Weather History for Helena, MT

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Month of February, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 48 °F 41 °F 30 °F
Mean Temperature 40 °F 32 °F 20 °F
Min Temperature 35 °F 23 °F 5 °F
Degree Days  
Heating Degree Days (base 65) 45 32 25 910
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 30 °F 19 °F 3 °F
Precipitation  
Precipitation 0.14 in 0.01 in 0.00 in 0.32 in
Snowdepth 4.0 in 0.5 in 0.0 in -
Wind  
Wind 36 mph 8 mph 0 mph
Gust Wind 47 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.52 in 30.11 in 29.58 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Feb. 21, 2013 Rise Set
Actual Time 7:21 AM MST 6:02 PM MST
Civil Twilight 6:50 AM MST 6:33 PM MST
Nautical Twilight 6:15 AM MST 7:08 PM MST
Astronomical Twilight 5:40 AM MST 7:43 PM MST
Moon 2:11 PM MST (2/21) 4:38 AM MST (2/21)
Length of Visible Light 11h 42m
Length of Day
10h 41m
Waxing Gibbous, 84% of the Moon is Illuminated
Feb 21
Waxing Gibbous
Feb 25
Full
Mar 4
Last Quarter
Mar 11
New
Mar 19
First Quarter

Weather History Calendar

Precipitation Actual month total 0.32 Normal Month Total: 0.30
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
44 | 34 T
Average:
36 | 15 0.01
Scattered Clouds
Actual:
46 | 27 0.00
Average:
36 | 15 0.01
Scattered Clouds
Actual:
45 | 22 0.00
Average:
36 | 15 0.01
Mostly Cloudy
Actual:
45 | 35 0.00
Average:
36 | 15 0.01
Partly Cloudy
Actual:
45 | 31 0.00
Average:
36 | 16 0.01
Snow
Actual:
45 | 29 T
Average:
37 | 16 0.01
Partly Cloudy
Actual:
41 | 23 0.00
Average:
37 | 16 0.01
Clear
Actual:
42 | 20 0.00
Average:
37 | 16 0.01
Snow
Actual:
38 | 19 0.12
Average:
37 | 16 0.01
Snow
Actual:
30 | 11 0.01
Average:
37 | 16 0.01
Scattered Clouds
Actual:
34 | 5 0.00
Average:
38 | 16 0.01
Mostly Cloudy
Actual:
40 | 20 0.00
Average:
38 | 16 0.01
Partly Cloudy
Actual:
45 | 32 0.00
Average:
38 | 16 0.01
Snow
Actual:
35 | 20 0.14
Average:
38 | 17 0.01
Clear
Actual:
45 | 27 0.00
Average:
39 | 17 0.01
Snow
Actual:
48 | 24 T
Average:
39 | 17 0.01
Snow
Actual:
40 | 28 0.01
Average:
39 | 17 0.01
Snow
Actual:
37 | 18 0.01
Average:
39 | 17 0.01
Partly Cloudy
Actual:
39 | 25 0.00
Average:
40 | 17 0.01
Snow
Actual:
36 | 21 0.02
Average:
40 | 18 0.01
Partly Cloudy
Actual:
36 | 18 0.00
Average:
40 | 18 0.02
Partly Cloudy
Actual:
43 | 26 0.00
Average:
41 | 18 0.01
Snow
Actual:
40 | 28 0.01
Average:
41 | 18 0.01
Partly Cloudy
Actual:
40 | 21 0.00
Average:
41 | 19 0.01
Snow
Actual:
40 | 21 T
Average:
41 | 19 0.01
Partly Cloudy
Actual:
41 | 26 0.00
Average:
42 | 19 0.02
Partly Cloudy
Actual:
46 | 19 0.00
Average:
42 | 19 0.01
Partly Cloudy
Actual:
46 | 24 0.00
Average:
43 | 20 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

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Feb high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 44 39 34 30 24 20 89 66 43 30.38 30.22 30.10 10 10 10 36 14 46 T  
2 46 37 27 22 21 21 75 56 37 30.48 30.39 30.28 10 10 10 21 10 26 0.00  
3 45 34 22 25 21 19 88 63 37 30.31 30.16 29.99 10 10 10 18 5 24 0.00  
4 45 40 35 26 23 20 59 52 44 30.06 30.01 29.98 10 10 10 31 10 38 0.00  
5 45 38 31 29 26 24 78 68 57 30.04 29.93 29.83 10 10 10 13 4 14 0.00  
6 45 37 29 28 21 17 64 52 40 30.17 30.03 29.90 10 9 2 22 8 31 T Snow
7 41 32 23 21 20 18 81 63 44 30.16 30.04 29.88 10 10 10 10 3 12 0.00  
8 42 31 20 22 19 16 88 65 41 30.11 30.04 29.89 10 10 10 12 4 16 0.00  
9 38 29 19 27 22 14 92 66 40 30.14 29.97 29.83 10 6 0 20 7 26 0.12 Fog , Snow
10 30 21 11 22 16 8 84 69 53 30.32 30.25 30.13 10 9 1 16 7 20 0.01 Snow
11 34 20 5 18 12 3 92 73 54 30.30 30.24 30.20 10 10 10 16 4 22 0.00  
12 40 30 20 24 22 14 77 63 48 30.25 30.17 30.11 10 10 10 25 13 33 0.00  
13 45 39 32 24 22 19 61 51 41 30.23 30.09 29.99 10 10 10 35 17 47 0.00  
14 35 28 20 21 20 18 92 74 56 30.48 30.37 30.23 10 5 0 23 7 29 0.14 Fog , Snow
15 45 36 27 27 23 17 69 59 48 30.52 30.43 30.33 10 10 10 21 9 26 0.00  
16 48 36 24 28 25 21 88 65 42 30.32 30.11 29.85 10 10 10 28 3 35 T Snow
17 40 34 28 30 24 19 92 70 48 30.15 29.93 29.73 10 8 1 28 12 35 0.01 Snow
18 37 28 18 25 20 16 88 70 51 30.23 30.09 29.99 10 8 2 16 3 18 0.01 Snow
19 39 32 25 20 18 16 75 58 40 29.97 29.84 29.71 10 10 10 12 3 15 0.00  
20 36 29 21 26 20 13 92 73 53 30.01 29.91 29.80 10 8 1 14 4 18 0.02 Snow
21 36 27 18 16 12 9 73 53 32 30.10 30.03 29.86 10 10 10 23 9 29 0.00  
22 43 35 26 19 16 13 63 46 29 30.04 29.88 29.66 10 10 10 23 9 30 0.00  
23 40 34 28 28 17 8 78 55 32 30.19 29.84 29.58 10 9 1 29 13 41 0.01 Snow
24 40 31 21 14 13 11 60 45 30 30.30 30.22 30.17 10 10 10 26 11 33 0.00  
25 40 31 21 28 16 14 77 59 40 30.17 30.03 29.82 10 10 2 25 5 31 T Snow
26 41 34 26 17 14 12 58 48 37 30.34 30.22 30.06 10 10 10 23 11 29 0.00  
27 46 33 19 16 14 12 74 51 28 30.41 30.33 30.19 10 10 10 17 4 21 0.00  
28 46 35 24 29 21 15 70 54 37 30.40 30.35 30.23 10 10 10 22 6 29 0.00