Weather History for Helena, MT

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Sunday, August 11, 2013

  Actual Average Record
Temperature  
Mean Temperature 71 °F 70 °F  
Max Temperature 84 °F 86 °F 97 °F (1996)
Min Temperature 57 °F 54 °F 40 °F (1997)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 3 5  
Since 1 June heating degree days 149 168  
Since 1 July heating degree days 3 32  
Cooling Degree Days 6 6  
Month to date cooling degree days 49 70  
Year to date cooling degree days 357 308  
Since 1 June cooling degree days 350 300  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 45 °F    
Average Humidity 45    
Maximum Humidity 67    
Minimum Humidity 23    
Precipitation  
Precipitation 0.00 in 0.04 in 0.90 in (1999)
Month to date precipitation 1.03 0.41  
Year to date precipitation 7.44 7.76  
Snow  
Snow 0.00 in 0.00 in T in (1989)
Month to date snowfall 0.0 0.0  
Since 1 June snowfall 0.0 T  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.04 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 21 mph    
Max Gust Speed 25 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 11, 2013 Rise Set
Actual Time 6:21 AM MDT 8:43 PM MDT
Civil Twilight 5:47 AM MDT 9:17 PM MDT
Nautical Twilight 5:05 AM MDT 9:59 PM MDT
Astronomical Twilight 4:17 AM MDT 10:46 PM MDT
Moon 11:35 AM MDT (8/11) 10:38 PM MDT (8/11)
Length of Visible Light 15h 29m
Length of Day
14h 22m
Waxing Crescent, 22% of the Moon is Illuminated
Aug 11
Waxing Crescent
Aug 14
First Quarter
Aug 20
Full
Aug 28
Last Quarter
Sep 5
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 64.0 °F 45.0 °F 50% 30.06 in 10.0 mi NW 3.5 mph - N/A   Clear
1:53 AM 64.9 °F 44.1 °F 47% 30.03 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 61.0 °F 45.0 °F 56% 30.04 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 63.0 °F 45.0 °F 52% 30.03 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 57.0 °F 46.9 °F 69% 30.04 in 10.0 mi West 5.8 mph - N/A   Clear
5:53 AM 60.1 °F 46.9 °F 62% 30.04 in 10.0 mi Calm Calm - N/A   Clear
6:53 AM 59.0 °F 48.0 °F 67% 30.04 in 10.0 mi Calm Calm - N/A   Clear
7:53 AM 60.1 °F 46.0 °F 60% 30.06 in 10.0 mi Calm Calm - N/A   Clear
8:53 AM 60.1 °F 46.9 °F 62% 30.07 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 63.0 °F 48.0 °F 58% 30.07 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 66.0 °F 50.0 °F 56% 30.06 in 10.0 mi North 3.5 mph - N/A   Clear
11:53 AM 71.1 °F 46.9 °F 42% 30.05 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 75.0 °F 46.9 °F 37% 30.03 in 10.0 mi Calm Calm - N/A   Clear
1:53 PM 79.0 °F 46.0 °F 31% 30.01 in 10.0 mi Calm Calm - N/A   Clear
2:53 PM 79.0 °F 46.9 °F 32% 30.02 in 10.0 mi Variable 5.8 mph - N/A   Clear
3:53 PM 81.0 °F 44.1 °F 27% 30.01 in 10.0 mi Calm Calm - N/A   Clear
4:53 PM 82.9 °F 43.0 °F 24% 29.99 in 10.0 mi ESE 4.6 mph - N/A   Clear
5:53 PM 82.9 °F 45.0 °F 26% 29.98 in 10.0 mi SE 9.2 mph - N/A   Clear
6:53 PM 80.1 °F 39.9 °F 24% 30.02 in 10.0 mi SSW 10.4 mph - N/A   Clear
7:53 PM 78.1 °F 37.0 °F 23% 30.01 in 10.0 mi SW 10.4 mph 25.3 mph N/A   Clear
8:53 PM 73.9 °F 39.9 °F 29% 30.04 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
9:53 PM 72.0 °F 41.0 °F 33% 30.06 in 10.0 mi WNW 5.8 mph - N/A   Clear
10:53 PM 69.1 °F 42.1 °F 38% 30.06 in 10.0 mi WSW 4.6 mph - N/A   Clear
11:53 PM 69.1 °F 42.1 °F 38% 30.05 in 10.0 mi SW 6.9 mph - N/A   Partly Cloudy