Helena, MT

3:34 AM MST on December 14, 2017 (GMT -0700)
Helena Regional

Weather History for KHLN - September, 2011

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Tuesday, September 13, 2011

  Actual Average Record
Temperature  
Mean Temperature 61 °F 59 °F  
Max Temperature 73 °F 74 °F 92 °F (1959)
Min Temperature 49 °F 44 °F 27 °F (1974)
Degree Days  
Heating Degree Days 4 7  
Month to date heating degree days 31 67  
Since 1 July heating degree days 39 136  
Cooling Degree Days 0 1  
Month to date cooling degree days 19 18  
Year to date cooling degree days 351 401  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 39 °F    
Average Humidity 48    
Maximum Humidity 66    
Minimum Humidity 29    
Precipitation  
Precipitation 0.00 in 0.04 in 0.75 in (1982)
Month to date precipitation T 0.52  
Year to date precipitation 11.85 9.07  
Snow  
Snow 0.00 in 0.00 in 4.10 in (1982)
Month to date snowfall 0.0 0.4  
Since 1 July snowfall 0.0 0.7  
Since 1 September snowfall 0.0 0.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 8 mph (NW)    
Max Wind Speed 18 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Date:

Astronomy

Sep. 13, 2011 Rise Set
Actual Time 7:02 AM MDT 7:43 PM MDT
Civil Twilight 6:32 AM MDT 8:14 PM MDT
Nautical Twilight 5:56 AM MDT 8:50 PM MDT
Astronomical Twilight 5:18 AM MDT 9:28 PM MDT
Moon 7:50 PM MDT (9/13) 8:29 AM MDT (9/13)
Length of Visible Light 13h 41m
Length of Day
12h 40m
Full, 98% of the Moon is Illuminated
Sep 13
Full
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter
Oct 11
Full

Hourly Weather History & Observations

Time (MDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
3:53 AM 53.1 °F 39.9 °F 61% 30.18 in 10.0 mi West 9.2 mph - N/A   Clear
4:53 AM 52.0 °F 39.0 °F 61% 30.18 in 10.0 mi West 9.2 mph - N/A   Clear
5:53 AM 51.1 °F 39.0 °F 63% 30.19 in 10.0 mi WSW 6.9 mph - N/A   Clear
6:53 AM 50.0 °F 39.0 °F 66% 30.22 in 10.0 mi WSW 8.1 mph - N/A   Clear
7:53 AM 51.1 °F 39.0 °F 63% 30.24 in 10.0 mi West 6.9 mph - N/A   Clear
8:53 AM 54.0 °F 39.9 °F 59% 30.25 in 10.0 mi WNW 6.9 mph - N/A   Clear
9:53 AM 57.0 °F 39.9 °F 53% 30.24 in 10.0 mi WNW 4.6 mph - N/A   Clear
10:53 AM 61.0 °F 39.9 °F 46% 30.24 in 10.0 mi NNW 4.6 mph - N/A   Clear
11:53 AM 62.6 °F 41.0 °F 45% 30.23 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 66.0 °F 41.0 °F 40% 30.19 in 10.0 mi North 4.6 mph - N/A   Clear
1:53 PM 69.1 °F 41.0 °F 36% 30.17 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:53 PM 71.1 °F 41.0 °F 34% 30.16 in 10.0 mi NNE 6.9 mph - N/A   Clear
3:53 PM 73.0 °F 39.9 °F 30% 30.13 in 10.0 mi NNE 8.1 mph - N/A   Clear
4:53 PM 69.8 °F 41.0 °F 35% 30.13 in 10.0 mi North 10.4 mph - N/A   Clear
5:53 PM 69.1 °F 41.0 °F 36% 30.13 in 10.0 mi North 11.5 mph - N/A   Clear
6:53 PM 64.4 °F 39.2 °F 40% 30.14 in 10.0 mi NNW 13.8 mph - N/A   Clear
7:53 PM 62.1 °F 39.0 °F 43% 30.16 in 10.0 mi NW 9.2 mph - N/A   Clear
8:53 PM 60.1 °F 39.0 °F 46% 30.18 in 10.0 mi WNW 9.2 mph - N/A   Clear
9:53 PM 57.9 °F 37.9 °F 47% 30.20 in 10.0 mi WNW 9.2 mph - N/A   Clear
10:53 PM 55.9 °F 36.0 °F 47% 30.21 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
11:53 PM 54.0 °F 36.0 °F 51% 30.22 in 10.0 mi West 8.1 mph - N/A   Clear