Weather History for Helena, MT

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Thursday, March 7, 2013

  Actual Average Record
Temperature  
Mean Temperature 37 °F 33 °F  
Max Temperature 48 °F 45 °F 66 °F (1986)
Min Temperature 25 °F 22 °F -24 °F (1951)
Degree Days  
Heating Degree Days 28 32  
Month to date heating degree days 219 229  
Since 1 July heating degree days 5338 5790  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 24 °F    
Average Humidity 64    
Maximum Humidity 100    
Minimum Humidity 28    
Precipitation  
Precipitation 0.00 in 0.02 in 0.36 in (2003)
Month to date precipitation 0.05 0.11  
Year to date precipitation 0.72 0.77  
Snow  
Snow 0.00 in 0.20 in 5.00 in (1888)
Month to date snowfall 0.1 1.4  
Since 1 July snowfall 35.8 28.7  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 29.96 in    
Wind  
Wind Speed 5 mph (WSW)    
Max Wind Speed 16 mph    
Max Gust Speed 21 mph    
Visibility 6 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Mar. 07, 2013 Rise Set
Actual Time 6:55 AM MST 6:22 PM MST
Civil Twilight 6:25 AM MST 6:53 PM MST
Nautical Twilight 5:50 AM MST 7:28 PM MST
Astronomical Twilight 5:15 AM MST 8:03 PM MST
Moon 4:11 AM MST (3/7) 2:02 PM MST (3/7)
Length of Visible Light 12h 27m
Length of Day
11h 27m
Waning Crescent, 19% of the Moon is Illuminated
Mar 7
Waning Crescent
Mar 11
New
Mar 19
First Quarter
Mar 27
Full
Apr 2
Last Quarter

Hourly Weather History & Observations

Time (MST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:26 AM 30.2 °F - 30.2 °F 100% 29.76 in 2.5 mi Calm Calm - N/A   Mostly Cloudy
12:41 AM 30.2 °F - 30.2 °F 100% 29.76 in 3.0 mi Calm Calm - N/A   Overcast
12:53 AM 32.0 °F - 30.0 °F 92% 29.89 in 4.0 mi Calm Calm - N/A   Overcast
1:17 AM 30.2 °F 26.7 °F 30.2 °F 100% 29.78 in 3.0 mi SE 3.5 mph - N/A   Scattered Clouds
1:31 AM 30.2 °F 25.4 °F 30.2 °F 100% 29.78 in 1.5 mi South 4.6 mph - N/A   Partly Cloudy
1:33 AM 30.2 °F 25.4 °F 30.2 °F 100% 29.78 in 1.0 mi South 4.6 mph - N/A   Mist
1:40 AM 30.2 °F 25.4 °F 30.2 °F 100% 29.79 in 0.8 mi South 4.6 mph - N/A   Mist
1:44 AM 30.2 °F 26.7 °F 30.2 °F 100% 29.79 in 1.2 mi South 3.5 mph - N/A   Scattered Clouds
1:46 AM 30.2 °F 26.7 °F 30.2 °F 100% 29.79 in 2.0 mi South 3.5 mph - N/A   Partly Cloudy
1:53 AM 30.9 °F 27.5 °F 30.0 °F 96% 29.92 in 4.0 mi South 3.5 mph - N/A   Partly Cloudy
2:53 AM 30.9 °F 26.2 °F 28.9 °F 92% 29.93 in 6.0 mi SW 4.6 mph - N/A   Partly Cloudy
3:32 AM 26.6 °F - 24.8 °F 93% 29.82 in 3.0 mi Calm Calm - N/A   Partly Cloudy
3:35 AM 26.6 °F 21.2 °F 24.8 °F 93% 29.82 in 1.5 mi North 4.6 mph - N/A   Partly Cloudy
3:37 AM 26.6 °F 21.2 °F 24.8 °F 93% 29.82 in 0.8 mi North 4.6 mph - N/A   Mist
3:53 AM 28.0 °F - 28.0 °F 100% 29.95 in 0.2 mi Calm Calm - N/A   Mist
4:53 AM 28.9 °F 25.2 °F 28.0 °F 96% 30.00 in 0.2 mi WNW 3.5 mph - N/A   Mist
5:08 AM 28.4 °F - 28.4 °F 100% 29.87 in 0.2 mi Calm Calm - N/A   Mist
5:33 AM 28.4 °F - 28.4 °F 100% 29.89 in 0.2 mi Calm Calm - N/A   Mist
5:51 AM 28.4 °F - 26.6 °F 93% 29.89 in 1.0 mi Calm Calm - N/A   Mostly Cloudy
5:53 AM 28.0 °F - 27.0 °F 96% 30.03 in 1.5 mi Calm Calm - N/A   Mostly Cloudy
5:55 AM 28.4 °F - 26.6 °F 93% 29.90 in 3.0 mi Calm Calm - N/A   Mostly Cloudy
6:03 AM 26.6 °F 22.6 °F 24.8 °F 93% 29.90 in 9.0 mi SSE 3.5 mph - N/A   Scattered Clouds
6:53 AM 28.0 °F 22.8 °F 23.0 °F 81% 30.05 in 10.0 mi WSW 4.6 mph - N/A   Clear
7:53 AM 28.0 °F - 25.0 °F 88% 30.09 in 10.0 mi Calm Calm - N/A   Clear
8:53 AM 33.1 °F - 27.0 °F 78% 30.10 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:53 AM 41.0 °F - 21.9 °F 47% 30.08 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 43.0 °F - 17.1 °F 35% 30.07 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:53 AM 44.1 °F 40.1 °F 14.0 °F 30% 30.08 in 10.0 mi West 6.9 mph - N/A   Clear
12:53 PM 46.0 °F 40.2 °F 17.1 °F 31% 30.06 in 10.0 mi NW 12.7 mph 18.4 mph N/A   Scattered Clouds
1:53 PM 46.0 °F 41.0 °F 17.1 °F 31% 30.04 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
2:53 PM 46.9 °F - 16.0 °F 29% 30.03 in 10.0 mi WNW 10.4 mph 16.1 mph N/A   Partly Cloudy
3:14 PM 46.4 °F 40.4 °F 17.6 °F 32% 29.94 in 10.0 mi NW 13.8 mph - N/A   Scattered Clouds
3:53 PM 46.9 °F - 16.0 °F 29% 30.04 in 10.0 mi NW 15.0 mph - N/A   Clear
4:53 PM 46.0 °F 40.6 °F 16.0 °F 30% 30.04 in 10.0 mi NW 11.5 mph - N/A   Clear
5:53 PM 43.0 °F 40.3 °F 18.0 °F 37% 30.06 in 10.0 mi NNE 4.6 mph - N/A   Partly Cloudy
6:53 PM 37.9 °F - 18.0 °F 45% 30.10 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 36.0 °F 31.1 °F 19.0 °F 50% 30.12 in 10.0 mi WSW 5.8 mph - N/A   Clear
8:53 PM 35.1 °F 31.0 °F 18.0 °F 50% 30.12 in 10.0 mi SW 4.6 mph - N/A   Clear
9:53 PM 33.1 °F 27.7 °F 18.0 °F 54% 30.11 in 10.0 mi WSW 5.8 mph - N/A   Clear
10:53 PM 30.0 °F 22.4 °F 19.0 °F 64% 30.11 in 10.0 mi West 8.1 mph - N/A   Clear
11:53 PM 30.0 °F 26.5 °F 18.0 °F 61% 30.10 in 10.0 mi SW 3.5 mph - N/A   Clear