Weather History for Helena, MT

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Friday, November 30, 2012

  Actual Average Record
Temperature  
Mean Temperature 45 °F 26 °F  
Max Temperature 53 °F 36 °F 63 °F (1999)
Min Temperature 36 °F 16 °F -15 °F (1952)
Degree Days  
Heating Degree Days 20 39  
Month to date heating degree days 903 975  
Since 1 July heating degree days 1678 1882  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 531 406  
Moisture  
Dew Point 32 °F    
Average Humidity 69    
Maximum Humidity 89    
Minimum Humidity 49    
Precipitation  
Precipitation 0.03 in 0.02 in 0.45 in (1893)
Month to date precipitation 1.78 0.49  
Year to date precipitation 8.90 10.82  
Snow  
Snow 0.00 in 0.20 in 5.00 in (1919)
Month to date snowfall 17.0 4.8  
Since 1 July snowfall 17.0 8.8  
Since 1 September snowfall 17.0 8.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.72 in    
Wind  
Wind Speed 4 mph (SW)    
Max Wind Speed 18 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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Date:

Astronomy

Nov. 30, 2012 Rise Set
Actual Time 7:51 AM MST 4:42 PM MST
Civil Twilight 7:16 AM MST 5:16 PM MST
Nautical Twilight 6:38 AM MST 5:54 PM MST
Astronomical Twilight 6:02 AM MST 6:30 PM MST
Moon 6:41 PM MST (11/30) 9:25 AM MST (11/30)
Length of Visible Light 10h 00m
Length of Day
8h 51m
Waning Gibbous, 96% of the Moon is Illuminated
Nov 30
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 33.3 °F 27.0 °F 67% 29.85 in 10.0 mi West 4.6 mph - N/A   Clear
1:53 AM 46.0 °F 40.2 °F 28.0 °F 50% 29.81 in 10.0 mi SW 12.7 mph 17.3 mph N/A   Clear
2:53 AM 37.9 °F 35.5 °F 28.0 °F 68% 29.82 in 10.0 mi Variable 3.5 mph - N/A   Clear
3:53 AM 44.1 °F - 28.9 °F 55% 29.77 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:53 AM 45.0 °F 41.2 °F 28.0 °F 52% 29.76 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
5:53 AM 45.0 °F - 28.9 °F 53% 29.73 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
6:53 AM 44.1 °F 41.5 °F 28.9 °F 55% 29.71 in 10.0 mi ESE 4.6 mph - N/A   Scattered Clouds
7:53 AM 46.0 °F 44.8 °F 28.9 °F 51% 29.70 in 10.0 mi NE 3.5 mph - N/A   Mostly Cloudy
8:53 AM 42.1 °F 38.4 °F 30.0 °F 62% 29.70 in 10.0 mi NW 5.8 mph - N/A   Overcast
9:53 AM 44.1 °F - 30.0 °F 58% 29.69 in 10.0 mi Calm Calm - N/A   Overcast
10:53 AM 46.9 °F - 30.9 °F 54% 29.65 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
11:53 AM 46.9 °F - 30.9 °F 54% 29.65 in 10.0 mi Variable 4.6 mph - N/A   Overcast
12:53 PM 45.0 °F 42.6 °F 32.0 °F 60% 29.66 in 10.0 mi Variable 4.6 mph - N/A   Overcast
1:53 PM 48.0 °F - 33.1 °F 56% 29.62 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:53 PM 48.0 °F - 39.0 °F 71% 29.68 in 7.0 mi SW 12.7 mph - 0.02 in   Overcast
3:53 PM 46.9 °F - 37.9 °F 71% 29.66 in 10.0 mi ESE 6.9 mph - 0.01 in   Partly Cloudy
4:53 PM 42.8 °F - 37.4 °F 81% 29.64 in 10.0 mi Calm Calm - N/A   Clear
5:53 PM 43.0 °F 41.3 °F 36.0 °F 76% 29.70 in 10.0 mi Variable 3.5 mph - N/A   Partly Cloudy
6:53 PM 39.0 °F 36.8 °F 34.0 °F 82% 29.73 in 10.0 mi North 3.5 mph - N/A   Clear
7:53 PM 37.9 °F 31.5 °F 33.1 °F 83% 29.75 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
8:53 PM 39.2 °F 34.2 °F 33.8 °F 81% 29.68 in 10.0 mi WSW 6.9 mph - N/A   Partly Cloudy
9:53 PM 37.0 °F - 33.1 °F 86% 29.78 in 10.0 mi Calm Calm - N/A   Clear
10:53 PM 36.0 °F - 32.0 °F 86% 29.78 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 37.9 °F - 33.1 °F 83% 29.77 in 10.0 mi Calm Calm - N/A   Clear