Weather History for Helena, MT

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Thursday, September 1, 2011

  Actual Average Record
Temperature  
Mean Temperature 60 °F 64 °F  
Max Temperature 68 °F 79 °F 96 °F (1967)
Min Temperature 51 °F 48 °F 33 °F (1930)
Degree Days  
Heating Degree Days 5 4  
Month to date heating degree days 5 4  
Since 1 July heating degree days 13 73  
Cooling Degree Days 0 2  
Month to date cooling degree days 0 2  
Year to date cooling degree days 332 385  
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 38 °F    
Average Humidity 50    
Maximum Humidity 77    
Minimum Humidity 22    
Precipitation  
Precipitation T in 0.04 in 0.46 in (2008)
Month to date precipitation T 0.04  
Year to date precipitation 11.85 8.59  
Snow  
Snow 0.00 in 0.00 in 0.00 in (1999)
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.3  
Since 1 September snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.04 in    
Wind  
Wind Speed 7 mph (West)    
Max Wind Speed 30 mph    
Max Gust Speed 39 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 01, 2011 Rise Set
Actual Time 6:47 AM MDT 8:07 PM MDT
Civil Twilight 6:16 AM MDT 8:38 PM MDT
Nautical Twilight 5:38 AM MDT 9:16 PM MDT
Astronomical Twilight 4:57 AM MDT 9:56 PM MDT
Moon 11:34 AM MDT (9/1) 9:37 PM MDT (9/1)
Length of Visible Light 14h 22m
Length of Day
13h 19m
Waxing Crescent, 18% of the Moon is Illuminated
Sep 1
Waxing Crescent
Sep 4
First Quarter
Sep 12
Full
Sep 20
Last Quarter
Sep 27
New

Hourly Weather History & Observations

Time (MDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 53.1 °F 46.0 °F 77% 29.96 in 10.0 mi West 8.1 mph - N/A   Overcast
1:53 AM 53.1 °F 45.0 °F 74% 29.97 in 10.0 mi West 6.9 mph - N/A   Overcast
2:53 AM 52.0 °F 44.1 °F 74% 29.99 in 10.0 mi West 8.1 mph - N/A   Overcast
3:53 AM 52.0 °F 43.0 °F 71% 30.01 in 10.0 mi West 6.9 mph - N/A   Overcast
4:53 AM 52.0 °F 43.0 °F 71% 30.01 in 10.0 mi West 5.8 mph - N/A   Overcast
5:53 AM 52.0 °F 43.0 °F 71% 30.03 in 10.0 mi WNW 4.6 mph - N/A   Overcast
6:53 AM 52.0 °F 44.1 °F 74% 30.04 in 10.0 mi NNW 5.8 mph - N/A   Overcast
7:53 AM 52.0 °F 44.1 °F 74% 30.07 in 10.0 mi WNW 4.6 mph - N/A   Overcast
8:53 AM 53.1 °F 44.1 °F 71% 30.09 in 10.0 mi North 4.6 mph - N/A   Overcast
9:53 AM 55.0 °F 44.1 °F 67% 30.08 in 10.0 mi Calm Calm - N/A   Overcast
10:53 AM 55.9 °F 44.1 °F 64% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:53 AM 60.1 °F 41.0 °F 49% 30.07 in 10.0 mi ENE 5.8 mph - N/A   Scattered Clouds
12:53 PM 62.6 °F 39.2 °F 42% 30.05 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:53 PM 61.0 °F 37.9 °F 42% 30.06 in 10.0 mi WSW 15.0 mph 21.9 mph 0.00 in Rain Light Rain
2:12 PM 62.6 °F 35.6 °F 37% 30.06 in 10.0 mi West 15.0 mph 28.8 mph 0.00 in   Overcast
2:53 PM 64.9 °F 34.0 °F 32% 30.06 in 10.0 mi WSW 12.7 mph - 0.00 in   Clear
3:27 PM 59.0 °F 35.6 °F 42% 30.08 in 10.0 mi WSW 19.6 mph 31.1 mph N/A   Partly Cloudy
3:53 PM 63.0 °F 35.1 °F 35% 30.07 in 10.0 mi WSW 16.1 mph 25.3 mph N/A   Clear
4:53 PM 66.0 °F 35.1 °F 32% 30.05 in 10.0 mi WSW 10.4 mph 20.7 mph N/A   Clear
5:53 PM 68.0 °F 28.9 °F 23% 30.03 in 10.0 mi West 15.0 mph 27.6 mph N/A   Partly Cloudy
6:53 PM 66.2 °F 28.4 °F 24% 30.03 in 10.0 mi WNW 8.1 mph - N/A   Clear
7:53 PM 62.1 °F 28.9 °F 29% 30.04 in 10.0 mi West 4.6 mph - N/A   Clear
8:53 PM 59.0 °F 28.9 °F 32% 30.05 in 10.0 mi SW 5.8 mph - N/A   Clear
9:53 PM 57.9 °F 28.9 °F 33% 30.05 in 10.0 mi WSW 8.1 mph - N/A   Clear
10:53 PM 53.1 °F 28.9 °F 40% 30.05 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 59.0 °F 28.4 °F 31% 30.03 in 10.0 mi SW 6.9 mph - N/A   Clear