Weather History for Helena, MT

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Sunday, June 30, 2013

  Actual Average Record
Temperature  
Mean Temperature 75 °F 66 °F  
Max Temperature 91 °F 81 °F 99 °F (2008)
Min Temperature 59 °F 52 °F 34 °F (1949)
Degree Days  
Heating Degree Days 0 2  
Month to date heating degree days 146 135  
Since 1 June heating degree days 146 136  
Since 1 July heating degree days 7166 7541  
Cooling Degree Days 10 3  
Month to date cooling degree days 42 49  
Year to date cooling degree days 49 57  
Since 1 June cooling degree days 42 49  
Growing Degree Days 26 (Base 50)    
Moisture  
Dew Point 54 °F    
Average Humidity 52    
Maximum Humidity 78    
Minimum Humidity 26    
Precipitation  
Precipitation 0.00 in 0.05 in 1.14 in (1898)
Month to date precipitation 1.95 2.06  
Year to date precipitation 5.53 6.16  
Snow  
Snow 0.00 in 0.00 in 0.00 in (1999)
Month to date snowfall 0.0 T  
Since 1 June snowfall 0.0 T  
Since 1 July snowfall 39.7 38.1  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.08 in    
Wind  
Wind Speed 4 mph (North)    
Max Wind Speed 14 mph    
Max Gust Speed 16 mph    
Visibility 10 miles    
Events Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jun. 30, 2013 Rise Set
Actual Time 5:38 AM MDT 9:24 PM MDT
Civil Twilight 4:59 AM MDT 10:04 PM MDT
Nautical Twilight 4:06 AM MDT 10:56 PM MDT
Astronomical Twilight 2:50 AM MDT 12:11 AM MDT
Moon 12:57 AM MDT (6/30) 2:27 PM MDT (6/30)
Length of Visible Light 17h 04m
Length of Day
15h 46m
Last Quarter, 45% of the Moon is Illuminated
Jun 30
Last Quarter
Jul 8
New
Jul 15
First Quarter
Jul 22
Full
Jul 29
Last 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 66.9 °F - 54.0 °F 63% 30.06 in 10.0 mi Calm Calm - N/A   Clear
1:53 AM 62.1 °F - 54.0 °F 75% 30.06 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 62.1 °F - 53.1 °F 72% 30.06 in 10.0 mi West 6.9 mph - N/A   Clear
3:53 AM 61.0 °F - 52.0 °F 72% 30.08 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 62.1 °F - 52.0 °F 70% 30.08 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:53 AM 60.1 °F - 52.0 °F 75% 30.09 in 10.0 mi WSW 4.6 mph - N/A   Clear
6:53 AM 60.1 °F - 53.1 °F 78% 30.09 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:53 AM 64.0 °F - 54.0 °F 70% 30.11 in 10.0 mi NNW 3.5 mph - N/A   Clear
8:23 AM 66.2 °F - 53.6 °F 64% 30.16 in 10.0 mi Calm Calm - N/A Thunderstorm Clear
8:49 AM 66.2 °F - 53.6 °F 64% 30.16 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:53 AM 66.9 °F - 55.0 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:53 AM 70.0 °F - 54.0 °F 57% 30.11 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 75.0 °F - 55.0 °F 50% 30.10 in 10.0 mi Calm Calm - N/A   Clear
11:53 AM 79.0 °F - 55.0 °F 44% 30.09 in 10.0 mi Calm Calm - N/A   Clear
12:53 PM 82.0 °F 81.6 °F 55.9 °F 41% 30.07 in 10.0 mi NE 5.8 mph - N/A   Clear
1:53 PM 86.0 °F 84.2 °F 54.0 °F 33% 30.06 in 10.0 mi NE 5.8 mph - N/A   Clear
2:53 PM 88.0 °F 85.7 °F 53.1 °F 30% 30.05 in 10.0 mi Variable 5.8 mph - N/A   Clear
3:53 PM 87.1 °F 85.1 °F 54.0 °F 32% 30.04 in 10.0 mi East 4.6 mph - N/A   Clear
4:53 PM 90.0 °F - 52.0 °F 27% 30.02 in 10.0 mi North 11.5 mph - N/A   Clear
5:53 PM 91.0 °F - 52.0 °F 26% 30.02 in 10.0 mi NE 6.9 mph - N/A   Clear
6:53 PM 89.1 °F - 52.0 °F 28% 30.03 in 10.0 mi NNE 9.2 mph - N/A   Clear
7:53 PM 87.1 °F 85.1 °F 54.0 °F 32% 30.03 in 10.0 mi North 6.9 mph - N/A   Clear
8:53 PM 82.0 °F 81.6 °F 55.9 °F 41% 30.04 in 10.0 mi North 8.1 mph - N/A   Clear
9:53 PM 79.0 °F - 55.0 °F 44% 30.07 in 10.0 mi Calm Calm - N/A   Clear
10:53 PM 73.0 °F - 55.9 °F 55% 30.09 in 10.0 mi West 6.9 mph - N/A   Clear
11:53 PM 73.0 °F - 55.0 °F 53% 30.10 in 10.0 mi West 9.2 mph - N/A   Clear