Weather History for Helena, MT

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Friday, December 13, 2013

  Actual Average Record
Temperature  
Mean Temperature 32 °F 22 °F  
Max Temperature 43 °F 31 °F 58 °F (1924)
Min Temperature 21 °F 12 °F -22 °F (1919)
Degree Days  
Heating Degree Days 33 43  
Month to date heating degree days 678 542  
Since 1 July heating degree days 2469 2424  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 589 406  
Moisture  
Dew Point 24 °F    
Average Humidity 65    
Maximum Humidity 81    
Minimum Humidity 49    
Precipitation  
Precipitation 0.00 in 0.01 in 0.48 in (1917)
Month to date precipitation 0.20 0.18  
Year to date precipitation 10.49 11.00  
Snow  
Snow 0.00 in 0.20 in 9.80 in (1991)
Month to date snowfall 0.6 3.1  
Since 1 July snowfall 4.1 11.9  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 30.20 in    
Wind  
Wind Speed 9 mph (West)    
Max Wind Speed 21 mph    
Max Gust Speed 26 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 13, 2013 Rise Set
Actual Time 8:04 AM MST 4:40 PM MST
Civil Twilight 7:29 AM MST 5:15 PM MST
Nautical Twilight 6:50 AM MST 5:53 PM MST
Astronomical Twilight 6:13 AM MST 6:30 PM MST
Moon 2:34 PM MST (12/13) 4:21 AM MST (12/13)
Length of Visible Light 9h 46m
Length of Day
8h 36m
Waxing Gibbous, 88% of the Moon is Illuminated
Dec 13
Waxing Gibbous
Dec 17
Full
Dec 25
Last Quarter
Jan 1
New
Jan 7
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 23.0 °F - 17.1 °F 78% 30.12 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:53 AM 24.1 °F 17.0 °F 18.0 °F 77% 30.11 in 10.0 mi Variable 5.8 mph - N/A   Mostly Cloudy
2:53 AM 36.0 °F 29.0 °F 23.0 °F 59% 30.08 in 10.0 mi West 9.2 mph 20.7 mph N/A   Overcast
3:53 AM 34.0 °F 28.0 °F 21.9 °F 61% 30.09 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
4:53 AM 36.0 °F 29.0 °F 23.0 °F 59% 30.11 in 10.0 mi WSW 9.2 mph - N/A   Overcast
5:53 AM 35.1 °F 29.3 °F 24.1 °F 64% 30.12 in 10.0 mi West 6.9 mph - N/A   Overcast
6:53 AM 35.1 °F 27.9 °F 25.0 °F 67% 30.14 in 10.0 mi West 9.2 mph - N/A   Overcast
7:53 AM 35.1 °F 28.6 °F 25.0 °F 67% 30.17 in 10.0 mi WSW 8.1 mph - N/A   Overcast
8:53 AM 36.0 °F 29.0 °F 26.1 °F 67% 30.19 in 10.0 mi WSW 9.2 mph - N/A   Mostly Cloudy
9:53 AM 36.0 °F 25.6 °F 25.0 °F 64% 30.19 in 10.0 mi West 18.4 mph 24.2 mph N/A   Clear
10:53 AM 39.0 °F 30.6 °F 25.0 °F 57% 30.20 in 10.0 mi West 15.0 mph 24.2 mph N/A   Mostly Cloudy
11:53 AM 42.1 °F 35.7 °F 25.0 °F 51% 30.19 in 10.0 mi West 11.5 mph - N/A   Overcast
12:53 PM 39.9 °F 32.1 °F 25.0 °F 55% 30.20 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
1:53 PM 41.0 °F 32.5 °F 25.0 °F 53% 30.19 in 10.0 mi West 17.3 mph 25.3 mph N/A   Mostly Cloudy
2:53 PM 43.0 °F 37.2 °F 25.0 °F 49% 30.17 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
3:53 PM 39.9 °F 34.5 °F 25.0 °F 55% 30.20 in 10.0 mi West 8.1 mph - N/A   Overcast
4:53 PM 39.0 °F 34.0 °F 26.1 °F 60% 30.23 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
5:53 PM 39.0 °F 33.4 °F 26.1 °F 60% 30.24 in 10.0 mi West 8.1 mph 21.9 mph N/A   Scattered Clouds
6:53 PM 37.0 °F 31.6 °F 26.1 °F 65% 30.27 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
7:53 PM 37.9 °F 30.0 °F 26.1 °F 62% 30.28 in 10.0 mi West 12.7 mph 18.4 mph N/A   Partly Cloudy
8:53 PM 36.0 °F 29.0 °F 27.0 °F 70% 30.32 in 10.0 mi NW 9.2 mph - N/A   Partly Cloudy
9:53 PM 35.1 °F - 26.1 °F 70% 30.32 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:53 PM 33.1 °F 27.7 °F 25.0 °F 72% 30.32 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
11:53 PM 35.1 °F - 25.0 °F 67% 30.33 in 10.0 mi Calm Calm - N/A   Mostly Cloudy