Weather History for Helena, MT

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Friday, February 21, 2014

  Actual Average Record
Temperature  
Mean Temperature 26 °F 29 °F  
Max Temperature 34 °F 40 °F 63 °F (1961)
Min Temperature 18 °F 18 °F -23 °F (1910)
Degree Days  
Heating Degree Days 39 36  
Month to date heating degree days 960 800  
Since 1 July heating degree days 5124 5318  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 22 °F    
Average Humidity 77    
Maximum Humidity 100    
Minimum Humidity 53    
Precipitation  
Precipitation 0.17 in 0.02 in 0.49 in (1914)
Month to date precipitation 0.85 0.22  
Year to date precipitation 1.40 0.58  
Snow  
Snow 3.30 in 0.20 in 5.50 in (1914)
Month to date snowfall 10.1 3.9  
Since 1 July snowfall 21.6 26.2  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 29.91 in    
Wind  
Wind Speed 10 mph (WNW)    
Max Wind Speed 22 mph    
Max Gust Speed 28 mph    
Visibility 5 miles    
Events Fog , Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Feb. 21, 2014 Rise Set
Actual Time 7:21 AM MST 6:02 PM MST
Civil Twilight 6:50 AM MST 6:32 PM MST
Nautical Twilight 6:15 AM MST 7:08 PM MST
Astronomical Twilight 5:40 AM MST 7:43 PM MST
Moon 12:22 AM MST (2/21) 10:24 AM MST (2/21)
Length of Visible Light 11h 42m
Length of Day
10h 40m
Waning Gibbous, 60% of the Moon is Illuminated
Feb 21
Waning Gibbous
Feb 22
Last Quarter
Mar 1
New
Mar 8
First Quarter
Mar 16
Full

Hourly Weather History & Observations

Time (MST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 30.9 °F 21.2 °F 19.9 °F 64% 29.95 in 10.0 mi WSW 12.7 mph - N/A   Overcast
1:53 AM 30.0 °F 19.5 °F 18.0 °F 61% 29.94 in 10.0 mi West 13.8 mph 18.4 mph N/A   Clear
2:53 AM 30.0 °F 24.1 °F 17.1 °F 59% 29.94 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
3:53 AM 30.0 °F 19.1 °F 21.0 °F 69% 29.94 in 9.0 mi WSW 15.0 mph - 0.00 in Snow Light Snow
4:14 AM 28.4 °F 18.5 °F 24.8 °F 86% 29.82 in 2.0 mi West 11.5 mph - 0.00 in Snow Light Snow
4:24 AM 28.4 °F 21.2 °F 24.8 °F 86% 29.81 in 3.0 mi West 6.9 mph - 0.00 in Snow Light Snow
4:51 AM 28.4 °F 22.2 °F 24.8 °F 86% 29.81 in 2.5 mi West 5.8 mph - 0.00 in Snow Light Snow
4:53 AM 28.0 °F 22.8 °F 24.1 °F 85% 29.94 in 2.5 mi West 4.6 mph - 0.00 in Snow Light Snow
5:04 AM 28.4 °F - 24.8 °F 86% 29.81 in 1.8 mi Calm Calm - 0.01 in Snow Light Snow
5:09 AM 28.4 °F - 24.8 °F 86% 29.81 in 3.0 mi Calm Calm - 0.01 in Snow Light Snow
5:17 AM 28.4 °F - 24.8 °F 86% 29.81 in 4.0 mi Calm Calm - 0.01 in Snow Light Snow
5:21 AM 28.4 °F - 24.8 °F 86% 29.81 in 2.5 mi Calm Calm - 0.01 in Snow Light Snow
5:27 AM 28.4 °F - 26.6 °F 93% 29.81 in 1.2 mi Calm Calm - 0.01 in Snow Light Snow
5:39 AM 28.4 °F - 26.6 °F 93% 29.80 in 2.0 mi Calm Calm - 0.01 in Snow Light Snow
5:48 AM 28.4 °F 24.6 °F 24.8 °F 86% 29.81 in 3.0 mi ENE 3.5 mph - 0.01 in Snow Light Snow
5:53 AM 28.0 °F 22.8 °F 25.0 °F 88% 29.95 in 2.0 mi NE 4.6 mph - 0.01 in Snow Light Snow
6:04 AM 28.4 °F 22.2 °F 26.6 °F 93% 29.81 in 1.5 mi NNE 5.8 mph - 0.00 in Snow Light Snow
6:11 AM 26.6 °F 20.0 °F 26.6 °F 100% 29.81 in 1.0 mi NE 5.8 mph - 0.01 in Snow Light Snow
6:16 AM 26.6 °F 20.0 °F 26.6 °F 100% 29.81 in 0.8 mi NNE 5.8 mph - 0.01 in Snow Light Snow
6:28 AM 26.6 °F 21.2 °F 26.6 °F 100% 29.81 in 0.2 mi North 4.6 mph - 0.04 in Fog , Snow Heavy Snow
6:42 AM 26.6 °F - 26.6 °F 100% 29.80 in 0.2 mi Calm Calm - 0.08 in Fog , Snow Heavy Snow
6:53 AM 27.0 °F - 26.1 °F 96% 29.96 in 0.5 mi Calm Calm - 0.11 in Fog , Snow Snow
7:12 AM 28.4 °F 24.6 °F 26.6 °F 93% 29.80 in 0.8 mi West 3.5 mph - 0.03 in Snow Light Snow
7:15 AM 26.6 °F 22.6 °F 26.6 °F 100% 29.80 in 1.2 mi NW 3.5 mph - 0.03 in Snow Light Snow
7:17 AM 26.6 °F - 24.8 °F 93% 29.81 in 2.0 mi Calm Calm - 0.03 in Snow Light Snow
7:23 AM 28.4 °F 23.3 °F 24.8 °F 86% 29.81 in 6.0 mi NW 4.6 mph - 0.03 in Snow Light Snow
7:35 AM 28.4 °F - 24.8 °F 86% 29.80 in 1.5 mi Calm Calm - 0.03 in Snow Light Snow
7:47 AM 26.6 °F 22.6 °F 24.8 °F 93% 29.82 in 2.0 mi NNE 3.5 mph - 0.03 in Snow Light Snow
7:53 AM 27.0 °F 20.5 °F 25.0 °F 92% 29.98 in 4.0 mi North 5.8 mph - 0.03 in Snow Light Snow
8:02 AM 26.6 °F 21.2 °F 26.6 °F 100% 29.84 in 2.5 mi WNW 4.6 mph - 0.00 in Snow Light Snow
8:11 AM 28.4 °F 15.8 °F 24.8 °F 86% 29.84 in 1.5 mi WNW 18.4 mph 26.5 mph 0.00 in Snow Light Snow
8:14 AM 28.4 °F 18.0 °F 23.0 °F 80% 29.84 in 2.0 mi WNW 12.7 mph 26.5 mph 0.00 in Snow Light Snow
8:23 AM 28.4 °F 18.0 °F 21.2 °F 74% 29.85 in 8.0 mi West 12.7 mph 20.7 mph 0.00 in Snow Light Snow
8:30 AM 28.4 °F 19.7 °F 21.2 °F 74% 29.84 in 10.0 mi West 9.2 mph - 0.00 in   Overcast
8:53 AM 28.9 °F 17.3 °F 17.1 °F 61% 30.00 in 10.0 mi West 16.1 mph 23.0 mph 0.00 in   Mostly Cloudy
9:53 AM 30.0 °F 18.3 °F 16.0 °F 56% 29.99 in 10.0 mi West 17.3 mph - N/A   Mostly Cloudy
10:53 AM 30.0 °F 18.7 °F 19.0 °F 64% 30.01 in 10.0 mi West 16.1 mph 23.0 mph N/A   Scattered Clouds
11:53 AM 32.0 °F 21.2 °F 18.0 °F 56% 30.00 in 10.0 mi West 16.1 mph 26.5 mph N/A   Mostly Cloudy
12:53 PM 32.0 °F 24.2 °F 19.0 °F 59% 29.99 in 10.0 mi West 9.2 mph - N/A   Overcast
1:39 PM 28.4 °F 16.6 °F 21.2 °F 74% 29.85 in 1.5 mi West 16.1 mph - 0.00 in Snow Light Snow
1:42 PM 28.4 °F 17.0 °F 21.2 °F 74% 29.85 in 0.8 mi WSW 15.0 mph - 0.00 in Snow Light Snow
1:50 PM 28.4 °F 17.5 °F 23.0 °F 80% 29.86 in 0.8 mi West 13.8 mph - 0.00 in Snow Light Snow
1:53 PM 28.0 °F 17.5 °F 23.0 °F 81% 30.01 in 1.0 mi West 12.7 mph - 0.00 in Snow Light Snow
2:00 PM 28.4 °F 18.0 °F 23.0 °F 80% 29.86 in 2.0 mi West 12.7 mph - 0.00 in Snow Light Snow
2:06 PM 28.4 °F 14.7 °F 23.0 °F 80% 29.85 in 1.0 mi WSW 21.9 mph 27.6 mph 0.00 in Snow Light Snow
2:13 PM 26.6 °F 13.8 °F 23.0 °F 86% 29.85 in 0.5 mi West 17.3 mph 27.6 mph 0.01 in Fog , Snow Snow
2:26 PM 28.4 °F 18.0 °F 23.0 °F 80% 29.84 in 1.5 mi WSW 12.7 mph - 0.01 in Snow Light Snow
2:29 PM 28.4 °F 18.0 °F 23.0 °F 80% 29.84 in 3.0 mi WSW 12.7 mph - 0.01 in Snow Light Snow
2:49 PM 28.4 °F 20.4 °F 21.2 °F 74% 29.84 in 10.0 mi West 8.1 mph - 0.01 in   Overcast
2:53 PM 30.0 °F 22.4 °F 21.0 °F 69% 29.99 in 10.0 mi West 8.1 mph - 0.01 in   Overcast
3:46 PM 28.4 °F 17.0 °F 21.2 °F 74% 29.85 in 2.5 mi NW 15.0 mph 20.7 mph 0.00 in Snow Light Snow
3:53 PM 28.9 °F 19.8 °F 21.0 °F 72% 30.00 in 3.0 mi WNW 10.4 mph - 0.00 in Snow Light Snow
3:55 PM 28.4 °F 20.4 °F 21.2 °F 74% 29.85 in 3.0 mi WNW 8.1 mph - 0.00 in Snow Light Snow
4:53 PM 28.0 °F 18.6 °F 21.9 °F 78% 30.01 in 9.0 mi WSW 10.4 mph - 0.00 in   Overcast
5:53 PM 28.0 °F 18.1 °F 19.0 °F 69% 30.01 in 10.0 mi WSW 11.5 mph - N/A   Overcast
6:53 PM 28.0 °F 17.5 °F 15.1 °F 58% 30.04 in 10.0 mi WNW 12.7 mph - N/A   Overcast
7:53 PM 25.0 °F 17.1 °F 17.1 °F 72% 30.07 in 10.0 mi North 6.9 mph - N/A   Overcast
8:53 PM 24.1 °F 12.5 °F 16.0 °F 71% 30.10 in 10.0 mi NNW 12.7 mph - N/A   Overcast
9:28 PM 23.0 °F 13.9 °F 17.6 °F 80% 29.94 in 3.0 mi WNW 8.1 mph - 0.00 in Snow Light Snow
9:53 PM 21.9 °F 14.5 °F 18.0 °F 85% 30.12 in 6.0 mi NW 5.8 mph - 0.00 in Snow Light Snow
10:00 PM 21.2 °F 10.1 °F 17.6 °F 86% 29.95 in 1.8 mi NW 10.4 mph - 0.00 in Snow Light Snow
10:09 PM 21.2 °F 11.7 °F 17.6 °F 86% 29.95 in 1.0 mi WNW 8.1 mph - 0.00 in Snow Light Snow
10:28 PM 21.2 °F 10.1 °F 17.6 °F 86% 29.96 in 2.0 mi NW 10.4 mph - 0.01 in Snow Light Snow
10:37 PM 21.2 °F 10.9 °F 15.8 °F 80% 29.96 in 6.0 mi NW 9.2 mph - 0.01 in Snow Light Snow
10:53 PM 21.0 °F 10.6 °F 15.1 °F 78% 30.13 in 10.0 mi WNW 9.2 mph - 0.01 in   Overcast
11:53 PM 18.0 °F 6.9 °F 9.0 °F 68% 30.16 in 10.0 mi NW 9.2 mph - N/A   Mostly Cloudy