Weather History for Helena, MT

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Friday, March 1, 2013

  Actual Average Record
Temperature  
Mean Temperature 44 °F 31 °F  
Max Temperature 55 °F 43 °F 63 °F (1905)
Min Temperature 33 °F 20 °F -15 °F (1919)
Degree Days  
Heating Degree Days 21 34  
Month to date heating degree days 21 34  
Since 1 July heating degree days 5140 5595  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 29 °F    
Average Humidity 60    
Maximum Humidity 82    
Minimum Humidity 38    
Precipitation  
Precipitation 0.00 in 0.01 in 0.60 in (1891)
Month to date precipitation 0.00 0.01  
Year to date precipitation 0.67 0.67  
Snow  
Snow 0.00 in 0.20 in 10.00 in (1891)
Month to date snowfall 0.0 0.2  
Since 1 July snowfall 35.7 27.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.33 in    
Wind  
Wind Speed 9 mph (WSW)    
Max Wind Speed 23 mph    
Max Gust Speed 31 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Mar. 01, 2013 Rise Set
Actual Time 7:06 AM MST 6:14 PM MST
Civil Twilight 6:36 AM MST 6:44 PM MST
Nautical Twilight 6:01 AM MST 7:19 PM MST
Astronomical Twilight 5:26 AM MST 7:54 PM MST
Moon 11:12 PM MST (3/1) 8:38 AM MST (3/1)
Length of Visible Light 12h 08m
Length of Day
11h 07m
Waning Gibbous, 83% of the Moon is Illuminated
Mar 1
Waning Gibbous
Mar 4
Last Quarter
Mar 11
New
Mar 19
First Quarter
Mar 27
Full

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 33.8 °F - 28.4 °F 81% 30.27 in 10.0 mi Calm Calm - N/A   Overcast
1:53 AM 39.2 °F 35.9 °F 28.4 °F 65% 30.26 in 10.0 mi Variable 4.6 mph - N/A   Overcast
2:53 AM 42.1 °F 37.1 °F 30.0 °F 62% 30.36 in 10.0 mi WSW 8.1 mph - N/A   Overcast
3:53 AM 42.1 °F 37.7 °F 28.9 °F 60% 30.35 in 10.0 mi West 6.9 mph - N/A   Scattered Clouds
4:53 AM 42.8 °F 39.3 °F 28.4 °F 57% 30.27 in 10.0 mi West 5.8 mph - N/A   Overcast
5:53 AM 41.0 °F - 30.9 °F 67% 30.37 in 10.0 mi Calm Calm - N/A   Overcast
6:53 AM 42.1 °F 38.4 °F 30.0 °F 62% 30.35 in 10.0 mi ESE 5.8 mph - N/A   Overcast
7:53 AM 41.0 °F 35.8 °F 30.0 °F 65% 30.36 in 10.0 mi ESE 8.1 mph - N/A   Overcast
8:53 AM 45.0 °F 38.5 °F 30.0 °F 56% 30.34 in 10.0 mi SW 13.8 mph 17.3 mph N/A   Mostly Cloudy
9:53 AM 48.0 °F - 30.9 °F 52% 30.34 in 10.0 mi East 5.8 mph - N/A   Overcast
10:53 AM 48.9 °F - 28.9 °F 46% 30.34 in 10.0 mi SW 13.8 mph 26.5 mph N/A   Clear
11:53 AM 50.0 °F - 28.9 °F 44% 30.35 in 10.0 mi West 12.7 mph - N/A   Clear
12:53 PM 50.0 °F - 30.0 °F 46% 30.35 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds
1:53 PM 52.0 °F - 30.0 °F 43% 30.33 in 10.0 mi WNW 3.5 mph - N/A   Overcast
2:53 PM 53.6 °F - 28.4 °F 38% 30.25 in 10.0 mi WSW 10.4 mph - N/A   Mostly Cloudy
3:53 PM 53.1 °F - 30.0 °F 41% 30.30 in 10.0 mi West 10.4 mph 18.4 mph N/A   Overcast
4:53 PM 53.1 °F - 28.9 °F 40% 30.31 in 10.0 mi SW 8.1 mph 24.2 mph N/A   Mostly Cloudy
5:53 PM 51.1 °F - 28.9 °F 43% 30.32 in 10.0 mi WSW 15.0 mph 28.8 mph N/A   Mostly Cloudy
6:53 PM 50.0 °F - 28.9 °F 44% 30.31 in 10.0 mi West 15.0 mph 23.0 mph N/A   Clear
7:53 PM 50.0 °F - 28.9 °F 44% 30.34 in 10.0 mi SW 16.1 mph 25.3 mph N/A   Clear
8:53 PM 48.9 °F - 28.9 °F 46% 30.34 in 10.0 mi WSW 5.8 mph - N/A   Clear
9:53 PM 48.9 °F - 28.9 °F 46% 30.33 in 10.0 mi WSW 11.5 mph 17.3 mph N/A   Mostly Cloudy
10:53 PM 46.0 °F 41.4 °F 28.9 °F 51% 30.34 in 10.0 mi West 9.2 mph - N/A   Clear
11:53 PM 43.0 °F 39.5 °F 28.9 °F 58% 30.34 in 10.0 mi West 5.8 mph - N/A   Clear