Weather History for Helena, MT

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Saturday, November 12, 2011

  Actual Average Record
Temperature  
Mean Temperature 41 °F 34 °F  
Max Temperature 49 °F 45 °F 75 °F (1999)
Min Temperature 33 °F 24 °F -20 °F (1959)
Degree Days  
Heating Degree Days 24 31  
Month to date heating degree days 383 339  
Since 1 July heating degree days 1058 1247  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 358 406  
Moisture  
Dew Point 20 °F    
Average Humidity 45    
Maximum Humidity 70    
Minimum Humidity 19    
Precipitation  
Precipitation 0.02 in 0.02 in 0.25 in (1944)
Month to date precipitation 0.13 0.19  
Year to date precipitation 12.57 10.52  
Snow  
Snow T in 0.10 in 3.00 in (1944)
Month to date snowfall 2.0 1.4  
Since 1 July snowfall 2.0 5.4  
Since 1 September snowfall 2.0 5.1  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.51 in    
Wind  
Wind Speed 14 mph (WSW)    
Max Wind Speed 36 mph    
Max Gust Speed 46 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Nov. 12, 2011 Rise Set
Actual Time 7:25 AM MST 4:58 PM MST
Civil Twilight 6:52 AM MST 5:30 PM MST
Nautical Twilight 6:16 AM MST 6:07 PM MST
Astronomical Twilight 5:41 AM MST 6:42 PM MST
Moon 6:10 PM MST (11/12) 9:18 AM MST (11/12)
Length of Visible Light 10h 37m
Length of Day
9h 32m
Waning Gibbous, 97% of the Moon is Illuminated
Nov 12
Waning Gibbous
Nov 18
Last Quarter
Nov 24
New
Dec 2
First Quarter
Dec 10
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 48.0 °F - 12.9 °F 24% 29.36 in 10.0 mi SSW 6.9 mph - N/A   Overcast
1:53 AM 46.9 °F - 16.0 °F 29% 29.34 in 10.0 mi Variable 3.5 mph - N/A   Overcast
2:53 AM 46.9 °F - 21.9 °F 37% 29.31 in 10.0 mi SSW 5.8 mph - N/A   Overcast
3:53 AM 44.1 °F 36.2 °F 28.0 °F 53% 29.31 in - South 18.4 mph 26.5 mph N/A   Overcast
4:53 AM 44.6 °F 40.7 °F 28.4 °F 53% 29.30 in - WSW 6.9 mph 18.4 mph N/A Rain Light Rain
5:15 AM 37.4 °F 25.9 °F 33.8 °F 87% 29.35 in - West 25.3 mph 46.0 mph 0.00 in Rain Rain
5:53 AM 34.0 °F 22.7 °F 28.0 °F 79% 29.45 in 10.0 mi West 19.6 mph 26.5 mph 0.02 in   Overcast
6:05 AM 33.8 °F 22.2 °F 28.4 °F 81% 29.40 in 10.0 mi West 20.7 mph 31.1 mph N/A   Overcast
6:53 AM 35.1 °F 25.5 °F 27.0 °F 72% 29.49 in 10.0 mi West 15.0 mph 19.6 mph N/A   Overcast
7:53 AM 36.0 °F 27.5 °F 21.9 °F 57% 29.52 in 10.0 mi WNW 12.7 mph 25.3 mph N/A   Overcast
8:53 AM 35.1 °F 24.8 °F 19.0 °F 52% 29.57 in 10.0 mi WNW 17.3 mph 25.3 mph N/A   Overcast
9:53 AM 35.1 °F 28.6 °F 17.1 °F 48% 29.62 in 10.0 mi West 8.1 mph 17.3 mph N/A   Overcast
10:53 AM 36.0 °F 27.1 °F 15.1 °F 43% 29.65 in 10.0 mi WNW 13.8 mph 21.9 mph N/A   Partly Cloudy
11:53 AM 37.9 °F 28.5 °F 15.1 °F 39% 29.63 in 10.0 mi West 17.3 mph - N/A   Partly Cloudy
12:53 PM 39.0 °F 30.6 °F 14.0 °F 36% 29.62 in 10.0 mi West 15.0 mph 26.5 mph N/A   Partly Cloudy
1:53 PM 37.9 °F 27.6 °F 14.0 °F 38% 29.59 in 10.0 mi WSW 20.7 mph 31.1 mph N/A   Scattered Clouds
2:53 PM 37.0 °F 25.9 °F 16.0 °F 42% 29.60 in 10.0 mi West 23.0 mph 28.8 mph N/A   Clear
3:53 PM 35.1 °F 25.2 °F 17.1 °F 48% 29.59 in 10.0 mi West 16.1 mph 21.9 mph N/A   Overcast
4:53 PM 35.1 °F 27.4 °F 17.1 °F 48% 29.59 in 10.0 mi West 10.4 mph 20.7 mph N/A   Overcast
5:53 PM 35.1 °F 25.5 °F 17.1 °F 48% 29.62 in - West 15.0 mph 19.6 mph N/A   Mostly Cloudy
6:53 PM 35.1 °F 25.5 °F 16.0 °F 46% 29.60 in 10.0 mi WSW 15.0 mph 19.6 mph N/A   Scattered Clouds
7:53 PM 35.1 °F 29.3 °F 18.0 °F 50% 29.58 in - SW 6.9 mph - N/A   Overcast
8:53 PM 33.1 °F - 19.9 °F 59% 29.57 in 10.0 mi Calm Calm - N/A   Overcast
9:53 PM 33.1 °F 28.7 °F 21.0 °F 61% 29.56 in - South 4.6 mph - N/A   Overcast
10:53 PM 34.0 °F - 21.0 °F 59% 29.55 in - Calm Calm - N/A   Overcast
11:53 PM 33.1 °F 30.0 °F 21.9 °F 64% 29.54 in - SE 3.5 mph - N/A   Overcast