Weather History for Helena, MT

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Monday, April 15, 2013

  Actual Average Record
Temperature  
Mean Temperature 27 °F 45 °F  
Max Temperature 34 °F 58 °F 78 °F (1988)
Min Temperature 20 °F 32 °F 9 °F (1896)
Degree Days  
Heating Degree Days 38 20  
Month to date heating degree days 360 332  
Since 1 July heating degree days 6340 6784  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 14 °F    
Average Humidity 58    
Maximum Humidity 77    
Minimum Humidity 39    
Precipitation  
Precipitation 0.00 in 0.03 in 0.35 in (1925)
Month to date precipitation 0.54 0.44  
Year to date precipitation 1.30 1.69  
Snow  
Snow 0.00 in 0.20 in 3.10 in (1884)
Month to date snowfall 1.1 2.1  
Since 1 July snowfall 37.2 35.6  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 11 mph (NNW)    
Max Wind Speed 22 mph    
Max Gust Speed 29 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Apr. 15, 2013 Rise Set
Actual Time 6:40 AM MDT 8:16 PM MDT
Civil Twilight 6:08 AM MDT 8:48 PM MDT
Nautical Twilight 5:30 AM MDT 9:26 PM MDT
Astronomical Twilight 4:48 AM MDT 10:08 PM MDT
Moon 9:58 AM MDT (4/15) 12:42 AM MDT (4/15)
Length of Visible Light 14h 39m
Length of Day
13h 36m
Waxing Crescent, 25% of the Moon is Illuminated
Apr 15
Waxing Crescent
Apr 18
First Quarter
Apr 25
Full
May 2
Last Quarter
May 9
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 21.9 °F 13.4 °F 14.0 °F 72% 30.11 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
1:53 AM 21.9 °F 15.7 °F 14.0 °F 72% 30.10 in 10.0 mi WNW 4.6 mph - N/A   Overcast
2:53 AM 21.9 °F 14.5 °F 15.1 °F 75% 30.09 in 10.0 mi WNW 5.8 mph - N/A   Overcast
3:11 AM 21.2 °F 12.6 °F 15.8 °F 80% 29.93 in 10.0 mi WNW 6.9 mph - N/A   Overcast
3:53 AM 21.9 °F 15.7 °F 15.1 °F 75% 30.09 in 10.0 mi WNW 4.6 mph - N/A   Overcast
4:53 AM 21.0 °F 10.6 °F 15.1 °F 78% 30.10 in 10.0 mi NW 9.2 mph - N/A   Overcast
5:53 AM 21.0 °F 12.4 °F 14.0 °F 74% 30.11 in 10.0 mi WNW 6.9 mph - N/A   Overcast
6:53 AM 19.9 °F 12.1 °F 14.0 °F 78% 30.13 in 10.0 mi West 5.8 mph - N/A   Overcast
7:53 AM 21.9 °F 12.5 °F 14.0 °F 72% 30.15 in 10.0 mi NW 8.1 mph - N/A   Scattered Clouds
8:53 AM 24.1 °F 14.4 °F 12.9 °F 62% 30.16 in 10.0 mi NNW 9.2 mph - N/A   Overcast
9:18 AM 24.8 °F 13.4 °F 12.2 °F 59% 29.99 in 10.0 mi North 12.7 mph - N/A   Overcast
9:53 AM 24.1 °F 13.1 °F 12.0 °F 60% 30.17 in 10.0 mi NW 11.5 mph 18.4 mph N/A   Overcast
10:53 AM 26.1 °F 15.0 °F 10.9 °F 53% 30.17 in 10.0 mi North 12.7 mph - N/A   Mostly Cloudy
11:00 AM 26.6 °F 18.2 °F 10.4 °F 51% 29.99 in 10.0 mi North 8.1 mph - N/A   Overcast
11:53 AM 28.9 °F 18.6 °F 10.9 °F 47% 30.16 in 10.0 mi NNW 12.7 mph - N/A   Overcast
12:53 PM 30.0 °F 21.7 °F 12.0 °F 47% 30.16 in 10.0 mi NNE 9.2 mph 24.2 mph N/A   Overcast
1:53 PM 30.0 °F 19.5 °F 12.0 °F 47% 30.16 in 10.0 mi North 13.8 mph 20.7 mph N/A   Mostly Cloudy
2:53 PM 32.0 °F 20.8 °F 10.9 °F 42% 30.16 in 10.0 mi North 17.3 mph 24.2 mph N/A   Mostly Cloudy
3:53 PM 33.1 °F 21.9 °F 12.0 °F 42% 30.15 in 10.0 mi North 18.4 mph 25.3 mph N/A   Mostly Cloudy
4:53 PM 30.9 °F 18.7 °F 14.0 °F 50% 30.17 in 10.0 mi North 19.6 mph 27.6 mph N/A   Overcast
5:53 PM 30.9 °F 19.1 °F 14.0 °F 50% 30.18 in 10.0 mi North 18.4 mph 25.3 mph N/A   Mostly Cloudy
6:53 PM 28.0 °F 15.3 °F 16.0 °F 61% 30.22 in 10.0 mi North 18.4 mph 27.6 mph N/A   Overcast
7:53 PM 27.0 °F 14.3 °F 15.1 °F 61% 30.24 in 10.0 mi North 17.3 mph 24.2 mph N/A   Overcast
8:53 PM 26.1 °F 15.6 °F 15.1 °F 63% 30.27 in 10.0 mi NNW 11.5 mph - N/A   Mostly Cloudy
9:53 PM 25.0 °F 16.3 °F 16.0 °F 69% 30.29 in 10.0 mi NNW 8.1 mph - N/A   Overcast
10:53 PM 25.0 °F 14.8 °F 16.0 °F 69% 30.30 in 10.0 mi North 10.4 mph - N/A   Overcast
11:53 PM 23.0 °F 14.7 °F 15.1 °F 72% 30.29 in 10.0 mi NW 6.9 mph - N/A   Overcast