Weather History for Helena, MT

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Monday, November 19, 2012

  Actual Average Record
Temperature  
Mean Temperature 36 °F 31 °F  
Max Temperature 52 °F 41 °F 69 °F (1897)
Min Temperature 20 °F 21 °F -15 °F (1900)
Degree Days  
Heating Degree Days 29 34  
Month to date heating degree days 582 568  
Since 1 July heating degree days 1357 1476  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 531 406  
Moisture  
Dew Point 24 °F    
Average Humidity 61    
Maximum Humidity 84    
Minimum Humidity 38    
Precipitation  
Precipitation 0.00 in 0.02 in 0.48 in (1978)
Month to date precipitation 1.45 0.31  
Year to date precipitation 8.57 10.64  
Snow  
Snow 0.00 in 0.20 in 7.00 in (1978)
Month to date snowfall 17.0 2.6  
Since 1 July snowfall 17.0 6.6  
Since 1 September snowfall 17.0 6.3  
Snow Depth 3.00 in    
Sea Level Pressure  
Sea Level Pressure 30.06 in    
Wind  
Wind Speed 9 mph (SSW)    
Max Wind Speed 28 mph    
Max Gust Speed 38 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Nov. 19, 2012 Rise Set
Actual Time 7:36 AM MST 4:49 PM MST
Civil Twilight 7:03 AM MST 5:23 PM MST
Nautical Twilight 6:26 AM MST 6:00 PM MST
Astronomical Twilight 5:50 AM MST 6:36 PM MST
Moon 12:33 PM MST (11/19) 11:31 PM MST (11/19)
Length of Visible Light 10h 19m
Length of Day
9h 13m
Waxing Crescent, 41% of the Moon is Illuminated
Nov 19
Waxing Crescent
Nov 20
First Quarter
Nov 28
Full
Dec 6
Last Quarter
Dec 13
New

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 27.0 °F 23.0 °F 19.9 °F 75% 30.12 in 10.0 mi WNW 3.5 mph - N/A   Clear
1:53 AM 25.0 °F - 19.0 °F 78% 30.13 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 25.0 °F 20.7 °F 19.0 °F 78% 30.14 in 10.0 mi WNW 3.5 mph - N/A   Clear
3:53 AM 25.0 °F - 19.0 °F 78% 30.11 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 21.9 °F - 18.0 °F 85% 30.12 in 10.0 mi Calm Calm - N/A   Clear
5:53 AM 23.0 °F 17.0 °F 18.0 °F 81% 30.10 in 10.0 mi Variable 4.6 mph - N/A   Clear
6:53 AM 21.9 °F 14.5 °F 17.1 °F 82% 30.13 in 10.0 mi West 5.8 mph - N/A   Clear
7:53 AM 25.0 °F 20.7 °F 19.0 °F 78% 30.13 in 10.0 mi Variable 3.5 mph - N/A   Clear
8:53 AM 27.0 °F - 18.0 °F 69% 30.15 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 33.1 °F 30.0 °F 21.9 °F 64% 30.12 in 10.0 mi NW 3.5 mph - N/A   Clear
10:53 AM 35.1 °F 32.2 °F 24.1 °F 64% 30.12 in 10.0 mi NW 3.5 mph - N/A   Clear
11:53 AM 42.1 °F - 26.1 °F 53% 30.08 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 50.0 °F - 27.0 °F 41% 30.03 in 10.0 mi South 20.7 mph 29.9 mph N/A   Clear
1:53 PM 51.1 °F - 26.1 °F 38% 30.02 in 10.0 mi South 15.0 mph 25.3 mph N/A   Clear
2:53 PM 51.1 °F - 27.0 °F 39% 30.01 in 10.0 mi South 15.0 mph 26.5 mph N/A   Clear
3:53 PM 50.0 °F - 28.0 °F 43% 30.01 in 10.0 mi South 13.8 mph 23.0 mph N/A   Clear
4:53 PM 48.9 °F - 28.0 °F 44% 30.03 in 10.0 mi South 13.8 mph 27.6 mph N/A   Clear
5:53 PM 46.9 °F - 28.9 °F 50% 30.04 in 10.0 mi South 10.4 mph - N/A   Clear
6:53 PM 48.0 °F - 28.9 °F 48% 30.03 in 10.0 mi South 13.8 mph 21.9 mph N/A   Clear
7:53 PM 48.9 °F - 28.9 °F 46% 30.00 in 10.0 mi South 9.2 mph 18.4 mph N/A   Clear
8:53 PM 48.9 °F - 28.9 °F 46% 29.98 in 10.0 mi South 18.4 mph 29.9 mph N/A   Clear
9:53 PM 50.0 °F - 28.9 °F 44% 29.96 in 10.0 mi South 18.4 mph 25.3 mph N/A   Clear
10:53 PM 50.0 °F - 28.9 °F 44% 29.94 in 10.0 mi SSW 15.0 mph 26.5 mph N/A   Clear
11:53 PM 50.0 °F - 28.9 °F 44% 29.92 in 10.0 mi South 13.8 mph 38.0 mph N/A   Clear