Weather Almanac for Helena, MT

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Wednesday, December 17, 2014

  Average Record
Mean Temperature 21 °F  
Max Temperature 31 °F 58 °F (1998)
Min Temperature 11 °F -38 °F (1964)
Degree Days  
Heating Degree Days 44  
Month to date heating degree days   718  
Since 1 July heating degree days   2600  
Cooling Degree Days 0  
Month to date cooling degree days   0  
Year to date cooling degree days   406  
Dew Point    
Average Humidity    
Maximum Humidity    
Minimum Humidity    
Precipitation 0.01 in 0.17 in (1955)
Month to date precipitation   0.23  
Year to date precipitation   11.05  
Snow 0.20 in 2.80 in (1955)
Month to date snowfall   4.1  
Since 1 July snowfall   12.9  
Snow Depth    
Wind Speed    
Max Wind Speed    
Max Gust Speed    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Dec. 17, 2014 Rise Set
Actual Time 8:06 AM MST 4:41 PM MST
Civil Twilight 7:31 AM MST 5:16 PM MST
Nautical Twilight 6:53 AM MST 5:55 PM MST
Astronomical Twilight 6:16 AM MST 6:31 PM MST
Moon 3:10 AM MST (12/17) 1:59 PM MST (12/17)
Length of Visible Light 9h 44m
Length of Day
8h 34m
Waning Crescent, 20% of the Moon is Illuminated
Dec 17
Waning Crescent
Dec 21
Dec 28
First Quarter
Jan 4
Jan 13
Last Quarter

No daily or hourly history data available