Weather History for Helena, MT

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Wednesday, April 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 31 °F 45 °F  
Max Temperature 41 °F 58 °F 80 °F (1994)
Min Temperature 20 °F 32 °F 9 °F (1896)
Degree Days  
Heating Degree Days 34 20  
Month to date heating degree days 432 372  
Since 1 July heating degree days 6412 6824  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 14 °F    
Average Humidity 54    
Maximum Humidity 77    
Minimum Humidity 30    
Precipitation  
Precipitation T in 0.03 in 0.56 in (1885)
Month to date precipitation 0.54 0.51  
Year to date precipitation 1.30 1.76  
Snow  
Snow 0.00 in 0.10 in 5.60 in (1885)
Month to date snowfall 1.6 2.3  
Since 1 July snowfall 37.7 35.8  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.39 in    
Wind  
Wind Speed 6 mph (NW)    
Max Wind Speed 15 mph    
Max Gust Speed 22 mph    
Visibility 10 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Apr. 17, 2013 Rise Set
Actual Time 6:36 AM MDT 8:19 PM MDT
Civil Twilight 6:04 AM MDT 8:51 PM MDT
Nautical Twilight 5:25 AM MDT 9:30 PM MDT
Astronomical Twilight 4:43 AM MDT 10:12 PM MDT
Moon 11:47 AM MDT (4/17) 2:06 AM MDT (4/17)
Length of Visible Light 14h 46m
Length of Day
13h 42m
Waxing Crescent, 43% of the Moon is Illuminated
Apr 17
Waxing Crescent
Apr 18
First Quarter
Apr 25
Full
May 2
Last Quarter
May 9
New

Hourly Weather History & Observations

Time (MDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:28 AM 24.8 °F 17.9 °F 17.6 °F 74% 30.28 in 10.0 mi NW 5.8 mph - N/A   Overcast
12:53 AM 24.1 °F 18.2 °F 17.1 °F 75% 30.45 in 10.0 mi NW 4.6 mph - N/A   Overcast
1:00 AM 23.0 °F 15.8 °F 17.6 °F 80% 30.28 in 10.0 mi West 5.8 mph - N/A   Overcast
1:53 AM 21.9 °F 15.7 °F 16.0 °F 78% 30.45 in 10.0 mi West 4.6 mph - N/A   Overcast
2:53 AM 23.0 °F 18.4 °F 16.0 °F 74% 30.44 in 10.0 mi WNW 3.5 mph - N/A   Overcast
3:53 AM 21.0 °F 13.4 °F 15.1 °F 78% 30.45 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
4:53 AM 21.9 °F 15.7 °F 16.0 °F 78% 30.45 in 10.0 mi West 4.6 mph - N/A   Overcast
5:40 AM 21.2 °F 13.6 °F 15.8 °F 80% 30.27 in 10.0 mi West 5.8 mph - N/A   Overcast
5:53 AM 21.9 °F 15.7 °F 16.0 °F 78% 30.44 in 10.0 mi West 4.6 mph - N/A   Overcast
6:53 AM 21.0 °F 14.6 °F 16.0 °F 81% 30.46 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy
7:31 AM 21.2 °F 12.6 °F 15.8 °F 80% 30.28 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
7:53 AM 24.8 °F 16.1 °F 15.8 °F 69% 30.29 in 10.0 mi WNW 8.1 mph - N/A   Overcast
8:03 AM 24.8 °F 17.9 °F 15.8 °F 69% 30.29 in 7.0 mi NW 5.8 mph - 0.00 in Snow Light Snow
8:31 AM 24.8 °F 15.3 °F 15.8 °F 69% 30.29 in 4.0 mi WNW 9.2 mph - 0.00 in   Haze
8:53 AM 26.1 °F 18.4 °F 16.0 °F 66% 30.47 in 10.0 mi West 6.9 mph - 0.00 in   Mostly Cloudy
9:53 AM 27.0 °F 18.7 °F 14.0 °F 58% 30.47 in 10.0 mi NW 8.1 mph - N/A   Mostly Cloudy
10:53 AM 30.0 °F 21.7 °F 14.0 °F 51% 30.46 in 10.0 mi North 9.2 mph - N/A   Mostly Cloudy
11:53 AM 30.0 °F 21.7 °F 10.9 °F 45% 30.45 in 10.0 mi NNW 9.2 mph - N/A   Overcast
12:53 PM 33.1 °F 24.9 °F 12.0 °F 42% 30.43 in 10.0 mi North 10.4 mph 19.6 mph N/A   Partly Cloudy
1:53 PM 36.0 °F 30.3 °F 8.1 °F 31% 30.42 in 10.0 mi Variable 6.9 mph 17.3 mph N/A   Mostly Cloudy
2:53 PM 39.0 °F 33.4 °F 10.0 °F 30% 30.39 in 10.0 mi NNE 8.1 mph - N/A   Partly Cloudy
3:53 PM 39.9 °F 33.9 °F 10.9 °F 31% 30.38 in 10.0 mi NNE 9.2 mph 18.4 mph N/A   Clear
4:53 PM 39.9 °F 36.7 °F 10.0 °F 29% 30.36 in 10.0 mi NNE 4.6 mph - N/A   Clear
5:53 PM 39.9 °F 36.7 °F 10.0 °F 29% 30.36 in 10.0 mi Variable 4.6 mph - N/A   Clear
6:53 PM 39.0 °F 34.0 °F 10.9 °F 32% 30.36 in 10.0 mi NNE 6.9 mph - N/A   Clear
7:53 PM 36.0 °F 30.3 °F 12.0 °F 37% 30.37 in 10.0 mi North 6.9 mph - N/A   Clear
8:53 PM 32.0 °F - 10.9 °F 42% 30.38 in 10.0 mi Calm Calm - N/A   Clear
9:53 PM 30.0 °F 23.2 °F 14.0 °F 51% 30.39 in 10.0 mi WSW 6.9 mph - N/A   Clear
10:53 PM 28.9 °F 23.9 °F 12.9 °F 51% 30.38 in 10.0 mi SSW 4.6 mph - N/A   Clear
11:53 PM 27.0 °F 23.0 °F 14.0 °F 58% 30.38 in 10.0 mi East 3.5 mph - N/A   Clear