Weather History for Helena, MT

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Thursday, May 23, 2013

  Actual Average Record
Temperature  
Mean Temperature 46 °F 56 °F  
Max Temperature 54 °F 69 °F 89 °F (2001)
Min Temperature 37 °F 43 °F 26 °F (1944)
Degree Days  
Heating Degree Days 19 9  
Month to date heating degree days 239 284  
Since 1 July heating degree days 6930 7338  
Cooling Degree Days 0 0  
Month to date cooling degree days 7 0  
Year to date cooling degree days 7 0  
Moisture  
Dew Point 36 °F    
Average Humidity 70    
Maximum Humidity 89    
Minimum Humidity 50    
Precipitation  
Precipitation 0.51 in 0.07 in 0.71 in (2008)
Month to date precipitation 1.40 1.26  
Year to date precipitation 2.94 3.49  
Snow  
Snow 0.00 in 0.00 in 1.50 in (1911)
Month to date snowfall 0.0 0.8  
Since 1 July snowfall 39.7 38.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.95 in    
Wind  
Wind Speed 7 mph (West)    
Max Wind Speed 25 mph    
Max Gust Speed 31 mph    
Visibility 8 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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Astronomy

May. 23, 2013 Rise Set
Actual Time 5:45 AM MDT 9:05 PM MDT
Civil Twilight 5:08 AM MDT 9:42 PM MDT
Nautical Twilight 4:19 AM MDT 10:30 PM MDT
Astronomical Twilight 3:18 AM MDT 11:32 PM MDT
Moon 7:37 PM MDT 4:39 AM MDT
Length of Visible Light 16h 34m
Length of Day
15h 20m
Waxing Gibbous, 97% of the Moon is Illuminated
May 23
Waxing Gibbous
May 24
Full
May 31
Last Quarter
Jun 8
New
Jun 16
First 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 44.1 °F - 39.9 °F 85% 29.89 in 4.0 mi Calm Calm - 0.08 in Rain Light Rain
1:23 AM 44.6 °F 41.4 °F 39.2 °F 81% 29.87 in 4.0 mi WSW 5.8 mph - 0.02 in Rain Light Rain
1:32 AM 42.8 °F 36.6 °F 39.2 °F 87% 29.86 in 4.0 mi West 11.5 mph 16.1 mph 0.05 in Rain Rain
1:53 AM 43.0 °F 41.3 °F 39.0 °F 86% 29.89 in 7.0 mi South 3.5 mph - 0.07 in Rain Light Rain
2:53 AM 42.1 °F 37.7 °F 37.9 °F 85% 29.91 in 5.0 mi WNW 6.9 mph - 0.09 in Rain Light Rain
3:53 AM 39.9 °F 32.9 °F 35.1 °F 83% 29.93 in 10.0 mi West 11.5 mph - 0.05 in Rain Light Rain
4:53 AM 39.9 °F 36.7 °F 36.0 °F 86% 29.91 in 8.0 mi WNW 4.6 mph - 0.03 in Rain Light Rain
5:23 AM 39.2 °F 33.6 °F 35.6 °F 87% 29.90 in 6.0 mi West 8.1 mph - 0.02 in Rain Light Rain
5:39 AM 39.2 °F 34.2 °F 35.6 °F 87% 29.92 in 8.0 mi West 6.9 mph - 0.03 in Rain Light Rain
5:53 AM 39.0 °F 32.3 °F 35.1 °F 86% 29.95 in 5.0 mi WNW 10.4 mph - 0.04 in Rain Rain
6:53 AM 37.9 °F 32.1 °F 34.0 °F 86% 29.96 in 4.0 mi West 8.1 mph - 0.04 in Rain Light Rain
7:39 AM 37.4 °F 31.4 °F 33.8 °F 87% 29.94 in 10.0 mi WSW 8.1 mph - 0.00 in Rain Light Rain
7:53 AM 39.0 °F - 34.0 °F 82% 29.99 in 4.0 mi Calm Calm - 0.01 in Rain Light Rain
8:27 AM 37.4 °F 32.1 °F 33.8 °F 87% 29.94 in 5.0 mi WNW 6.9 mph - 0.05 in Rain Light Rain
8:53 AM 37.9 °F - 34.0 °F 86% 30.00 in 9.0 mi Calm Calm - 0.09 in Rain Light Rain
9:05 AM 37.4 °F - 33.8 °F 87% 29.94 in 10.0 mi Calm Calm - 0.00 in   Overcast
9:53 AM 39.9 °F - 36.0 °F 86% 29.99 in 10.0 mi Calm Calm - 0.00 in   Overcast
10:01 AM 41.0 °F 39.0 °F 37.4 °F 87% 29.94 in 10.0 mi East 3.5 mph - N/A   Overcast
10:53 AM 42.1 °F 39.2 °F 36.0 °F 79% 29.99 in 10.0 mi North 4.6 mph - N/A   Overcast
11:53 AM 46.0 °F 40.2 °F 34.0 °F 63% 29.97 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
12:53 PM 46.0 °F 40.6 °F 32.0 °F 58% 29.99 in 10.0 mi WNW 11.5 mph - N/A   Overcast
1:53 PM 46.9 °F - 32.0 °F 56% 29.99 in 10.0 mi WNW 10.4 mph - N/A   Overcast
2:53 PM 50.0 °F - 34.0 °F 54% 29.97 in 10.0 mi Variable 3.5 mph - N/A   Overcast
3:53 PM 51.1 °F - 36.0 °F 56% 29.96 in 10.0 mi ENE 4.6 mph - N/A   Partly Cloudy
4:53 PM 53.1 °F - 35.1 °F 50% 29.95 in 10.0 mi WNW 8.1 mph - N/A   Mostly Cloudy
5:53 PM 54.0 °F - 35.1 °F 49% 29.92 in 10.0 mi WNW 10.4 mph - N/A   Overcast
6:53 PM 51.1 °F - 35.1 °F 54% 29.94 in 10.0 mi West 13.8 mph - N/A   Overcast
7:53 PM 46.9 °F - 35.1 °F 63% 29.95 in 10.0 mi West 12.7 mph 21.9 mph N/A   Overcast
8:53 PM 46.9 °F - 36.0 °F 66% 29.99 in 10.0 mi SW 23.0 mph 28.8 mph N/A   Overcast
9:53 PM 43.0 °F 38.8 °F 37.0 °F 80% 30.01 in 10.0 mi West 6.9 mph 16.1 mph 0.04 in   Overcast
10:53 PM 43.0 °F 41.3 °F 37.9 °F 82% 30.02 in 10.0 mi WSW 3.5 mph - 0.02 in   Overcast
11:53 PM 42.1 °F - 37.9 °F 85% 29.99 in 10.0 mi Calm Calm - 0.03 in   Overcast