Weather History for Helena, MT

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Saturday, October 29, 2011

  Actual Average Record
Temperature  
Mean Temperature 42 °F 40 °F  
Max Temperature 51 °F 53 °F 73 °F (1968)
Min Temperature 33 °F 28 °F -2 °F (1991)
Degree Days  
Heating Degree Days 23 25  
Month to date heating degree days 503 551  
Since 1 July heating degree days 633 857  
Cooling Degree Days 0 0  
Month to date cooling degree days 1 0  
Year to date cooling degree days 358 406  
Moisture  
Dew Point 24 °F    
Average Humidity 48    
Maximum Humidity 65    
Minimum Humidity 31    
Precipitation  
Precipitation T in 0.02 in 0.49 in (1992)
Month to date precipitation 0.55 0.65  
Year to date precipitation 12.44 10.30  
Snow  
Snow 0.00 in 0.10 in 4.10 in (1960)
Month to date snowfall 0.0 2.2  
Since 1 July snowfall 0.0 3.8  
Since 1 September snowfall 0.0 3.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.08 in    
Wind  
Wind Speed 13 mph (West)    
Max Wind Speed 36 mph    
Max Gust Speed 47 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Oct. 29, 2011 Rise Set
Actual Time 8:05 AM MDT 6:17 PM MDT
Civil Twilight 7:33 AM MDT 6:48 PM MDT
Nautical Twilight 6:58 AM MDT 7:24 PM MDT
Astronomical Twilight 6:23 AM MDT 7:59 PM MDT
Moon 11:43 AM MDT 8:33 PM MDT
Length of Visible Light 11h 15m
Length of Day
10h 12m
Waxing Crescent, 12% of the Moon is Illuminated
Oct 29
Waxing Crescent
Nov 2
First Quarter
Nov 10
Full
Nov 18
Last Quarter
Nov 24
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 35.1 °F 32.2 °F 21.0 °F 57% 29.96 in 10.0 mi Variable 3.5 mph - N/A   Clear
1:53 AM 48.9 °F - 19.0 °F 31% 29.91 in 10.0 mi West 12.7 mph - N/A   Clear
2:53 AM 46.9 °F - 26.1 °F 44% 29.89 in 10.0 mi WSW 8.1 mph - N/A   Partly Cloudy
3:53 AM 48.2 °F - 23.0 °F 37% 29.83 in 10.0 mi North 9.2 mph 16.1 mph N/A   Mostly Cloudy
4:53 AM 48.2 °F - 24.8 °F 40% 29.85 in 10.0 mi West 5.8 mph - N/A   Overcast
5:53 AM 50.0 °F - 28.0 °F 43% 29.91 in 10.0 mi WNW 9.2 mph - N/A   Overcast
6:53 AM 44.1 °F 37.1 °F 33.1 °F 65% 29.98 in 10.0 mi NW 15.0 mph - 0.00 in Rain Light Rain
7:53 AM 43.0 °F 36.0 °F 34.0 °F 71% 30.00 in 10.0 mi WSW 13.8 mph 19.6 mph 0.00 in   Mostly Cloudy
8:53 AM 44.1 °F 40.1 °F 33.1 °F 65% 30.04 in 10.0 mi WSW 6.9 mph - N/A   Overcast
9:53 AM 45.0 °F 38.5 °F 27.0 °F 49% 30.08 in 10.0 mi West 13.8 mph 24.2 mph N/A   Mostly Cloudy
10:53 AM 46.9 °F - 25.0 °F 42% 30.12 in 10.0 mi West 17.3 mph 26.5 mph N/A   Partly Cloudy
11:53 AM 48.9 °F - 23.0 °F 36% 30.14 in 10.0 mi West 27.6 mph 38.0 mph N/A   Partly Cloudy
12:53 PM 50.0 °F - 21.0 °F 32% 30.13 in 10.0 mi West 34.5 mph 47.2 mph N/A   Clear
1:53 PM 50.0 °F - 21.9 °F 33% 30.12 in 10.0 mi West 16.1 mph 38.0 mph N/A   Partly Cloudy
2:53 PM 48.9 °F - 21.9 °F 35% 30.13 in 10.0 mi West 23.0 mph 32.2 mph N/A   Overcast
3:53 PM 50.0 °F - 21.0 °F 32% 30.14 in 10.0 mi West 19.6 mph 28.8 mph N/A   Scattered Clouds
4:53 PM 48.0 °F - 21.0 °F 34% 30.16 in 10.0 mi West 13.8 mph 28.8 mph N/A   Clear
5:53 PM 46.9 °F - 21.0 °F 36% 30.17 in 10.0 mi West 10.4 mph 24.2 mph N/A   Clear
6:53 PM 44.1 °F 37.4 °F 21.9 °F 42% 30.22 in 10.0 mi West 13.8 mph 20.7 mph N/A   Clear
7:53 PM 42.1 °F 35.7 °F 23.0 °F 47% 30.23 in 10.0 mi West 11.5 mph - N/A   Clear
8:53 PM 42.1 °F 37.7 °F 24.1 °F 49% 30.23 in 10.0 mi WSW 6.9 mph - N/A   Clear
9:53 PM 41.0 °F 38.0 °F 24.1 °F 51% 30.24 in 10.0 mi SW 4.6 mph - N/A   Clear
10:53 PM 39.0 °F - 24.1 °F 55% 30.25 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 41.0 °F 35.8 °F 24.1 °F 51% 30.23 in 10.0 mi West 8.1 mph - N/A   Clear