 12 0.02
Partly Cloudy
Actual:
31 | 5 0.00
Average:
33 | 12 0.02
Snow
Actual:
8 | -2 0.03
Average:
33 | 12 0.03
Snow
Actual:
10 | -11 T
Average:
33 | 12 0.02
Snow
Actual:
12 | -4 0.01
Average:
33 | 12 0.02
Partly Cloudy
Actual:
26 | 6 0.00
Average:
33 | 12 0.02
Partly Cloudy
Actual:
28 | 14 T
Average:
33 | 12 0.02
Scattered Clouds
Actual:
30 | 7 0.00
Average:
33 | 12 0.02
Snow
Actual:
27 | 4 0.02
Average:
33 | 12 0.03
Partly Cloudy
Actual:
27 | 1 T
Average:
33 | 12 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

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 54 45 36 33 30 25 79 56 32 29.72 29.69 29.64 10 10 10 31 14 37 0.00  
2 59 47 34 36 29 19 76 56 36 29.66 29.43 29.18 10 10 9 41 16 52 T Rain
3 46 39 32 19 18 17 56 44 31 30.10 29.91 29.64 10 10 10 37 20 44 0.00  
4 49 37 24 31 25 16 74 57 39 30.12 29.96 29.82 10 10 10 31 15 39 T Rain
5 57 38 19 34 24 11 67 45 23 30.04 29.79 29.63 10 10 10 38 18 46 0.00  
6 36 29 22 18 15 11 81 58 35 30.06 30.01 29.93 10 10 10 20 6 24 0.00  
7 34 26 18 25 21 14 92 70 47 29.94 29.83 29.61 10 7 1 23 9 32 T Snow
8 32 14 -5 25 10 -6 95 79 63 30.43 29.92 29.57 10 3 0 29 12 36 T Fog , Snow
9 24 7 -10 14 2 -12 95 76 56 30.48 30.27 29.93 10 10 10 25 10 31 0.00  
10 29 24 18 22 18 10 96 77 57 30.02 29.93 29.82 10 8 2 23 12 33 T Snow
11 39 28 16 26 21 9 69 62 54 29.91 29.63 29.51 10 10 10 29 15 36 0.00  
12 35 30 25 32 28 25 100 85 70 29.88 29.69 29.54 10 5 0 14 4 17 T Fog , Snow
13 35 28 20 25 19 15 100 74 47 29.92 29.84 29.75 10 9 0 22 13 26 0.00 Fog
14 38 29 20 25 20 15 81 67 52 29.76 29.70 29.60 10 10 10 22 8 25 0.00  
15 33 22 11 17 13 9 80 65 49 29.87 29.79 29.64 10 10 10 15 4 23 0.00  
16 34 27 19 18 13 8 68 58 47 29.74 29.66 29.60 10 10 10 24 14 30 0.00  
17 39 28 16 25 18 5 64 56 47 29.57 29.41 29.31 10 9 3 30 15 37 T Snow
18 28 22 16 13 10 8 67 57 46 29.91 29.72 29.54 10 10 10 26 16 32 0.00  
19 27 17 6 9 4 0 76 57 37 30.10 30.04 29.92 10 10 10 24 11 30 0.00  
20 41 29 17 18 14 9 62 48 34 30.07 29.98 29.89 10 10 10 28 14 33 0.00  
21 44 31 18 17 15 12 58 46 33 30.00 29.94 29.90 10 10 10 20 8 22 0.00  
22 21 16 10 14 10 6 100 87 73 30.11 30.01 29.79 10 6 1 16 4 21 0.00  
23 31 18 5 16 8 3 92 73 53 30.11 30.02 29.80 10 9 5 10 3 13 0.00  
24 8 3 -2 3 -3 -6 96 88 79 30.50 30.13 29.86 10 3 0 16 7 21 0.03 Fog , Snow
25 10 0 -11 2 -4 -10 87 78 69 30.49 30.30 30.07 10 9 2 14 3 16 T Snow
26 12 4 -4 5 1 -4 95 84 73 30.04 29.90 29.73 10 7 0 7 2 7 0.01 Fog , Snow
27 26 16 6 16 10 2 92 80 68 30.03 30.00 29.96 10 10 10 9 2 9 0.00  
28 28 21 14 18 13 7 84 71 57 30.12 30.06 29.98 10 10 9 14 8 17 T  
29 30 19 7 16 9 3 80 64 47 30.14 30.07 29.93 10 10 10 10 5 12 0.00  
30 27 16 4 20 16 4 100 84 68 30.17 30.07 29.96 10 7 1 12 5 14 0.02 Snow
31 27 14 1 19 9 -1 95 75 55 30.19 30.16 30.11 10 10 10 16 5 18 T