Weather History for Helena, MT

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Saturday, September 8, 2012

  Actual Average Record
Temperature  
Mean Temperature 65 °F 61 °F  
Max Temperature 86 °F 76 °F 93 °F (1994)
Min Temperature 43 °F 46 °F 29 °F (1960)
Degree Days  
Heating Degree Days 0 5  
Month to date heating degree days 28 35  
Since 1 July heating degree days 49 104  
Cooling Degree Days 0 1  
Month to date cooling degree days 2 13  
Year to date cooling degree days 526 396  
Growing Degree Days 14 (Base 50)    
Moisture  
Dew Point 29 °F    
Average Humidity 34    
Maximum Humidity 58    
Minimum Humidity 10    
Precipitation  
Precipitation 0.00 in 0.04 in 0.66 in (1896)
Month to date precipitation 0.00 0.33  
Year to date precipitation 6.47 8.88  
Snow  
Snow 0.00 in 0.00 in 3.40 in (1896)
Month to date snowfall 0.0 0.2  
Since 1 July snowfall 0.0 0.5  
Since 1 September snowfall 0.0 0.2  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.20 in    
Wind  
Wind Speed 4 mph (ENE)    
Max Wind Speed 20 mph    
Max Gust Speed 26 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 08, 2012 Rise Set
Actual Time 6:57 AM MDT 7:52 PM MDT
Civil Twilight 6:26 AM MDT 8:22 PM MDT
Nautical Twilight 5:50 AM MDT 8:59 PM MDT
Astronomical Twilight 5:11 AM MDT 9:38 PM MDT
Moon No Moon Rise 3:08 PM MDT (9/8)
Length of Visible Light 13h 56m
Length of Day
12h 54m
Waning Gibbous, 48% of the Moon is Illuminated
Sep 8
Waning Gibbous
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

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 28.9 °F 40% 30.31 in 10.0 mi Calm Calm - N/A   Clear
1:53 AM 50.0 °F 28.9 °F 44% 30.32 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 51.1 °F 28.9 °F 43% 30.30 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 46.9 °F 30.0 °F 52% 30.31 in 10.0 mi NE 3.5 mph - N/A   Clear
4:53 AM 48.0 °F 30.0 °F 50% 30.31 in 10.0 mi Calm Calm - N/A   Clear
5:53 AM 46.0 °F 30.0 °F 54% 30.31 in 10.0 mi Calm Calm - N/A   Clear
6:53 AM 45.0 °F 30.0 °F 56% 30.33 in 10.0 mi Calm Calm - N/A   Clear
7:53 AM 45.0 °F 30.0 °F 56% 30.35 in 10.0 mi Calm Calm - N/A   Clear
8:53 AM 48.9 °F 30.9 °F 50% 30.35 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 54.0 °F 30.9 °F 41% 30.34 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 59.0 °F 30.9 °F 35% 30.31 in 10.0 mi Calm Calm - N/A   Clear
11:53 AM 64.0 °F 32.0 °F 30% 30.28 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 70.0 °F 35.1 °F 28% 30.23 in 10.0 mi Variable 3.5 mph - N/A   Clear
1:53 PM 75.2 °F 37.4 °F 25% 30.20 in 10.0 mi North 4.6 mph - N/A   Clear
2:53 PM 81.0 °F 36.0 °F 20% 30.14 in 10.0 mi Calm Calm - N/A   Clear
3:53 PM 84.0 °F 26.1 °F 12% 30.09 in 10.0 mi ENE 5.8 mph - N/A   Clear
4:53 PM 84.9 °F 24.1 °F 11% 30.07 in 10.0 mi East 18.4 mph 26.5 mph N/A   Clear
5:53 PM 84.0 °F 23.0 °F 11% 30.05 in 10.0 mi East 13.8 mph - N/A   Clear
6:53 PM 81.0 °F 21.9 °F 11% 30.05 in 10.0 mi East 13.8 mph - N/A   Clear
7:53 PM 77.0 °F 23.0 °F 13% 30.06 in 10.0 mi Calm Calm - N/A   Clear
8:53 PM 68.0 °F 27.0 °F 21% 30.08 in 10.0 mi WSW 8.1 mph - N/A   Clear
9:53 PM 71.1 °F 25.0 °F 18% 30.07 in 10.0 mi WSW 9.2 mph - N/A   Clear
10:53 PM 64.0 °F 27.0 °F 25% 30.08 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 62.1 °F 27.0 °F 26% 30.07 in 10.0 mi Calm Calm - N/A   Clear