Weather History for Helena, MT

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Wednesday, May 8, 2013

  Actual Average Record
Temperature  
Mean Temperature 61 °F 52 °F  
Max Temperature 77 °F 65 °F 85 °F (1987)
Min Temperature 45 °F 38 °F 23 °F (1997)
Degree Days  
Heating Degree Days 4 13  
Month to date heating degree days 113 116  
Since 1 July heating degree days 6804 7170  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 32 °F    
Average Humidity 38    
Maximum Humidity 60    
Minimum Humidity 15    
Precipitation  
Precipitation 0.00 in 0.05 in 1.01 in (1948)
Month to date precipitation 0.13 0.34  
Year to date precipitation 1.67 2.57  
Snow  
Snow 0.00 in 0.00 in 3.20 in (1922)
Month to date snowfall 0.0 0.4  
Since 1 July snowfall 39.7 37.6  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.08 in    
Wind  
Wind Speed 5 mph (WNW)    
Max Wind Speed 13 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

May. 08, 2013 Rise Set
Actual Time 6:02 AM MDT 8:47 PM MDT
Civil Twilight 5:27 AM MDT 9:21 PM MDT
Nautical Twilight 4:44 AM MDT 10:06 PM MDT
Astronomical Twilight 3:52 AM MDT 10:57 PM MDT
Moon 5:17 AM MDT (5/8) 7:46 PM MDT (5/8)
Length of Visible Light 15h 53m
Length of Day
14h 44m
Waning Crescent, 2% of the Moon is Illuminated
May 8
Waning Crescent
May 9
New
May 17
First Quarter
May 24
Full
May 31
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 53.1 °F - 33.1 °F 47% 30.07 in 10.0 mi West 8.1 mph - N/A   Clear
1:53 AM 50.0 °F - 33.1 °F 52% 30.09 in 10.0 mi West 6.9 mph - N/A   Clear
2:53 AM 50.0 °F - 32.0 °F 50% 30.09 in 10.0 mi West 8.1 mph - N/A   Clear
3:53 AM 48.9 °F - 32.0 °F 52% 30.11 in 10.0 mi West 6.9 mph - N/A   Clear
4:53 AM 46.9 °F - 32.0 °F 56% 30.12 in 10.0 mi WSW 6.9 mph - N/A   Clear
5:53 AM 46.0 °F 41.9 °F 32.0 °F 58% 30.13 in 10.0 mi WSW 8.1 mph - N/A   Clear
6:53 AM 46.0 °F 41.9 °F 33.1 °F 61% 30.15 in 10.0 mi West 8.1 mph - N/A   Clear
7:53 AM 50.0 °F - 32.0 °F 50% 30.16 in 10.0 mi West 9.2 mph - N/A   Clear
8:53 AM 53.1 °F - 32.0 °F 45% 30.16 in 10.0 mi West 4.6 mph - N/A   Clear
9:53 AM 57.0 °F - 33.1 °F 40% 30.15 in 10.0 mi Variable 3.5 mph - N/A   Clear
10:53 AM 61.0 °F - 33.1 °F 35% 30.13 in 10.0 mi NNW 5.8 mph - N/A   Clear
11:53 AM 64.0 °F - 34.0 °F 33% 30.12 in 10.0 mi NE 3.5 mph - N/A   Clear
12:53 PM 66.9 °F - 34.0 °F 30% 30.09 in 10.0 mi NE 4.6 mph - N/A   Clear
1:53 PM 70.0 °F - 35.1 °F 28% 30.07 in 10.0 mi Variable 5.8 mph - N/A   Clear
2:53 PM 73.9 °F - 33.1 °F 22% 30.05 in 10.0 mi North 5.8 mph - N/A   Clear
3:53 PM 75.9 °F - 30.0 °F 19% 30.03 in 10.0 mi Variable 3.5 mph - N/A   Clear
4:53 PM 75.9 °F - 27.0 °F 16% 30.01 in 10.0 mi NNW 6.9 mph - N/A   Clear
5:53 PM 75.9 °F - 25.0 °F 15% 30.01 in 10.0 mi Calm Calm - N/A   Clear
6:53 PM 73.9 °F - 25.0 °F 16% 30.01 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 70.0 °F - 34.0 °F 27% 30.02 in 10.0 mi East 8.1 mph - N/A   Clear
8:53 PM 66.0 °F - 34.0 °F 30% 30.03 in 10.0 mi South 6.9 mph - N/A   Clear
9:53 PM 60.1 °F - 35.1 °F 39% 30.05 in 10.0 mi West 6.9 mph - N/A   Clear
10:53 PM 59.0 °F - 35.1 °F 41% 30.06 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 55.9 °F - 35.1 °F 45% 30.07 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy