Weather History for Helena, MT

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Thursday, May 16, 2013

  Actual Average Record
Temperature  
Mean Temperature 56 °F 54 °F  
Max Temperature 67 °F 67 °F 91 °F (1988)
Min Temperature 45 °F 41 °F 28 °F (1986)
Degree Days  
Heating Degree Days 9 11  
Month to date heating degree days 152 213  
Since 1 July heating degree days 6843 7267  
Cooling Degree Days 0 0  
Month to date cooling degree days 7 0  
Year to date cooling degree days 7 0  
Growing Degree Days 6 (Base 50)    
Moisture  
Dew Point 39 °F    
Average Humidity 59    
Maximum Humidity 86    
Minimum Humidity 32    
Precipitation  
Precipitation 0.04 in 0.06 in 0.63 in (1996)
Month to date precipitation 0.17 0.79  
Year to date precipitation 1.71 3.02  
Snow  
Snow 0.00 in 0.10 in 0.80 in (1942)
Month to date snowfall 0.0 0.7  
Since 1 July snowfall 39.7 37.9  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.87 in    
Wind  
Wind Speed 5 mph (West)    
Max Wind Speed 18 mph    
Max Gust Speed 25 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 16, 2013 Rise Set
Actual Time 5:52 AM MDT 8:57 PM MDT
Civil Twilight 5:16 AM MDT 9:33 PM MDT
Nautical Twilight 4:30 AM MDT 10:19 PM MDT
Astronomical Twilight 3:34 AM MDT 11:16 PM MDT
Moon 11:36 AM MDT (5/16) 1:13 AM MDT (5/16)
Length of Visible Light 16h 16m
Length of Day
15h 04m
Waxing Crescent, 36% of the Moon is Illuminated
May 16
Waxing Crescent
May 17
First Quarter
May 24
Full
May 31
Last Quarter
Jun 8
New

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 55.0 °F - 37.9 °F 53% 29.92 in 10.0 mi Variable 3.5 mph - 0.00 in   Overcast
1:53 AM 52.0 °F - 44.1 °F 74% 29.89 in 9.0 mi Calm Calm - 0.03 in Rain Light Rain
2:53 AM 50.0 °F - 45.0 °F 83% 29.88 in 10.0 mi West 4.6 mph - 0.01 in   Overcast
3:53 AM 48.9 °F - 44.1 °F 83% 29.88 in 10.0 mi WSW 5.8 mph - 0.00 in Rain Light Rain
4:53 AM 48.9 °F - 44.1 °F 83% 29.87 in 10.0 mi Calm Calm - 0.00 in   Scattered Clouds
5:53 AM 46.0 °F 41.9 °F 42.1 °F 86% 29.88 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
6:53 AM 46.0 °F - 41.0 °F 83% 29.88 in 10.0 mi Calm Calm - N/A   Clear
7:53 AM 48.9 °F - 42.1 °F 77% 29.89 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:53 AM 53.1 °F - 43.0 °F 69% 29.88 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:53 AM 57.0 °F - 43.0 °F 59% 29.87 in 10.0 mi WNW 3.5 mph - N/A   Scattered Clouds
10:53 AM 60.1 °F - 39.0 °F 46% 29.87 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
11:53 AM 62.1 °F - 39.0 °F 43% 29.86 in 10.0 mi Variable 4.6 mph - N/A   Clear
12:53 PM 62.1 °F - 37.0 °F 39% 29.84 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
1:53 PM 63.0 °F - 37.0 °F 38% 29.83 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:53 PM 66.9 °F - 37.0 °F 33% 29.81 in 10.0 mi NW 8.1 mph 19.6 mph N/A   Mostly Cloudy
3:53 PM 66.2 °F - 35.6 °F 32% 29.82 in 10.0 mi WNW 13.8 mph 20.7 mph N/A   Mostly Cloudy
4:53 PM 63.0 °F - 36.0 °F 37% 29.83 in 10.0 mi WNW 15.0 mph - N/A   Overcast
5:53 PM 61.0 °F - 35.1 °F 38% 29.86 in 10.0 mi West 15.0 mph - N/A   Overcast
6:53 PM 60.1 °F - 35.1 °F 39% 29.86 in 10.0 mi North 4.6 mph 16.1 mph N/A   Overcast
7:53 PM 60.1 °F - 34.0 °F 38% 29.86 in 10.0 mi West 8.1 mph - N/A   Scattered Clouds
8:53 PM 57.9 °F - 35.1 °F 42% 29.86 in 10.0 mi WSW 4.6 mph - N/A   Clear
9:53 PM 55.9 °F - 36.0 °F 47% 29.87 in 10.0 mi SW 3.5 mph - N/A   Clear
10:53 PM 50.0 °F - 39.0 °F 66% 29.89 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 48.0 °F - 35.1 °F 61% 29.90 in 10.0 mi WSW 5.8 mph - N/A   Clear