Weather History for Helena, MT

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Tuesday, March 19, 2013

  Actual Average Record
Temperature  
Mean Temperature 36 °F 37 °F  
Max Temperature 46 °F 49 °F 71 °F (1997)
Min Temperature 26 °F 25 °F -8 °F (1906)
Degree Days  
Heating Degree Days 29 28  
Month to date heating degree days 534 583  
Since 1 July heating degree days 5653 6144  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 10 °F    
Average Humidity 42    
Maximum Humidity 68    
Minimum Humidity 16    
Precipitation  
Precipitation 0.00 in 0.02 in 0.46 in (1987)
Month to date precipitation 0.09 0.32  
Year to date precipitation 0.76 0.98  
Snow  
Snow 0.00 in 0.20 in 6.60 in (1987)
Month to date snowfall 0.3 3.9  
Since 1 July snowfall 36.0 31.2  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 30.25 in    
Wind  
Wind Speed 8 mph (West)    
Max Wind Speed 18 mph    
Max Gust Speed 23 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Mar. 19, 2013 Rise Set
Actual Time 7:32 AM MDT 7:39 PM MDT
Civil Twilight 7:02 AM MDT 8:09 PM MDT
Nautical Twilight 6:26 AM MDT 8:45 PM MDT
Astronomical Twilight 5:50 AM MDT 9:21 PM MDT
Moon 12:06 PM MDT (3/19) 2:49 AM MDT (3/19)
Length of Visible Light 13h 07m
Length of Day
12h 07m
Waxing Crescent, 50% of the Moon is Illuminated
Mar 19
Waxing Crescent
Mar 27
Full
Apr 2
Last Quarter
Apr 10
New
Apr 18
First Quarter

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 28.9 °F 19.8 °F 17.1 °F 61% 30.12 in 10.0 mi WSW 10.4 mph 21.9 mph N/A   Clear
1:53 AM 28.9 °F 21.9 °F 18.0 °F 64% 30.14 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
2:53 AM 26.1 °F 16.8 °F 17.1 °F 69% 30.18 in 10.0 mi West 9.2 mph - N/A   Clear
3:53 AM 28.0 °F 18.6 °F 17.1 °F 63% 30.18 in 10.0 mi West 10.4 mph - N/A   Clear
4:53 AM 28.0 °F 17.0 °F 17.1 °F 63% 30.19 in 10.0 mi West 13.8 mph - N/A   Clear
5:53 AM 27.0 °F 18.7 °F 16.0 °F 63% 30.23 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
6:53 AM 27.0 °F 18.0 °F 15.1 °F 61% 30.28 in 10.0 mi West 9.2 mph - N/A   Clear
7:53 AM 27.0 °F 19.5 °F 14.0 °F 58% 30.32 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
8:53 AM 30.0 °F 26.5 °F 15.1 °F 54% 30.34 in 10.0 mi NNW 3.5 mph - N/A   Clear
9:53 AM 32.0 °F 23.0 °F 15.1 °F 50% 30.34 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
10:53 AM 34.0 °F 24.6 °F 14.0 °F 44% 30.34 in 10.0 mi West 13.8 mph 18.4 mph N/A   Clear
11:53 AM 36.0 °F 27.5 °F 10.9 °F 36% 30.34 in 10.0 mi WSW 12.7 mph 18.4 mph N/A   Clear
12:53 PM 39.0 °F 31.8 °F 10.0 °F 30% 30.33 in 10.0 mi West 11.5 mph 18.4 mph N/A   Clear
1:53 PM 41.0 °F 34.7 °F 6.1 °F 24% 30.31 in 10.0 mi West 10.4 mph 17.3 mph N/A   Clear
2:53 PM 42.1 °F 34.5 °F 7.0 °F 24% 30.30 in 10.0 mi West 15.0 mph - N/A   Clear
3:53 PM 45.0 °F 39.7 °F 3.0 °F 18% 30.27 in 10.0 mi NW 10.4 mph 17.3 mph N/A   Clear
4:53 PM 45.0 °F 40.6 °F -0.0 °F 15% 30.26 in 10.0 mi NNW 8.1 mph - N/A   Clear
5:53 PM 45.0 °F 42.6 °F -0.0 °F 15% 30.25 in 10.0 mi ESE 4.6 mph - N/A   Clear
6:53 PM 42.1 °F 36.6 °F 3.9 °F 21% 30.24 in 10.0 mi East 9.2 mph - N/A   Clear
7:53 PM 37.9 °F 34.4 °F 8.1 °F 29% 30.22 in 10.0 mi SE 4.6 mph - N/A   Clear
8:53 PM 37.0 °F - 7.0 °F 29% 30.20 in 10.0 mi Calm Calm - N/A   Clear
9:53 PM 30.9 °F - 8.1 °F 38% 30.20 in 10.0 mi Calm Calm - N/A   Clear
10:53 PM 27.0 °F 23.0 °F 9.0 °F 47% 30.19 in 10.0 mi NNW 3.5 mph - N/A   Partly Cloudy
11:53 PM 30.0 °F - 8.1 °F 40% 30.15 in 10.0 mi Calm Calm - N/A   Clear