Weather History for Helena, MT

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Friday, April 12, 2013

  Actual Average Record
Temperature  
Mean Temperature 40 °F 44 °F  
Max Temperature 53 °F 57 °F 77 °F (1904)
Min Temperature 27 °F 31 °F 6 °F (1881)
Degree Days  
Heating Degree Days 25 21  
Month to date heating degree days 261 270  
Since 1 July heating degree days 6241 6722  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 23 °F    
Average Humidity 51    
Maximum Humidity 75    
Minimum Humidity 26    
Precipitation  
Precipitation T in 0.03 in 0.51 in (1986)
Month to date precipitation 0.39 0.34  
Year to date precipitation 1.15 1.59  
Snow  
Snow 0.00 in 0.20 in 7.20 in (1986)
Month to date snowfall T 1.7  
Since 1 July snowfall 36.1 35.2  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.95 in    
Wind  
Wind Speed 5 mph (North)    
Max Wind Speed 16 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Apr. 12, 2013 Rise Set
Actual Time 6:45 AM MDT 8:12 PM MDT
Civil Twilight 6:14 AM MDT 8:43 PM MDT
Nautical Twilight 5:36 AM MDT 9:22 PM MDT
Astronomical Twilight 4:55 AM MDT 10:03 PM MDT
Moon 7:50 AM MDT (4/12) 10:55 PM MDT (4/12)
Length of Visible Light 14h 29m
Length of Day
13h 26m
Waxing Crescent, 5% of the Moon is Illuminated
Apr 12
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
12:53 AM 37.0 °F 31.0 °F 24.1 °F 59% 30.06 in 10.0 mi WNW 8.1 mph - N/A   Overcast
1:53 AM 36.0 °F 30.3 °F 23.0 °F 59% 30.07 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
2:53 AM 35.1 °F 29.3 °F 23.0 °F 61% 30.07 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
3:53 AM 36.0 °F 31.1 °F 21.9 °F 57% 30.08 in 10.0 mi NW 5.8 mph - N/A   Mostly Cloudy
4:53 AM 32.0 °F 28.7 °F 23.0 °F 69% 30.09 in 10.0 mi South 3.5 mph - N/A   Clear
5:53 AM 30.9 °F 26.2 °F 21.9 °F 69% 30.11 in 10.0 mi NNW 4.6 mph - N/A   Clear
6:53 AM 30.0 °F - 21.9 °F 72% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
7:53 AM 34.0 °F - 26.1 °F 73% 30.14 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:53 AM 36.0 °F - 26.1 °F 67% 30.15 in 9.0 mi Calm Calm - 0.00 in Snow Light Snow
9:53 AM 36.0 °F - 28.0 °F 73% 30.15 in 9.0 mi Calm Calm - 0.00 in   Overcast
10:53 AM 41.0 °F 38.0 °F 28.0 °F 60% 30.12 in 10.0 mi NNE 4.6 mph - N/A   Mostly Cloudy
11:53 AM 44.1 °F - 25.0 °F 47% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
12:53 PM 46.0 °F 43.9 °F 21.9 °F 39% 30.03 in 10.0 mi ESE 4.6 mph - N/A   Partly Cloudy
1:53 PM 48.9 °F - 23.0 °F 36% 29.99 in 10.0 mi NE 11.5 mph 16.1 mph N/A   Clear
2:53 PM 50.0 °F - 21.9 °F 33% 29.95 in 10.0 mi East 9.2 mph 16.1 mph N/A   Clear
3:53 PM 48.9 °F - 23.0 °F 36% 29.91 in 10.0 mi ENE 15.0 mph - N/A   Clear
4:53 PM 50.0 °F - 21.0 °F 32% 29.87 in 10.0 mi NE 11.5 mph - N/A   Partly Cloudy
5:53 PM 53.1 °F - 19.0 °F 26% 29.82 in 10.0 mi NE 9.2 mph - N/A   Clear
6:53 PM 51.1 °F - 18.0 °F 27% 29.79 in 10.0 mi North 5.8 mph - N/A   Mostly Cloudy
7:53 PM 48.0 °F - 19.9 °F 33% 29.75 in 10.0 mi West 5.8 mph - N/A   Overcast
8:53 PM 46.9 °F - 19.9 °F 34% 29.72 in 10.0 mi WSW 6.9 mph - N/A   Mostly Cloudy
9:53 PM 45.0 °F 41.8 °F 23.0 °F 42% 29.69 in 10.0 mi WNW 5.8 mph - N/A   Mostly Cloudy
10:53 PM 44.1 °F - 24.1 °F 45% 29.66 in 10.0 mi Calm Calm - N/A   Overcast
11:53 PM 43.0 °F 41.3 °F 24.1 °F 47% 29.63 in 10.0 mi East 3.5 mph - N/A   Overcast