Weather History for Helena, MT

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Tuesday, September 10, 2013

  Actual Average Record
Temperature  
Mean Temperature 65 °F 60 °F  
Max Temperature 83 °F 75 °F 91 °F (1966)
Min Temperature 47 °F 45 °F 30 °F (1921)
Degree Days  
Heating Degree Days 0 6  
Month to date heating degree days 0 47  
Since 1 July heating degree days 3 116  
Cooling Degree Days 0 1  
Month to date cooling degree days 53 15  
Year to date cooling degree days 562 398  
Growing Degree Days 14 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 54    
Maximum Humidity 86    
Minimum Humidity 22    
Precipitation  
Precipitation 0.00 in 0.04 in 0.84 in (1988)
Month to date precipitation 0.16 0.41  
Year to date precipitation 8.28 8.96  
Snow  
Snow 0.00 in 0.00 in 0.70 in (1949)
Month to date snowfall 0.0 0.3  
Since 1 July snowfall 0.0 0.6  
Since 1 September snowfall 0.0 0.3  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.09 in    
Wind  
Wind Speed 2 mph (East)    
Max Wind Speed 9 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 10, 2013 Rise Set
Actual Time 6:59 AM MDT 7:48 PM MDT
Civil Twilight 6:29 AM MDT 8:19 PM MDT
Nautical Twilight 5:52 AM MDT 8:55 PM MDT
Astronomical Twilight 5:14 AM MDT 9:33 PM MDT
Moon 12:51 PM MDT (9/10) 10:32 PM MDT (9/10)
Length of Visible Light 13h 50m
Length of Day
12h 49m
Waxing Crescent, 29% of the Moon is Illuminated
Sep 10
Waxing Crescent
Sep 12
First Quarter
Sep 19
Full
Sep 26
Last Quarter
Oct 4
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 57.0 °F 45.0 °F 64% 30.06 in 10.0 mi West 3.5 mph - N/A   Clear
1:53 AM 55.0 °F 44.1 °F 67% 30.07 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 53.1 °F 45.0 °F 74% 30.08 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 53.1 °F 46.0 °F 77% 30.08 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 52.0 °F 45.0 °F 77% 30.10 in 10.0 mi Calm Calm - N/A   Clear
5:53 AM 50.0 °F 44.1 °F 80% 30.10 in 10.0 mi Calm Calm - N/A   Clear
6:53 AM 46.9 °F 43.0 °F 86% 30.13 in 10.0 mi Calm Calm - N/A   Clear
7:18 AM 48.2 °F 44.6 °F 87% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:53 AM 53.1 °F 46.9 °F 80% 30.13 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:53 AM 55.0 °F 46.9 °F 74% 30.15 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 59.0 °F 46.9 °F 64% 30.16 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 62.1 °F 48.0 °F 60% 30.15 in 10.0 mi Calm Calm - N/A   Clear
11:53 AM 68.0 °F 48.0 °F 49% 30.13 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 73.0 °F 46.9 °F 39% 30.10 in 10.0 mi ENE 4.6 mph - N/A   Clear
1:53 PM 78.1 °F 44.1 °F 30% 30.07 in 10.0 mi ENE 3.5 mph - N/A   Clear
2:53 PM 80.1 °F 42.1 °F 26% 30.05 in 10.0 mi ENE 8.1 mph - N/A   Clear
3:53 PM 80.1 °F 42.1 °F 26% 30.04 in 10.0 mi ENE 3.5 mph - N/A   Clear
4:53 PM 81.0 °F 41.0 °F 24% 30.03 in 10.0 mi Calm Calm - N/A   Clear
5:53 PM 82.0 °F 39.0 °F 22% 30.03 in 10.0 mi ENE 5.8 mph - N/A   Clear
6:53 PM 81.0 °F 39.0 °F 22% 30.04 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 75.0 °F 41.0 °F 29% 30.04 in 10.0 mi South 3.5 mph - N/A   Clear
8:53 PM 71.1 °F 39.9 °F 32% 30.07 in 10.0 mi WSW 4.6 mph - N/A   Clear
9:53 PM 64.0 °F 42.1 °F 45% 30.09 in 10.0 mi Calm Calm - N/A   Clear
10:53 PM 64.0 °F 39.0 °F 40% 30.11 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 60.1 °F 39.9 °F 47% 30.12 in 10.0 mi Calm Calm - N/A   Clear