Weather History for Helena, MT

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Monday, September 30, 2013

  Actual Average Record
Temperature  
Mean Temperature 50 °F 52 °F  
Max Temperature 58 °F 66 °F 89 °F (1963)
Min Temperature 42 °F 38 °F 21 °F (1950)
Degree Days  
Heating Degree Days 15 13  
Month to date heating degree days 174 239  
Since 1 July heating degree days 177 306  
Cooling Degree Days 0 0  
Month to date cooling degree days 80 23  
Year to date cooling degree days 589 406  
Moisture  
Dew Point 31 °F    
Average Humidity 48    
Maximum Humidity 71    
Minimum Humidity 24    
Precipitation  
Precipitation 0.10 in 0.03 in 1.63 in (1893)
Month to date precipitation 1.46 1.10  
Year to date precipitation 9.58 9.65  
Snow  
Snow 0.00 in 0.10 in 2.00 in (1893)
Month to date snowfall 0.0 1.3  
Since 1 July snowfall 0.0 1.6  
Since 1 September snowfall 0.0 1.3  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.73 in    
Wind  
Wind Speed 12 mph (West)    
Max Wind Speed 31 mph    
Max Gust Speed 45 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Sep. 30, 2013 Rise Set
Actual Time 7:25 AM MDT 7:09 PM MDT
Civil Twilight 6:55 AM MDT 7:39 PM MDT
Nautical Twilight 6:20 AM MDT 8:14 PM MDT
Astronomical Twilight 5:44 AM MDT 8:49 PM MDT
Moon 2:52 AM MDT (9/30) 4:53 PM MDT (9/30)
Length of Visible Light 12h 43m
Length of Day
11h 43m
Waning Crescent, 18% of the Moon is Illuminated
Sep 30
Waning Crescent
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Hourly Weather History & Observations

Time (MDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 51.1 °F - 35.1 °F 54% 29.67 in 10.0 mi ESE 10.4 mph - N/A   Clear
1:53 AM 52.0 °F - 36.0 °F 54% 29.64 in 10.0 mi ESE 6.9 mph - N/A   Clear
2:53 AM 54.0 °F - 36.0 °F 51% 29.62 in 10.0 mi SSW 9.2 mph - N/A   Partly Cloudy
3:53 AM 48.9 °F - 37.0 °F 64% 29.61 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 53.1 °F - 37.9 °F 57% 29.58 in 10.0 mi South 12.7 mph 20.7 mph N/A   Partly Cloudy
5:53 AM 53.1 °F - 37.9 °F 57% 29.55 in 10.0 mi SSW 9.2 mph - N/A   Clear
6:53 AM 46.0 °F 43.9 °F 37.9 °F 73% 29.54 in 10.0 mi WSW 4.6 mph - N/A   Scattered Clouds
7:53 AM 46.9 °F - 41.0 °F 80% 29.57 in 4.0 mi West 11.5 mph 17.3 mph 0.02 in Rain Light Rain
8:10 AM 46.4 °F 39.2 °F 42.8 °F 87% 29.61 in 2.5 mi West 18.4 mph 39.1 mph 0.07 in Rain Light Rain
8:17 AM 46.4 °F 39.5 °F 39.2 °F 76% 29.60 in 8.0 mi West 17.3 mph 29.9 mph 0.08 in Rain Light Rain
8:53 AM 46.9 °F - 37.0 °F 68% 29.67 in 10.0 mi West 12.7 mph 26.5 mph 0.08 in   Overcast
9:53 AM 48.0 °F - 35.1 °F 61% 29.70 in 10.0 mi West 11.5 mph 18.4 mph N/A   Mostly Cloudy
10:53 AM 51.1 °F - 28.0 °F 41% 29.68 in 10.0 mi WSW 16.1 mph 26.5 mph N/A   Partly Cloudy
11:53 AM 51.1 °F - 25.0 °F 36% 29.69 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
12:53 PM 55.9 °F - 24.1 °F 29% 29.71 in 10.0 mi West 23.0 mph 35.7 mph N/A   Clear
1:53 PM 55.9 °F - 25.0 °F 30% 29.73 in 10.0 mi West 20.7 mph 28.8 mph N/A   Clear
2:53 PM 55.0 °F - 24.1 °F 30% 29.73 in 10.0 mi West 24.2 mph 36.8 mph N/A   Partly Cloudy
3:53 PM 57.9 °F - 21.9 °F 25% 29.75 in 10.0 mi West 27.6 mph 39.1 mph N/A   Clear
4:53 PM 57.9 °F - 23.0 °F 26% 29.76 in 10.0 mi West 23.0 mph 33.4 mph N/A   Clear
5:53 PM 54.0 °F - 25.0 °F 33% 29.80 in 10.0 mi West 17.3 mph 29.9 mph N/A   Partly Cloudy
6:53 PM 51.1 °F - 27.0 °F 39% 29.86 in 10.0 mi West 11.5 mph - N/A   Clear
7:53 PM 50.0 °F - 28.0 °F 43% 29.90 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
8:53 PM 48.9 °F - 28.9 °F 46% 29.93 in 10.0 mi West 11.5 mph 21.9 mph N/A   Clear
9:53 PM 46.0 °F 41.9 °F 30.9 °F 56% 29.95 in 10.0 mi WNW 8.1 mph - N/A   Clear
10:53 PM 44.1 °F - 28.9 °F 55% 29.97 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 44.1 °F - 28.9 °F 55% 29.96 in 10.0 mi Calm Calm - N/A   Scattered Clouds