Weather History for Helena, MT

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Sunday, February 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 34 °F 28 °F  
Max Temperature 40 °F 39 °F 59 °F (1930)
Min Temperature 28 °F 17 °F -28 °F (1936)
Degree Days  
Heating Degree Days 31 37  
Month to date heating degree days 544 654  
Since 1 July heating degree days 4753 5172  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 24 °F    
Average Humidity 70    
Maximum Humidity 92    
Minimum Humidity 48    
Precipitation  
Precipitation 0.01 in 0.01 in 0.30 in (1959)
Month to date precipitation 0.28 0.17  
Year to date precipitation 0.63 0.53  
Snow  
Snow T in 0.20 in 7.70 in (1929)
Month to date snowfall 5.8 3.1  
Since 1 July snowfall 35.2 25.4  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 29.93 in    
Wind  
Wind Speed 12 mph (WNW)    
Max Wind Speed 28 mph    
Max Gust Speed 35 mph    
Visibility 8 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 17, 2013 Rise Set
Actual Time 7:27 AM MST 5:56 PM MST
Civil Twilight 6:56 AM MST 6:27 PM MST
Nautical Twilight 6:21 AM MST 7:02 PM MST
Astronomical Twilight 5:46 AM MST 7:37 PM MST
Moon 10:54 AM MST (2/17) 1:23 AM MST (2/17)
Length of Visible Light 11h 30m
Length of Day
10h 28m
Waxing Crescent, 49% of the Moon is Illuminated
Feb 17
Waxing Crescent
Feb 17
First Quarter
Feb 25
Full
Mar 4
Last Quarter
Mar 11
New

Hourly Weather History & Observations

Time (MST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 37.0 °F 29.3 °F 25.0 °F 62% 29.83 in 10.0 mi West 11.5 mph - N/A   Overcast
1:53 AM 36.0 °F 27.5 °F 27.0 °F 70% 29.84 in 10.0 mi WSW 12.7 mph - N/A   Overcast
2:53 AM 33.1 °F 24.9 °F 30.0 °F 89% 29.86 in 3.0 mi NW 10.4 mph - 0.00 in Snow Light Snow
2:55 AM 33.8 °F 24.8 °F 30.2 °F 87% 29.77 in 1.8 mi NW 12.7 mph - 0.00 in Snow Light Snow
3:03 AM 32.0 °F 24.8 °F 30.2 °F 93% 29.76 in 1.2 mi WNW 8.1 mph - 0.01 in Snow Light Snow
3:07 AM 32.0 °F 23.6 °F 30.2 °F 93% 29.76 in 2.0 mi WNW 10.4 mph - 0.01 in Snow Light Snow
3:14 AM 32.0 °F 23.6 °F 30.2 °F 93% 29.76 in 9.0 mi WNW 10.4 mph - 0.01 in Snow Light Snow
3:53 AM 34.0 °F 24.6 °F 25.0 °F 70% 29.84 in 10.0 mi West 13.8 mph - 0.01 in   Overcast
4:53 AM 33.1 °F 21.2 °F 21.9 °F 64% 29.83 in 10.0 mi WSW 20.7 mph - N/A   Scattered Clouds
5:53 AM 33.8 °F 22.5 °F 19.4 °F 56% 29.73 in 10.0 mi West 19.6 mph 29.9 mph N/A   Clear
6:41 AM 32.0 °F 22.1 °F 19.4 °F 60% 29.78 in 10.0 mi North 13.8 mph 29.9 mph N/A   Scattered Clouds
6:53 AM 32.0 °F 24.8 °F 19.0 °F 59% 29.86 in 10.0 mi WSW 8.1 mph - N/A   Scattered Clouds
7:53 AM 33.1 °F 24.4 °F 19.9 °F 59% 29.88 in 10.0 mi West 11.5 mph - N/A   Overcast
8:53 AM 33.1 °F 22.2 °F 19.9 °F 59% 29.92 in 10.0 mi West 17.3 mph 25.3 mph N/A   Overcast
9:53 AM 33.1 °F 20.9 °F 21.0 °F 61% 29.94 in 10.0 mi West 21.9 mph 32.2 mph N/A   Overcast
10:53 AM 34.0 °F 22.7 °F 21.0 °F 59% 29.95 in 10.0 mi West 19.6 mph 27.6 mph N/A   Overcast
11:53 AM 35.1 °F 25.2 °F 21.0 °F 57% 29.95 in 10.0 mi West 16.1 mph - N/A   Overcast
12:53 PM 37.4 °F 27.5 °F 19.4 °F 48% 29.83 in 10.0 mi West 18.4 mph 24.2 mph N/A   Overcast
1:53 PM 37.0 °F 27.0 °F 21.0 °F 52% 29.94 in 10.0 mi West 18.4 mph 26.5 mph N/A   Overcast
2:53 PM 37.0 °F 26.4 °F 21.0 °F 52% 29.96 in 10.0 mi West 20.7 mph 27.6 mph N/A   Mostly Cloudy
3:53 PM 39.0 °F 31.0 °F 21.0 °F 49% 29.96 in 10.0 mi West 13.8 mph - N/A   Scattered Clouds
4:53 PM 37.0 °F 27.7 °F 19.0 °F 48% 30.00 in 10.0 mi West 16.1 mph - N/A   Overcast
5:53 PM 30.0 °F 20.5 °F 25.0 °F 82% 30.05 in 4.0 mi North 11.5 mph - 0.00 in Snow Light Snow
6:53 PM 30.0 °F - 26.1 °F 85% 30.09 in 10.0 mi Calm Calm - 0.00 in   Overcast
7:53 PM 28.9 °F - 25.0 °F 85% 30.10 in 10.0 mi Calm Calm - N/A   Overcast
8:53 PM 30.0 °F - 25.0 °F 82% 30.10 in 9.0 mi Calm Calm - 0.00 in Snow Light Snow
10:53 PM 28.9 °F 25.2 °F 26.1 °F 89% 30.12 in 10.0 mi East 3.5 mph - N/A   Overcast
11:23 PM 28.4 °F 19.7 °F 24.8 °F 86% 30.00 in 3.0 mi NNW 9.2 mph - 0.00 in Snow Light Snow
11:27 PM 28.4 °F 18.0 °F 24.8 °F 86% 30.00 in 1.8 mi NNW 12.7 mph - 0.00 in Snow Light Snow
11:38 PM 28.4 °F 18.0 °F 24.8 °F 86% 30.00 in 3.0 mi NNW 12.7 mph - 0.00 in Snow Light Snow
11:53 PM 28.0 °F 18.6 °F 25.0 °F 88% 30.15 in 4.0 mi NNW 10.4 mph - 0.00 in Snow Light Snow