Weather History for Helena, MT

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Saturday, October 1, 2011

  Actual Average Record
Temperature  
Mean Temperature 66 °F 52 °F  
Max Temperature 84 °F 66 °F 87 °F (1997)
Min Temperature 47 °F 38 °F 15 °F (1950)
Degree Days  
Heating Degree Days 0 13  
Month to date heating degree days 0 13  
Since 1 July heating degree days 130 319  
Cooling Degree Days 1 0  
Month to date cooling degree days 1 0  
Year to date cooling degree days 358 406  
Growing Degree Days 15 (Base 50)    
Moisture  
Dew Point 39 °F    
Average Humidity 47    
Maximum Humidity 72    
Minimum Humidity 22    
Precipitation  
Precipitation T in 0.03 in 0.33 in (1946)
Month to date precipitation T 0.03  
Year to date precipitation 11.89 9.68  
Snow  
Snow 0.00 in 0.10 in 3.50 in (1900)
Month to date snowfall 0.0 0.1  
Since 1 July snowfall 0.0 1.7  
Since 1 September snowfall 0.0 1.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.92 in    
Wind  
Wind Speed 4 mph (West)    
Max Wind Speed 35 mph    
Max Gust Speed 52 mph    
Visibility 10 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Oct. 01, 2011 Rise Set
Actual Time 7:26 AM MDT 7:08 PM MDT
Civil Twilight 6:56 AM MDT 7:38 PM MDT
Nautical Twilight 6:21 AM MDT 8:13 PM MDT
Astronomical Twilight 5:45 AM MDT 8:48 PM MDT
Moon 12:57 PM MDT (10/1) 9:47 PM MDT (10/1)
Length of Visible Light 12h 41m
Length of Day
11h 41m
Waxing Crescent, 25% of the Moon is Illuminated
Oct 1
Waxing Crescent
Oct 3
First Quarter
Oct 11
Full
Oct 19
Last Quarter
Oct 26
New

Hourly Weather History & Observations

Time (MDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 59.0 °F 36.0 °F 42% 29.94 in 10.0 mi WSW 4.6 mph - N/A   Clear
1:53 AM 54.0 °F 37.0 °F 53% 29.94 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 55.0 °F 37.0 °F 51% 29.93 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 53.1 °F 37.0 °F 55% 29.93 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 52.0 °F 35.1 °F 53% 29.91 in 10.0 mi Calm Calm - N/A   Clear
5:53 AM 50.0 °F 35.6 °F 58% 29.95 in 10.0 mi WSW 4.6 mph - N/A   Clear
6:53 AM 48.9 °F 35.1 °F 59% 29.94 in 10.0 mi Calm Calm - N/A   Clear
7:53 AM 50.0 °F 35.1 °F 57% 29.96 in 10.0 mi Calm Calm - N/A   Clear
8:53 AM 51.8 °F 35.6 °F 54% 29.97 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:53 AM 57.0 °F 36.0 °F 45% 29.96 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 61.0 °F 37.0 °F 41% 29.96 in 10.0 mi Calm Calm - N/A   Clear
11:53 AM 64.9 °F 37.0 °F 36% 29.94 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 70.0 °F 35.1 °F 28% 29.90 in 10.0 mi Variable 3.5 mph - N/A   Clear
1:53 PM 77.0 °F 36.0 °F 23% 29.86 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:53 PM 77.0 °F 39.0 °F 25% 29.83 in 10.0 mi WNW 8.1 mph - N/A   Clear
3:45 PM 80.6 °F 35.6 °F 20% 29.91 in 6.0 mi South 26.5 mph 51.8 mph N/A Thunderstorm Unknown
3:53 PM 75.9 °F 43.0 °F 31% 29.84 in 5.0 mi ESE 11.5 mph 42.6 mph 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
4:17 PM 80.6 °F 41.0 °F 24% 29.86 in 10.0 mi WSW 5.8 mph - 0.00 in   Partly Cloudy
4:53 PM 82.9 °F 39.9 °F 22% 29.81 in 10.0 mi WSW 12.7 mph 18.4 mph 0.00 in   Scattered Clouds
5:01 PM 80.6 °F 39.2 °F 23% 29.86 in 7.0 mi West 13.8 mph 50.6 mph 0.00 in Rain Light Rain
5:44 PM 69.8 °F 37.4 °F 31% 29.88 in 9.0 mi North 17.3 mph 31.1 mph 0.00 in   Clear
5:53 PM 66.9 °F 37.9 °F 34% 29.89 in 10.0 mi North 13.8 mph 23.0 mph 0.00 in   Clear
6:53 PM 64.4 °F 39.2 °F 40% 29.94 in 10.0 mi NW 8.1 mph - N/A   Scattered Clouds
7:02 PM 64.4 °F 39.2 °F 40% 29.95 in 9.0 mi NNW 11.5 mph - N/A Thunderstorm Thunderstorm
7:53 PM 61.0 °F 46.9 °F 60% 29.94 in 10.0 mi South 5.8 mph - 0.00 in Thunderstorm Thunderstorm
8:37 PM 60.8 °F 48.2 °F 63% 29.94 in 10.0 mi WSW 8.1 mph - N/A   Clear
8:53 PM 59.0 °F 48.0 °F 67% 29.95 in 10.0 mi West 8.1 mph - N/A   Clear
9:53 PM 57.9 °F 48.0 °F 70% 29.95 in 10.0 mi SW 4.6 mph - N/A   Clear
10:53 PM 55.9 °F 46.9 °F 72% 29.94 in 10.0 mi SW 3.5 mph - N/A   Clear
11:53 PM 55.9 °F 46.0 °F 69% 29.93 in 10.0 mi West 4.6 mph - N/A   Partly Cloudy