Weather History for Helena, MT

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Monday, January 2, 2012

  Actual Average Record
Temperature  
Mean Temperature 31 °F 21 °F  
Max Temperature 41 °F 31 °F 57 °F (1939)
Min Temperature 21 °F 11 °F -26 °F (1950)
Degree Days  
Heating Degree Days 34 44  
Month to date heating degree days 71 88  
Since 1 July heating degree days 2945 3309  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 21 °F    
Average Humidity 67    
Maximum Humidity 88    
Minimum Humidity 45    
Precipitation  
Precipitation 0.00 in 0.01 in 1.06 in (1884)
Month to date precipitation 0.00 0.02  
Year to date precipitation 0.00 0.02  
Snow  
Snow 0.00 in 0.20 in 10.60 in (1884)
Month to date snowfall 0.0 0.4  
Since 1 July snowfall 12.9 16.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.39 in    
Wind  
Wind Speed 2 mph (WNW)    
Max Wind Speed 9 mph    
Max Gust Speed 10 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Jan. 02, 2012 Rise Set
Actual Time 8:12 AM MST 4:51 PM MST
Civil Twilight 7:37 AM MST 5:26 PM MST
Nautical Twilight 6:59 AM MST 6:04 PM MST
Astronomical Twilight 6:22 AM MST 6:41 PM MST
Moon 12:18 PM MST (1/2) 1:58 AM MST (1/2)
Length of Visible Light 9h 49m
Length of Day
8h 39m
Waxing Gibbous, 64% of the Moon is Illuminated
Jan 2
Waxing Gibbous
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New
Jan 30
First Quarter

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 24.1 °F - 18.0 °F 77% 30.65 in 10.0 mi Calm Calm - N/A   Clear
1:53 AM 25.0 °F - 19.0 °F 78% 30.63 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 25.0 °F - 19.9 °F 81% 30.62 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 24.1 °F - 19.0 °F 81% 30.60 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 23.0 °F - 19.0 °F 85% 30.58 in 10.0 mi Calm Calm - N/A   Clear
5:53 AM 24.1 °F - 19.0 °F 81% 30.57 in 10.0 mi Calm Calm - N/A   Clear
6:53 AM 24.1 °F 19.7 °F 19.0 °F 81% 30.55 in 10.0 mi West 3.5 mph - N/A   Clear
7:53 AM 23.0 °F - 19.0 °F 85% 30.54 in 10.0 mi Calm Calm - N/A   Clear
8:53 AM 24.8 °F 20.5 °F 19.4 °F 80% 30.34 in 10.0 mi WSW 3.5 mph - N/A   Clear
9:53 AM 30.0 °F 25.2 °F 21.9 °F 72% 30.51 in 10.0 mi WNW 4.6 mph - N/A   Clear
10:53 AM 32.0 °F 28.7 °F 21.9 °F 66% 30.48 in 10.0 mi North 3.5 mph - N/A   Clear
11:53 AM 35.6 °F 31.7 °F 21.2 °F 56% 30.26 in 10.0 mi NW 4.6 mph - N/A   Clear
12:53 PM 37.9 °F 35.5 °F 21.9 °F 53% 30.36 in 10.0 mi NNW 3.5 mph - N/A   Clear
1:53 PM 41.0 °F 38.0 °F 21.9 °F 47% 30.31 in 10.0 mi NW 4.6 mph - N/A   Clear
2:53 PM 39.0 °F 36.8 °F 21.9 °F 50% 30.29 in 10.0 mi West 3.5 mph - N/A   Clear
3:53 PM 37.9 °F - 21.9 °F 53% 30.26 in 10.0 mi Calm Calm - N/A   Clear
4:53 PM 34.0 °F - 23.0 °F 64% 30.25 in 10.0 mi Calm Calm - N/A   Clear
5:53 PM 33.1 °F - 23.0 °F 66% 30.24 in 10.0 mi Calm Calm - N/A   Clear
6:53 PM 33.1 °F 30.0 °F 23.0 °F 66% 30.22 in 10.0 mi SW 3.5 mph - N/A   Clear
7:53 PM 28.0 °F 22.8 °F 21.9 °F 78% 30.22 in 10.0 mi West 4.6 mph - N/A   Clear
8:53 PM 28.9 °F 25.2 °F 21.9 °F 75% 30.21 in 10.0 mi North 3.5 mph - N/A   Clear
9:53 PM 32.0 °F 27.5 °F 23.0 °F 69% 30.18 in 10.0 mi WSW 4.6 mph - N/A   Clear
10:53 PM 25.0 °F 20.7 °F 21.0 °F 85% 30.20 in 10.0 mi North 3.5 mph - N/A   Clear
11:53 PM 33.1 °F 26.9 °F 21.9 °F 64% 30.17 in 10.0 mi SW 6.9 mph - N/A   Partly Cloudy