Weather History for Helena, MT

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Saturday, December 6, 2014

  Actual Average Record
Temperature  
Mean Temperature 30 °F 24 °F  
Max Temperature 44 °F 33 °F 60 °F (1987)
Min Temperature 16 °F 14 °F -30 °F (1972)
Degree Days  
Heating Degree Days 35 42  
Month to date heating degree days 269 244  
Since 1 July heating degree days 1981 2126  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 469 406  
Moisture  
Dew Point 23 °F    
Average Humidity 85    
Maximum Humidity 100    
Minimum Humidity 70    
Precipitation  
Precipitation 0.01 in 0.01 in 0.81 in (1901)
Month to date precipitation 0.03 0.09  
Year to date precipitation 11.46 10.91  
Snow  
Snow 0.00 in 0.30 in 14.00 in (1927)
Month to date snowfall 0.1 1.4  
Since 1 July snowfall 10.9 10.2  
Snow Depth 1.00 in    
Sea Level Pressure  
Sea Level Pressure 30.21 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 20 mph    
Max Gust Speed 28 mph    
Visibility 4 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 06, 2014 Rise Set
Actual Time 7:57 AM MST 4:40 PM MST
Civil Twilight 7:22 AM MST 5:15 PM MST
Nautical Twilight 6:44 AM MST 5:53 PM MST
Astronomical Twilight 6:07 AM MST 6:30 PM MST
Moon 5:23 PM MST (12/6) 7:47 AM MST (12/6)
Length of Visible Light 9h 52m
Length of Day
8h 43m
Full, 100% of the Moon is Illuminated
Dec 6
Full
Dec 14
Last Quarter
Dec 21
New
Dec 28
First Quarter
Jan 4
Full

Hourly Weather History & Observations

Time (MST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:05 AM 24.1 °F 19.7 °F 23.0 °F 96% 30.17 in 1.0 mi South 3.5 mph - N/A   Mist
12:11 AM 24.1 °F 19.7 °F 23.0 °F 96% 30.17 in 2.0 mi South 3.5 mph - N/A   Overcast
12:19 AM 26.1 °F - 24.1 °F 92% 30.17 in 6.0 mi Calm Calm - N/A   Mostly Cloudy
12:27 AM 24.1 °F - 21.9 °F 91% 30.17 in 7.0 mi Calm Calm - N/A   Scattered Clouds
12:46 AM 24.1 °F 19.7 °F 21.9 °F 91% 30.17 in 0.8 mi North 3.5 mph - N/A   Mist
12:53 AM 24.1 °F - 23.0 °F 96% 30.32 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
1:53 AM 21.9 °F - 21.0 °F 96% 30.32 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
2:53 AM 23.0 °F - 21.9 °F 96% 30.32 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
3:53 AM 19.9 °F - 19.0 °F 96% 30.30 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
4:53 AM 21.0 °F - 19.0 °F 92% 30.30 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
5:53 AM 19.9 °F - 17.1 °F 89% 30.30 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
6:03 AM 19.9 °F - 18.0 °F 92% 30.13 in 1.0 mi Calm Calm - N/A   Mist
6:07 AM 19.9 °F - 18.0 °F 92% 30.12 in 2.0 mi Calm Calm - N/A   Mostly Cloudy
6:14 AM 21.0 °F 16.2 °F 17.1 °F 85% 30.12 in 4.0 mi SSE 3.5 mph - N/A   Scattered Clouds
6:53 AM 19.9 °F - 17.1 °F 89% 30.30 in 5.0 mi Calm Calm - N/A   Clear
7:01 AM 19.0 °F - 16.0 °F 88% 30.12 in 2.0 mi Calm Calm - N/A   Partly Cloudy
7:03 AM 19.0 °F - 16.0 °F 88% 30.12 in 0.8 mi Calm Calm - N/A   Mist
7:12 AM 18.0 °F - 16.0 °F 92% 30.12 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
7:53 AM 18.0 °F - 16.0 °F 92% 30.30 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
8:28 AM 17.1 °F 11.7 °F 12.9 °F 84% 30.11 in 1.0 mi ENE 3.5 mph - N/A   Mist
8:40 AM 16.0 °F - 12.9 °F 88% 30.11 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
8:53 AM 17.1 °F - 14.0 °F 88% 30.31 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
9:16 AM 19.9 °F - 16.0 °F 85% 30.12 in 0.8 mi Calm Calm - N/A   Mist
9:31 AM 19.9 °F - 18.0 °F 92% 30.11 in 1.2 mi Calm Calm - N/A   Scattered Clouds
9:37 AM 21.0 °F - 19.0 °F 92% 30.11 in 2.0 mi Calm Calm - N/A   Scattered Clouds
9:53 AM 21.9 °F 17.2 °F 19.9 °F 92% 30.30 in 2.5 mi ESE 3.5 mph - N/A   Clear
10:08 AM 24.1 °F - 21.0 °F 88% 30.11 in 3.0 mi Calm Calm - N/A   Clear
10:53 AM 25.0 °F - 21.0 °F 85% 30.27 in 10.0 mi Calm Calm - N/A   Clear
11:53 AM 25.0 °F - 21.9 °F 88% 30.24 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 27.0 °F - 25.0 °F 92% 30.22 in 3.0 mi Calm Calm - N/A   Overcast
1:53 PM 30.9 °F 27.5 °F 30.0 °F 96% 30.20 in 4.0 mi SSE 3.5 mph - N/A   Overcast
2:53 PM 33.1 °F 28.7 °F 30.0 °F 89% 30.20 in 10.0 mi NW 4.6 mph - N/A   Overcast
3:53 PM 37.4 °F 32.1 °F 32.0 °F 81% 30.07 in 10.0 mi WSW 6.9 mph - N/A   Mostly Cloudy
4:53 PM 42.1 °F 36.1 °F 35.1 °F 76% 30.22 in 10.0 mi WSW 10.4 mph - 0.01 in   Mostly Cloudy
5:53 PM 37.9 °F 33.5 °F 34.0 °F 86% 30.25 in 10.0 mi WSW 5.8 mph - N/A   Overcast
6:53 PM 41.0 °F 35.8 °F 33.1 °F 73% 30.23 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
7:53 PM 33.1 °F 26.9 °F 28.9 °F 85% 30.27 in 10.0 mi NNE 6.9 mph - N/A   Mostly Cloudy
8:53 PM 35.1 °F 31.0 °F 30.0 °F 82% 30.25 in 10.0 mi WSW 4.6 mph - N/A   Clear
9:53 PM 33.1 °F 26.1 °F 28.0 °F 82% 30.27 in 10.0 mi North 8.1 mph - N/A   Mostly Cloudy
10:53 PM 41.0 °F 32.5 °F 32.0 °F 70% 30.23 in 10.0 mi West 17.3 mph 24.2 mph N/A   Scattered Clouds
11:53 PM 43.0 °F 34.8 °F 32.0 °F 65% 30.23 in 10.0 mi West 18.4 mph 26.5 mph N/A   Partly Cloudy