Weather History for Helena, MT

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Month of January, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 53 °F 37 °F 6 °F
Mean Temperature 44 °F 27 °F -1 °F
Min Temperature 35 °F 16 °F -9 °F
Degree Days  
Heating Degree Days (base 65) 66 38 21 1182
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 34 °F 14 °F -13 °F
Precipitation  
Precipitation 0.71 in 0.05 in 0.00 in 1.28 in
Snowdepth 14.0 in 3.0 in 0.0 in -
Wind  
Wind 35 mph 6 mph 0 mph
Gust Wind 49 mph 25 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.73 in 30.13 in 29.27 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jan. 13, 2012 Rise Set
Actual Time 8:09 AM MST 5:04 PM MST
Civil Twilight 7:35 AM MST 5:38 PM MST
Nautical Twilight 6:57 AM MST 6:15 PM MST
Astronomical Twilight 6:21 AM MST 6:52 PM MST
Moon 10:44 PM MST (1/13) 10:04 AM MST (1/13)
Length of Visible Light 10h 03m
Length of Day
8h 54m
Waning Gibbous, 78% of the Moon is Illuminated
Jan 13
Waning Gibbous
Jan 16
Last Quarter
Jan 23
New
Jan 30
First Quarter
Feb 7
Full

Weather History Calendar

Precipitation Actual month total 1.28 Normal Month Total: 0.36
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Partly Cloudy
Actual:
35 | 20 0.00
Average:
31 | 11 0.01
Clear
Actual:
41 | 21 0.00
Average:
31 | 11 0.01
Clear
Actual:
50 | 23 0.00
Average:
31 | 11 0.02
Clear
Actual:
52 | 27 0.00
Average:
32 | 11 0.01
Scattered Clouds
Actual:
53 | 31 0.00
Average:
32 | 11 0.01
Partly Cloudy
Actual:
38 | 27 0.00
Average:
32 | 12 0.01
Scattered Clouds
Actual:
36 | 25 0.00
Average:
32 | 12 0.02
Scattered Clouds
Actual:
43 | 30 0.00
Average:
32 | 12 0.01
Scattered Clouds
Actual:
47 | 23 0.00
Average:
32 | 12 0.01
Snow
Actual:
42 | 17 0.04
Average:
32 | 12 0.01
Scattered Clouds
Actual:
22 | 4 0.00
Average:
33 | 12 0.02
Scattered Clouds
Actual:
29 | 5 0.00
Average:
33 | 12 0.01
Scattered Clouds
Actual:
47 | 18 0.00
Average:
33 | 13 0.01
Clear
Actual:
44 | 17 0.00
Average:
33 | 13 0.01
Snow
Actual:
39 | 8 T
Average:
33 | 13 0.02
Snow
Actual:
17 | 3 T
Average:
33 | 13 0.01
Partly Cloudy
Actual:
30 | 1 0.00
Average:
34 | 13 0.01
Snow
Actual:
29 | -9 0.71
Average:
34 | 13 0.01
Snow
Actual:
6 | -8 0.40
Average:
34 | 14 0.01
Snow
Actual:
14 | -3 0.03
Average:
34 | 14 0.01
Rain
Actual:
40 | 7 0.05
Average:
34 | 14 0.01
Scattered Clouds
Actual:
34 | 12 T
Average:
34 | 14 0.01
Scattered Clouds
Actual:
34 | 7 0.00
Average:
34 | 14 0.01
Clear
Actual:
27 | 5 0.00
Average:
35 | 14 0.01
Rain
Actual:
47 | 18 0.05
Average:
35 | 14 0.01
Scattered Clouds
Actual:
45 | 25 T
Average:
35 | 14 0.02
Scattered Clouds
Actual:
32 | 23 0.00
Average:
35 | 15 0.01
Partly Cloudy
Actual:
37 | 24 0.00
Average:
35 | 15 0.01
Partly Cloudy
Actual:
52 | 35 0.00
Average:
35 | 15 0.01
Partly Cloudy
Actual:
46 | 35 0.00
Average:
35 | 15 0.01
Scattered Clouds
Actual:
41 | 27 0.00
Average:
36 | 15 0.01
 

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
Jan high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 35 28 20 20 15 8 81 62 43 30.73 30.67 30.51 10 10 10 12 2 14 0.00  
2 41 31 21 23 21 18 88 67 45 30.65 30.39 30.17 10 10 10 9 2 10 0.00  
3 50 37 23 23 21 19 75 53 31 30.43 30.33 30.16 10 10 10 35 8 49 0.00  
4 52 40 27 23 22 21 69 51 32 30.44 30.33 30.17 10 10 10 10 3 13 0.00  
5 53 42 31 27 21 15 69 52 35 30.16 30.08 29.97 10 10 10 28 11 35 0.00  
6 38 33 27 16 12 10 47 40 32 30.29 30.19 30.03 10 10 10 35 10 46 0.00  
7 36 31 25 15 14 12 57 49 40 30.38 30.30 30.06 10 10 10 23 9 30 0.00  
8 43 37 30 28 23 15 64 56 47 30.36 30.32 30.17 10 10 10 24 12 33 0.00  
9 47 35 23 27 25 21 88 67 45 30.40 30.30 30.14 10 10 10 10 3 13 0.00  
10 42 30 17 34 21 6 88 69 49 30.60 30.15 29.86 10 7 1 32 11 44 0.04 Rain , Snow
11 22 13 4 8 5 0 86 69 51 30.70 30.63 30.40 10 10 10 16 3 20 0.00  
12 29 17 5 13 8 2 91 67 42 30.58 30.49 30.32 10 10 9 9 2 12 0.00  
13 47 33 18 14 10 1 71 47 23 30.29 30.23 30.08 10 10 10 16 5 21 0.00  
14 44 31 17 19 15 12 80 57 34 30.15 29.92 29.69 10 10 10 9 2 14 0.00  
15 39 24 8 27 10 1 73 54 34 30.11 29.92 29.67 10 9 2 23 11 32 T Snow
16 17 10 3 5 0 -4 88 71 54 30.24 30.14 29.90 10 10 5 10 4 13 T Snow
17 30 16 1 11 4 -3 95 65 34 30.23 29.99 29.66 10 10 8 24 9 35 0.00  
18 29 10 -9 7 -5 -13 91 69 46 30.06 29.80 29.62 10 1 0 18 5 28 0.71 Fog , Snow
19 6 -1 -8 2 -5 -13 87 78 68 30.09 29.79 29.54 10 4 0 8 1 9 0.40 Fog , Snow
20 14 6 -3 7 -1 -7 95 81 67 30.15 29.91 29.64 10 7 1 7 1 9 0.03 Snow
21 40 24 7 34 20 6 92 70 48 29.71 29.49 29.27 10 8 2 30 6 38 0.05 Rain
22 34 23 12 21 14 9 73 58 43 30.01 29.91 29.71 10 10 10 24 9 31 T  
23 34 21 7 22 13 6 83 63 43 30.18 29.99 29.75 10 10 10 17 3 22 0.00  
24 27 16 5 13 9 3 91 73 55 30.38 30.22 30.08 10 10 10 13 3 16 0.00  
25 47 33 18 34 24 12 85 65 45 30.19 30.05 29.80 10 10 4 33 13 45 0.05 Rain
26 45 35 25 29 20 11 75 57 39 30.19 30.00 29.77 10 10 10 33 10 45 T  
27 32 28 23 13 8 4 50 41 32 30.50 30.40 30.22 10 10 10 24 13 33 0.00  
28 37 31 24 22 10 2 61 45 28 30.43 30.37 30.25 10 10 10 20 6 26 0.00  
29 52 44 35 29 26 22 70 53 35 30.22 29.98 29.78 10 10 10 29 8 39 0.00  
30 46 41 35 30 24 20 70 57 44 29.98 29.80 29.67 10 10 10 28 9 36 0.00  
31 41 34 27 24 21 18 75 61 46 30.19 30.07 29.94 10 10 10 18 5 26 0.00