Helena, MT

3:11 PM MDT on May 28, 2017 (GMT -0600)
Helena Regional

Weather History for KHLN - December, 2012

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Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 13 °F 21 °F  
Max Temperature 23 °F 31 °F 56 °F (1917)
Min Temperature 3 °F 11 °F -34 °F (1968)
Degree Days  
Heating Degree Days 52 44  
Month to date heating degree days 1243 1335  
Since 1 July heating degree days 2921 3221  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 531 406  
Moisture  
Dew Point 8 °F    
Average Humidity 77    
Maximum Humidity 92    
Minimum Humidity 62    
Precipitation  
Precipitation T in 0.01 in 0.14 in (1959)
Month to date precipitation 0.87 0.40  
Year to date precipitation 9.77 11.22  
Snow  
Snow T in 0.20 in 2.80 in (1969)
Month to date snowfall 7.1 7.3  
Since 1 July snowfall 24.1 16.1  
Snow Depth 4.00 in    
Sea Level Pressure  
Sea Level Pressure 30.30 in    
Wind  
Wind Speed 2 mph (ESE)    
Max Wind Speed 8 mph    
Max Gust Speed 10 mph    
Visibility 8 miles    
Events Fog , Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Astronomy

Dec. 31, 2012 Rise Set
Actual Time 8:12 AM MST 4:50 PM MST
Civil Twilight 7:37 AM MST 5:25 PM MST
Nautical Twilight 6:58 AM MST 6:03 PM MST
Astronomical Twilight 6:22 AM MST 6:40 PM MST
Moon 8:38 PM MST (12/31) 9:43 AM MST (12/31)
Length of Visible Light 9h 48m
Length of Day
8h 38m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
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 14.0 °F - 10.0 °F 84% 30.29 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:53 AM 14.0 °F - 10.0 °F 84% 30.28 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:53 AM 12.0 °F 5.9 °F 9.0 °F 88% 30.30 in 8.0 mi West 3.5 mph - N/A   Clear
3:53 AM 10.0 °F - 7.0 °F 87% 30.30 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 7.0 °F - 3.9 °F 87% 30.30 in 7.0 mi Calm Calm - 0.20 in   Clear
5:53 AM 9.0 °F - 5.0 °F 84% 30.32 in 10.0 mi Calm Calm - N/A   Clear
6:27 AM 6.8 °F - 3.2 °F 85% 30.09 in 2.5 mi Calm Calm - N/A   Partly Cloudy
6:34 AM 6.8 °F - 3.2 °F 85% 30.09 in 10.0 mi Calm Calm - N/A   Clear
6:53 AM 7.0 °F 0.1 °F 3.9 °F 87% 30.33 in 10.0 mi WSW 3.5 mph - N/A   Clear
7:53 AM 6.1 °F - 3.0 °F 87% 30.33 in 10.0 mi Calm Calm - N/A   Clear
8:46 AM 3.2 °F - 1.4 °F 92% 30.11 in 1.8 mi Calm Calm - 0.20 in   Overcast
8:51 AM 3.2 °F - -0.4 °F 85% 30.11 in 0.8 mi Calm Calm - 0.20 in   Mostly Cloudy
8:53 AM 3.9 °F - 1.0 °F 88% 30.37 in 0.5 mi Calm Calm - 0.20 in Fog Light Freezing Fog
9:04 AM 5.0 °F - 3.2 °F 92% 30.12 in 0.5 mi Calm Calm - 0.00 in Fog , Snow Light Snow
9:08 AM 6.8 °F - 3.2 °F 85% 30.12 in 1.0 mi Calm Calm - 0.00 in   Scattered Clouds
9:16 AM 8.6 °F - 6.8 °F 92% 30.12 in 5.0 mi Calm Calm - 0.00 in   Scattered Clouds
9:53 AM 9.0 °F - 7.0 °F 92% 30.37 in 10.0 mi Calm Calm - 0.00 in   Scattered Clouds
10:53 AM 10.9 °F - 8.1 °F 88% 30.36 in 10.0 mi Calm Calm - 0.40 in   Clear
11:53 AM 12.0 °F - 8.1 °F 84% 30.35 in 6.0 mi Calm Calm - N/A   Clear
12:53 PM 19.0 °F 12.3 °F 10.9 °F 71% 30.32 in 10.0 mi ESE 4.6 mph - N/A   Overcast
1:53 PM 21.0 °F 14.6 °F 12.0 °F 68% 30.31 in 10.0 mi ESE 4.6 mph - N/A   Overcast
2:53 PM 21.9 °F 17.2 °F 12.0 °F 66% 30.31 in 10.0 mi East 3.5 mph - N/A   Overcast
3:53 PM 21.9 °F 17.2 °F 12.9 °F 68% 30.32 in 10.0 mi ESE 3.5 mph - N/A   Overcast
4:53 PM 21.9 °F 15.7 °F 10.9 °F 63% 30.35 in 10.0 mi ESE 4.6 mph - N/A   Overcast
5:53 PM 21.0 °F 16.2 °F 12.9 °F 71% 30.35 in 10.0 mi NNE 3.5 mph - N/A   Overcast
6:53 PM 19.9 °F - 12.9 °F 74% 30.37 in 10.0 mi Calm Calm - N/A   Overcast
7:53 PM 19.9 °F 13.4 °F 12.9 °F 74% 30.39 in 10.0 mi NW 4.6 mph - N/A   Overcast
8:53 PM 19.0 °F - 12.0 °F 74% 30.40 in 10.0 mi Calm Calm - N/A   Overcast
9:53 PM 19.9 °F - 12.9 °F 74% 30.39 in 10.0 mi Calm Calm - N/A   Overcast
10:53 PM 19.0 °F - 12.9 °F 77% 30.40 in 10.0 mi Calm Calm - N/A   Overcast
11:53 PM 19.9 °F 14.9 °F 12.9 °F 74% 30.41 in 10.0 mi SSE 3.5 mph - N/A   Overcast