Weather History for Helena, MT

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Tuesday, March 12, 2013

  Actual Average Record
Temperature  
Mean Temperature 36 °F 35 °F  
Max Temperature 51 °F 47 °F 74 °F (2007)
Min Temperature 20 °F 23 °F -12 °F (1950)
Degree Days  
Heating Degree Days 29 30  
Month to date heating degree days 359 382  
Since 1 July heating degree days 5478 5943  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 21 °F    
Average Humidity 62    
Maximum Humidity 88    
Minimum Humidity 36    
Precipitation  
Precipitation 0.00 in 0.02 in 0.39 in (2005)
Month to date precipitation 0.05 0.19  
Year to date precipitation 0.72 0.85  
Snow  
Snow 0.00 in 0.20 in 4.00 in (1866)
Month to date snowfall 0.1 2.4  
Since 1 July snowfall 35.8 29.7  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.26 in    
Wind  
Wind Speed 5 mph (WNW)    
Max Wind Speed 18 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Mar. 12, 2013 Rise Set
Actual Time 7:45 AM MDT 7:29 PM MDT
Civil Twilight 7:15 AM MDT 8:00 PM MDT
Nautical Twilight 6:40 AM MDT 8:35 PM MDT
Astronomical Twilight 6:05 AM MDT 9:11 PM MDT
Moon 7:48 AM MDT (3/12) 8:56 PM MDT (3/12)
Length of Visible Light 12h 44m
Length of Day
11h 44m
New Moon, 1% of the Moon is Illuminated
Mar 12
New Moon
Mar 19
First Quarter
Mar 27
Full
Apr 2
Last Quarter
Apr 10
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 25.0 °F - 19.0 °F 78% 30.39 in 10.0 mi Calm Calm - N/A   Clear
1:53 AM 24.1 °F - 18.0 °F 77% 30.40 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 24.1 °F 19.7 °F 18.0 °F 77% 30.38 in 10.0 mi SW 3.5 mph - N/A   Clear
3:53 AM 21.0 °F 16.2 °F 17.1 °F 85% 30.38 in 10.0 mi ENE 3.5 mph - N/A   Mostly Cloudy
4:53 AM 21.9 °F - 18.0 °F 85% 30.37 in 10.0 mi Calm Calm - N/A   Overcast
5:53 AM 19.9 °F 14.9 °F 16.0 °F 85% 30.39 in 10.0 mi WNW 3.5 mph - N/A   Mostly Cloudy
6:53 AM 21.9 °F 17.2 °F 18.0 °F 85% 30.37 in 10.0 mi West 3.5 mph - N/A   Overcast
7:53 AM 23.0 °F 18.4 °F 19.0 °F 85% 30.36 in 10.0 mi WNW 3.5 mph - N/A   Overcast
8:53 AM 24.1 °F 19.7 °F 18.0 °F 77% 30.36 in 10.0 mi NW 3.5 mph - N/A   Overcast
9:53 AM 25.0 °F 20.7 °F 19.0 °F 78% 30.36 in 10.0 mi North 3.5 mph - N/A   Overcast
10:53 AM 27.0 °F - 19.9 °F 75% 30.34 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:53 AM 32.0 °F - 19.0 °F 59% 30.31 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
12:53 PM 34.0 °F - 19.0 °F 54% 30.28 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:53 PM 39.0 °F 36.8 °F 21.0 °F 49% 30.23 in 10.0 mi ESE 3.5 mph - N/A   Mostly Cloudy
2:53 PM 45.0 °F 42.6 °F 21.9 °F 40% 30.18 in 10.0 mi East 4.6 mph - N/A   Overcast
3:53 PM 46.9 °F - 21.0 °F 36% 30.16 in 10.0 mi East 5.8 mph - N/A   Overcast
4:53 PM 46.9 °F - 21.0 °F 36% 30.15 in 10.0 mi East 8.1 mph - N/A   Overcast
5:53 PM 46.9 °F - 23.0 °F 39% 30.14 in 10.0 mi East 5.8 mph - N/A   Overcast
6:53 PM 50.0 °F - 25.0 °F 38% 30.12 in 10.0 mi Variable 4.6 mph - N/A   Mostly Cloudy
7:53 PM 50.0 °F - 28.0 °F 43% 30.13 in 10.0 mi WSW 12.7 mph - N/A   Mostly Cloudy
8:53 PM 48.9 °F - 27.0 °F 43% 30.13 in 10.0 mi WSW 10.4 mph - N/A   Overcast
9:53 PM 48.9 °F - 27.0 °F 43% 30.14 in 10.0 mi WSW 13.8 mph - N/A   Clear
10:53 PM 48.0 °F - 27.0 °F 44% 30.16 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 46.0 °F 41.4 °F 28.0 °F 50% 30.17 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy