Weather History for Helena, MT

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Monday, December 3, 2012

  Actual Average Record
Temperature  
Mean Temperature 40 °F 25 °F  
Max Temperature 46 °F 34 °F 62 °F (1975)
Min Temperature 34 °F 15 °F -26 °F (1880)
Degree Days  
Heating Degree Days 25 40  
Month to date heating degree days 69 120  
Since 1 July heating degree days 1747 2002  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 531 406  
Moisture  
Dew Point 20 °F    
Average Humidity 47    
Maximum Humidity 61    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in 0.02 in 0.35 in (1926)
Month to date precipitation 0.08 0.05  
Year to date precipitation 8.98 10.87  
Snow  
Snow 0.00 in 0.20 in 5.90 in (1948)
Month to date snowfall 0.0 0.7  
Since 1 July snowfall 17.0 9.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.06 in    
Wind  
Wind Speed 11 mph (SW)    
Max Wind Speed 28 mph    
Max Gust Speed 37 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 03, 2012 Rise Set
Actual Time 7:54 AM MST 4:41 PM MST
Civil Twilight 7:20 AM MST 5:15 PM MST
Nautical Twilight 6:42 AM MST 5:53 PM MST
Astronomical Twilight 6:05 AM MST 6:30 PM MST
Moon 9:42 PM MST (12/3) 11:10 AM MST (12/3)
Length of Visible Light 9h 55m
Length of Day
8h 46m
Waning Gibbous, 77% of the Moon is Illuminated
Dec 3
Waning Gibbous
Dec 6
Last Quarter
Dec 13
New
Dec 19
First Quarter
Dec 28
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 37.0 °F 32.4 °F 19.0 °F 48% 29.84 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
1:53 AM 36.0 °F - 19.9 °F 52% 29.87 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:53 AM 37.0 °F 33.3 °F 21.0 °F 52% 29.92 in 10.0 mi WSW 4.6 mph - N/A   Overcast
3:53 AM 34.0 °F 28.8 °F 21.0 °F 59% 29.98 in 10.0 mi West 5.8 mph - N/A   Partly Cloudy
4:53 AM 36.0 °F 31.1 °F 19.9 °F 52% 29.98 in 10.0 mi SW 5.8 mph - N/A   Scattered Clouds
5:53 AM 37.9 °F 30.0 °F 19.9 °F 48% 29.98 in 10.0 mi SSW 12.7 mph - N/A   Scattered Clouds
6:53 AM 37.9 °F 31.5 °F 19.9 °F 48% 30.01 in 10.0 mi SSW 9.2 mph - N/A   Partly Cloudy
7:53 AM 36.0 °F 29.6 °F 19.9 °F 52% 30.03 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
8:53 AM 37.9 °F 30.5 °F 19.0 °F 47% 30.03 in 10.0 mi SW 11.5 mph - N/A   Clear
9:53 AM 41.0 °F 34.7 °F 19.0 °F 41% 30.02 in 10.0 mi SW 10.4 mph - N/A   Clear
10:53 AM 44.1 °F 35.7 °F 19.0 °F 37% 30.04 in 10.0 mi WSW 20.7 mph 25.3 mph N/A   Clear
11:53 AM 44.1 °F 37.7 °F 18.0 °F 35% 30.03 in 10.0 mi West 12.7 mph 33.4 mph N/A   Clear
12:53 PM 45.0 °F 37.6 °F 19.0 °F 36% 30.05 in 10.0 mi WSW 17.3 mph 27.6 mph N/A   Scattered Clouds
1:53 PM 46.0 °F 38.3 °F 19.9 °F 35% 30.04 in 10.0 mi West 20.7 mph 34.5 mph N/A   Clear
2:53 PM 44.1 °F 34.8 °F 21.0 °F 40% 30.06 in 10.0 mi West 25.3 mph 33.4 mph N/A   Scattered Clouds
3:53 PM 43.0 °F 35.4 °F 19.9 °F 40% 30.09 in 10.0 mi West 16.1 mph 27.6 mph N/A   Clear
4:53 PM 42.1 °F 35.7 °F 18.0 °F 38% 30.12 in 10.0 mi SSW 11.5 mph 25.3 mph N/A   Clear
5:53 PM 41.0 °F 35.8 °F 18.0 °F 40% 30.14 in 10.0 mi WSW 8.1 mph - N/A   Clear
6:53 PM 36.0 °F - 19.0 °F 50% 30.19 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 39.9 °F 34.5 °F 19.9 °F 45% 30.20 in 10.0 mi South 8.1 mph - N/A   Partly Cloudy
8:53 PM 39.0 °F 33.4 °F 21.0 °F 49% 30.19 in 10.0 mi WSW 8.1 mph - N/A   Clear
9:53 PM 39.0 °F 30.6 °F 21.9 °F 50% 30.19 in 10.0 mi South 15.0 mph - N/A   Clear
10:53 PM 39.2 °F 32.0 °F 21.2 °F 49% 30.10 in 10.0 mi SSE 11.5 mph - N/A   Scattered Clouds
11:53 PM 39.0 °F 32.8 °F 21.0 °F 49% 30.19 in 10.0 mi South 9.2 mph - N/A   Clear