Weather History for Helena, MT

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Wednesday, July 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 73 °F 71 °F  
Max Temperature 87 °F 87 °F 102 °F (2003)
Min Temperature 59 °F 55 °F 39 °F (1972)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 0 22  
Since 1 June heating degree days 146 158  
Since 1 July heating degree days 0 22  
Cooling Degree Days 8 6  
Month to date cooling degree days 144 87  
Year to date cooling degree days 193 144  
Since 1 June cooling degree days 186 136  
Growing Degree Days 23 (Base 50)    
Moisture  
Dew Point 59 °F    
Average Humidity 70    
Maximum Humidity 97    
Minimum Humidity 43    
Precipitation  
Precipitation 0.60 in 0.04 in 0.82 in (1987)
Month to date precipitation 0.65 0.70  
Year to date precipitation 6.18 6.86  
Snow  
Snow 0.00 in 0.00 in T in (1993)
Month to date snowfall 0.0 0.0  
Since 1 June snowfall 0.0 T  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.09 in    
Wind  
Wind Speed 5 mph (SW)    
Max Wind Speed 22 mph    
Max Gust Speed 30 mph    
Visibility 9 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Jul. 17, 2013 Rise Set
Actual Time 5:51 AM MDT 9:15 PM MDT
Civil Twilight 5:14 AM MDT 9:52 PM MDT
Nautical Twilight 4:25 AM MDT 10:41 PM MDT
Astronomical Twilight 3:22 AM MDT 11:44 PM MDT
Moon 4:04 PM MDT (7/17) 1:08 AM MDT (7/17)
Length of Visible Light 16h 38m
Length of Day
15h 23m
Waxing Gibbous, 68% of the Moon is Illuminated
Jul 17
Waxing Gibbous
Jul 22
Full
Jul 29
Last Quarter
Aug 6
New
Aug 14
First Quarter

Hourly Weather History & Observations

Time (MDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 63.0 °F - 55.9 °F 78% 30.15 in 5.0 mi WSW 11.5 mph - 0.02 in Rain Rain
1:53 AM 63.0 °F - 57.0 °F 81% 30.12 in 10.0 mi Calm Calm - 0.06 in   Overcast
2:53 AM 63.0 °F - 59.0 °F 87% 30.12 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:53 AM 61.0 °F - 59.0 °F 93% 30.12 in 10.0 mi NNE 3.5 mph - N/A   Mostly Cloudy
4:53 AM 60.1 °F - 57.9 °F 93% 30.12 in 10.0 mi West 5.8 mph - N/A   Clear
5:53 AM 60.1 °F - 55.9 °F 86% 30.13 in 10.0 mi West 5.8 mph - N/A   Clear
6:53 AM 60.1 °F - 57.0 °F 90% 30.14 in 10.0 mi WNW 4.6 mph - N/A   Clear
7:53 AM 64.0 °F - 57.0 °F 78% 30.14 in 10.0 mi West 5.8 mph - N/A   Clear
8:53 AM 66.0 °F - 55.9 °F 70% 30.14 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 68.0 °F - 55.9 °F 65% 30.13 in 10.0 mi East 4.6 mph - N/A   Clear
10:53 AM 70.0 °F - 55.9 °F 61% 30.11 in 10.0 mi NE 3.5 mph - N/A   Clear
11:53 AM 73.0 °F - 57.0 °F 57% 30.10 in 10.0 mi East 3.5 mph - N/A   Clear
12:53 PM 78.1 °F - 57.0 °F 48% 30.08 in 10.0 mi Variable 4.6 mph - N/A   Clear
1:53 PM 82.0 °F 82.0 °F 57.9 °F 44% 30.04 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:53 PM 82.9 °F 82.4 °F 57.0 °F 41% 30.01 in 10.0 mi Variable 5.8 mph - N/A   Clear
3:53 PM 82.9 °F 82.6 °F 57.9 °F 42% 29.97 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
4:07 PM 78.8 °F - 64.4 °F 61% 30.03 in 7.0 mi Calm Calm - 0.01 in Rain , Thunderstorm Light Thunderstorms and Rain
4:31 PM 82.4 °F 82.9 °F 60.8 °F 48% 30.01 in 10.0 mi NE 6.9 mph - 0.03 in Thunderstorm Scattered Clouds
4:53 PM 75.0 °F - 66.0 °F 73% 29.99 in 3.0 mi WSW 13.8 mph - 0.11 in Rain , Thunderstorm Thunderstorms and Rain
5:29 PM 71.6 °F - 60.8 °F 69% 30.03 in 7.0 mi South 5.8 mph - 0.03 in Rain Light Rain
5:44 PM 71.6 °F - 62.6 °F 73% 30.03 in 10.0 mi SSE 10.4 mph - 0.03 in Thunderstorm Thunderstorm
5:53 PM 72.0 °F - 61.0 °F 68% 30.01 in 10.0 mi SE 15.0 mph 18.4 mph 0.03 in Thunderstorm Thunderstorm
6:21 PM 69.8 °F - 62.6 °F 78% 30.11 in 1.8 mi West 17.3 mph 28.8 mph 0.04 in Rain , Thunderstorm Heavy Thunderstorms and Rain
6:24 PM 68.0 °F - 62.6 °F 83% 30.11 in 0.8 mi Variable 4.6 mph 28.8 mph 0.10 in Rain , Thunderstorm Heavy Thunderstorms and Rain
6:35 PM 69.8 °F - 62.6 °F 78% 30.13 in 1.0 mi SE 11.5 mph 17.3 mph 0.34 in Rain , Thunderstorm Thunderstorms and Rain
6:38 PM 69.8 °F - 60.8 °F 73% 30.12 in 4.0 mi ESE 12.7 mph - 0.35 in Rain , Thunderstorm Thunderstorms and Rain
6:53 PM 69.1 °F - 60.1 °F 73% 30.09 in 6.0 mi SE 12.7 mph - 0.38 in Rain , Thunderstorm Light Thunderstorms and Rain
7:21 PM 68.0 °F - 60.8 °F 78% 30.05 in 10.0 mi SSE 19.6 mph 29.9 mph 0.01 in   Scattered Clouds
7:53 PM 73.0 °F - 57.9 °F 59% 30.05 in 10.0 mi Variable 4.6 mph - 0.01 in   Clear
8:50 PM 66.2 °F - 60.8 °F 83% 30.09 in 10.0 mi Calm Calm - N/A Thunderstorm Clear
8:53 PM 66.9 °F - 60.1 °F 79% 30.06 in 10.0 mi WSW 4.6 mph - N/A Thunderstorm Partly Cloudy
9:05 PM 68.0 °F - 60.8 °F 78% 30.13 in 7.0 mi WSW 16.1 mph - 0.00 in Rain Light Rain
9:35 PM 64.4 °F - 59.0 °F 83% 30.10 in 10.0 mi North 4.6 mph - 0.02 in Thunderstorm Mostly Cloudy
9:50 PM 66.2 °F - 62.6 °F 88% 30.12 in 10.0 mi SW 3.5 mph - 0.02 in   Mostly Cloudy
9:53 PM 66.0 °F - 62.1 °F 87% 30.09 in 10.0 mi WSW 3.5 mph - 0.02 in   Mostly Cloudy
10:53 PM 64.9 °F - 60.1 °F 84% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:53 PM 64.0 °F - 59.0 °F 84% 30.12 in 10.0 mi West 5.8 mph - N/A   Partly Cloudy