Weather History for Helena, MT

Change the Weather History Date:

Monday, August 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 74 °F 68 °F  
Max Temperature 92 °F 84 °F 96 °F (1967)
Min Temperature 55 °F 52 °F 39 °F (1995)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 14 14  
Since 1 June heating degree days 136 177  
Since 1 July heating degree days 14 41  
Cooling Degree Days 9 4  
Month to date cooling degree days 141 113  
Year to date cooling degree days 475 351  
Since 1 June cooling degree days 471 343  
Growing Degree Days 23 (Base 50)    
Moisture  
Dew Point 38 °F    
Average Humidity 32    
Maximum Humidity 51    
Minimum Humidity 13    
Precipitation  
Precipitation 0.00 in 0.04 in 1.89 in (1933)
Month to date precipitation 0.39 0.76  
Year to date precipitation 6.20 8.11  
Snow  
Snow 0.00 in 0.00 in 0.50 in (1990)
Month to date snowfall 0.0 0.1  
Since 1 June snowfall 0.0 0.1  
Since 1 July snowfall 0.0 0.1  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.96 in    
Wind  
Wind Speed 4 mph (WNW)    
Max Wind Speed 14 mph    
Max Gust Speed 16 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Aug. 20, 2012 Rise Set
Actual Time 6:33 AM MDT 8:28 PM MDT
Civil Twilight 6:00 AM MDT 9:00 PM MDT
Nautical Twilight 5:20 AM MDT 9:40 PM MDT
Astronomical Twilight 4:36 AM MDT 10:23 PM MDT
Moon 10:17 AM MDT (8/20) 9:34 PM MDT (8/20)
Length of Visible Light 14h 59m
Length of Day
13h 54m
Waxing Crescent, 11% of the Moon is Illuminated
Aug 20
Waxing Crescent
Aug 24
First Quarter
Aug 31
Full
Sep 8
Last Quarter
Sep 15
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 64.9 °F 36.0 °F 34% 29.94 in 10.0 mi South 3.5 mph - N/A   Clear
1:53 AM 61.0 °F 34.0 °F 36% 29.94 in 10.0 mi West 5.8 mph - N/A   Clear
2:53 AM 61.0 °F 34.0 °F 36% 29.94 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 62.1 °F 35.1 °F 37% 29.95 in 10.0 mi SSE 3.5 mph - N/A   Clear
4:53 AM 55.0 °F 37.0 °F 51% 29.97 in 10.0 mi North 3.5 mph - N/A   Clear
5:53 AM 57.9 °F 37.0 °F 46% 29.99 in 10.0 mi Calm Calm - N/A   Clear
6:53 AM 57.9 °F 37.0 °F 46% 30.00 in 10.0 mi Calm Calm - N/A   Clear
7:53 AM 57.0 °F 39.0 °F 51% 30.01 in 10.0 mi Calm Calm - N/A   Clear
8:53 AM 63.0 °F 37.0 °F 38% 30.01 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 66.9 °F 39.0 °F 36% 30.01 in 10.0 mi Variable 3.5 mph - N/A   Clear
10:53 AM 73.0 °F 39.0 °F 29% 30.00 in 10.0 mi Variable 4.6 mph - N/A   Clear
11:53 AM 78.1 °F 39.0 °F 25% 29.98 in 9.0 mi North 4.6 mph - N/A   Clear
12:53 PM 82.9 °F 39.9 °F 22% 29.96 in 9.0 mi Calm Calm - N/A   Clear
1:53 PM 87.1 °F 37.9 °F 18% 29.94 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:53 PM 88.0 °F 33.1 °F 14% 29.92 in 10.0 mi Variable 3.5 mph - N/A   Clear
3:53 PM 91.0 °F 34.0 °F 13% 29.89 in 10.0 mi NNE 5.8 mph - N/A   Clear
4:53 PM 89.1 °F 33.1 °F 14% 29.92 in 10.0 mi North 5.8 mph - N/A   Clear
5:53 PM 87.1 °F 39.0 °F 18% 29.91 in 10.0 mi North 6.9 mph - N/A   Clear
6:53 PM 84.0 °F 39.9 °F 21% 29.93 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 82.9 °F 39.0 °F 21% 29.94 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
8:53 PM 81.0 °F 39.0 °F 22% 29.94 in 10.0 mi WSW 8.1 mph - N/A   Clear
9:53 PM 79.0 °F 39.9 °F 25% 29.94 in 10.0 mi West 6.9 mph - N/A   Clear
10:53 PM 75.0 °F 39.9 °F 28% 29.95 in 10.0 mi West 8.1 mph - N/A   Clear
11:53 PM 70.0 °F 41.0 °F 35% 29.96 in 10.0 mi WSW 4.6 mph - N/A   Clear