Weather History for Butte, MT

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Saturday, December 15, 2012

  Actual Average Record
Temperature  
Mean Temperature 15 °F 17 °F  
Max Temperature 23 °F 29 °F 53 °F (1980)
Min Temperature 6 °F 5 °F -27 °F (1967)
Degree Days  
Heating Degree Days 50 48  
Month to date heating degree days 608 705  
Since 1 July heating degree days 2870 3195  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 121 81  
Moisture  
Dew Point 13 °F    
Average Humidity 88    
Maximum Humidity 92    
Minimum Humidity 84    
Precipitation  
Precipitation 0.00 in 0.02 in 0.30 in (1947)
Month to date precipitation 0.24 0.25  
Year to date precipitation 9.00 12.51  
Sea Level Pressure  
Sea Level Pressure 29.84 in    
Wind  
Wind Speed 2 mph (SSE)    
Max Wind Speed 9 mph    
Max Gust Speed 14 mph    
Visibility 5 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 15, 2012 Rise Set
Actual Time 8:05 AM MST 4:45 PM MST
Civil Twilight 7:30 AM MST 5:20 PM MST
Nautical Twilight 6:52 AM MST 5:58 PM MST
Astronomical Twilight 6:16 AM MST 6:34 PM MST
Moon 9:54 AM MST (12/15) 8:01 PM MST (12/15)
Length of Visible Light 9h 49m
Length of Day
8h 40m
Waxing Crescent, 9% of the Moon is Illuminated
Dec 15
Waxing Crescent
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Hourly Weather History & Observations

Time (MST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:33 AM 10.4 °F - 8.6 °F 92% 29.74 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
12:53 AM 8.1 °F -0.5 °F 6.1 °F 92% 29.94 in 7.0 mi South 4.6 mph - N/A   Mostly Cloudy
1:53 AM 12.9 °F 3.8 °F 10.0 °F 88% 29.93 in 8.0 mi SE 5.8 mph - N/A   Overcast
2:53 AM 16.0 °F - 14.0 °F 92% 29.91 in 7.0 mi Calm Calm - N/A   Overcast
3:53 AM 15.1 °F 9.4 °F 12.9 °F 91% 29.92 in 4.0 mi WNW 3.5 mph - N/A   Overcast
4:28 AM 17.6 °F - 15.8 °F 93% 29.76 in 2.5 mi Calm Calm - N/A   Overcast
4:53 AM 16.0 °F - 14.0 °F 92% 29.92 in 5.0 mi Calm Calm - N/A   Overcast
5:53 AM 16.0 °F - 12.9 °F 88% 29.94 in 8.0 mi Calm Calm - N/A   Overcast
6:32 AM 17.6 °F - 14.0 °F 86% 29.77 in 7.0 mi Calm Calm - N/A   Overcast
6:53 AM 15.1 °F 7.7 °F 12.0 °F 88% 29.95 in 4.0 mi SE 4.6 mph - N/A   Overcast
6:57 AM 15.8 °F 10.2 °F 12.2 °F 86% 29.77 in 1.8 mi SE 3.5 mph - N/A   Overcast
7:08 AM 14.0 °F 5.1 °F 12.2 °F 93% 29.77 in 2.0 mi South 5.8 mph - N/A   Overcast
7:11 AM 12.2 °F 2.9 °F 10.4 °F 92% 29.77 in 3.0 mi South 5.8 mph - N/A   Overcast
7:53 AM 15.1 °F - 12.0 °F 88% 29.94 in 9.0 mi Calm Calm - N/A   Overcast
8:53 AM 17.1 °F - 14.0 °F 88% 29.94 in 6.0 mi Calm Calm - N/A   Overcast
9:24 AM 15.8 °F - 14.0 °F 93% 29.76 in 1.0 mi Calm Calm - N/A   Overcast
9:31 AM 17.6 °F - 15.8 °F 93% 29.76 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
9:53 AM 17.1 °F - 16.0 °F 96% 29.94 in 0.2 mi Calm Calm - N/A Fog Light Freezing Fog
10:26 AM 19.4 °F - 17.6 °F 93% 29.76 in 1.5 mi Calm Calm - N/A   Overcast
10:40 AM 19.4 °F - 17.6 °F 93% 29.76 in 3.0 mi Calm Calm - N/A   Overcast
10:48 AM 19.4 °F - 15.8 °F 86% 29.75 in 2.0 mi Calm Calm - N/A   Overcast
10:53 AM 18.0 °F - 16.0 °F 92% 29.96 in 2.5 mi Calm Calm - N/A   Overcast
11:02 AM 17.6 °F - 15.8 °F 93% 29.75 in 3.0 mi Calm Calm - N/A   Overcast
11:53 AM 19.0 °F - 17.1 °F 92% 29.92 in 3.0 mi Calm Calm - N/A   Overcast
12:44 PM 19.4 °F - 17.6 °F 93% 29.71 in 4.0 mi Calm Calm - N/A   Overcast
12:53 PM 19.9 °F - 17.1 °F 89% 29.91 in 4.0 mi Calm Calm - N/A   Overcast
1:53 PM 19.9 °F - 18.0 °F 92% 29.87 in 5.0 mi Calm Calm - N/A   Overcast
2:53 PM 21.9 °F 17.2 °F 18.0 °F 85% 29.84 in 6.0 mi SE 3.5 mph - N/A   Overcast
3:53 PM 21.0 °F 14.6 °F 17.1 °F 85% 29.84 in 7.0 mi SSE 4.6 mph - N/A   Overcast
4:53 PM 19.9 °F - 17.1 °F 89% 29.83 in 5.0 mi Calm Calm - N/A   Overcast
5:53 PM 19.0 °F 13.9 °F 16.0 °F 88% 29.82 in 6.0 mi SSW 3.5 mph - N/A   Overcast
6:53 PM 17.1 °F 11.7 °F 14.0 °F 88% 29.82 in 6.0 mi SE 3.5 mph - N/A   Overcast
7:53 PM 10.9 °F 2.9 °F 8.1 °F 88% 29.83 in 9.0 mi South 4.6 mph - N/A   Mostly Cloudy
8:53 PM 7.0 °F 0.1 °F 3.9 °F 87% 29.83 in 10.0 mi South 3.5 mph - N/A   Clear
9:53 PM 7.0 °F - 3.0 °F 84% 29.82 in 10.0 mi Calm Calm - N/A   Clear
10:53 PM 7.0 °F - 3.0 °F 84% 29.80 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 10.0 °F 1.8 °F 6.1 °F 84% 29.78 in 10.0 mi SE 4.6 mph - N/A   Clear