Weather History for Helena, MT

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Wednesday, September 26, 2012

  Actual Average Record
Temperature  
Mean Temperature 61 °F 54 °F  
Max Temperature 72 °F 68 °F 88 °F (1952)
Min Temperature 49 °F 39 °F 20 °F (1900)
Degree Days  
Heating Degree Days 4 12  
Month to date heating degree days 91 189  
Since 1 July heating degree days 112 258  
Cooling Degree Days 0 0  
Month to date cooling degree days 5 22  
Year to date cooling degree days 529 405  
Growing Degree Days 11 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 53    
Maximum Humidity 71    
Minimum Humidity 34    
Precipitation  
Precipitation 0.00 in 0.03 in 0.62 in (1947)
Month to date precipitation 0.00 0.98  
Year to date precipitation 6.47 9.53  
Snow  
Snow 0.00 in 0.10 in 3.30 in (1984)
Month to date snowfall 0.0 1.1  
Since 1 July snowfall 0.0 1.4  
Since 1 September snowfall 0.0 1.1  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.09 in    
Wind  
Wind Speed 7 mph (WNW)    
Max Wind Speed 14 mph    
Max Gust Speed 17 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 26, 2012 Rise Set
Actual Time 7:20 AM MDT 7:16 PM MDT
Civil Twilight 6:50 AM MDT 7:46 PM MDT
Nautical Twilight 6:15 AM MDT 8:21 PM MDT
Astronomical Twilight 5:39 AM MDT 8:57 PM MDT
Moon 5:26 PM MDT (9/26) 3:40 AM MDT (9/26)
Length of Visible Light 12h 55m
Length of Day
11h 55m
Waxing Gibbous, 88% of the Moon is Illuminated
Sep 26
Waxing Gibbous
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New
Oct 21
First Quarter

Hourly Weather History & Observations

Time (MDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
4:53 AM 52.0 °F 41.0 °F 66% 30.06 in 10.0 mi WSW 6.9 mph - N/A   Clear
5:53 AM 53.1 °F 43.0 °F 69% 30.07 in 10.0 mi SW 6.9 mph - N/A   Clear
6:53 AM 51.1 °F 42.1 °F 71% 30.09 in 10.0 mi WSW 6.9 mph - N/A   Clear
7:53 AM 51.1 °F 42.1 °F 71% 30.10 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
8:53 AM 54.0 °F 43.0 °F 66% 30.12 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
9:53 AM 57.0 °F 44.1 °F 62% 30.13 in 10.0 mi NNW 4.6 mph - N/A   Clear
10:53 AM 59.0 °F 44.1 °F 58% 30.13 in 10.0 mi NNW 4.6 mph - N/A   Clear
11:53 AM 62.1 °F 44.1 °F 52% 30.11 in 10.0 mi Variable 4.6 mph - N/A   Clear
12:53 PM 64.0 °F 44.1 °F 48% 30.10 in 10.0 mi NE 5.8 mph - N/A   Clear
1:53 PM 66.9 °F 44.1 °F 44% 30.06 in 10.0 mi NW 6.9 mph - N/A   Clear
2:53 PM 69.1 °F 43.0 °F 39% 30.04 in 10.0 mi NNW 4.6 mph - N/A   Clear
3:53 PM 70.0 °F 41.0 °F 35% 30.03 in 10.0 mi NW 5.8 mph - N/A   Clear
4:53 PM 71.1 °F 41.0 °F 34% 30.02 in 10.0 mi North 5.8 mph - N/A   Clear
5:53 PM 69.1 °F 44.1 °F 40% 30.04 in 10.0 mi North 8.1 mph - N/A   Clear
6:53 PM 64.0 °F 44.1 °F 48% 30.06 in 10.0 mi NNW 6.9 mph - N/A   Clear
7:53 PM 61.0 °F 43.0 °F 52% 30.09 in 10.0 mi WNW 10.4 mph - N/A   Clear
8:53 PM 57.9 °F 43.0 °F 58% 30.12 in 10.0 mi West 6.9 mph - N/A   Clear
9:53 PM 57.0 °F 43.0 °F 59% 30.13 in 10.0 mi West 8.1 mph - N/A   Clear
10:53 PM 55.9 °F 43.0 °F 62% 30.13 in 10.0 mi WSW 9.2 mph - N/A   Clear
11:53 PM 54.0 °F 42.1 °F 64% 30.14 in 10.0 mi WSW 6.9 mph - N/A   Clear