Weather History for Butte, MT

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Tuesday, December 18, 2012

  Actual Average Record
Temperature  
Mean Temperature 9 °F 17 °F  
Max Temperature 21 °F 29 °F 55 °F (1979)
Min Temperature -3 °F 4 °F -32 °F (1924)
Degree Days  
Heating Degree Days 56 48  
Month to date heating degree days 749 849  
Since 1 July heating degree days 3011 3339  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 121 81  
Moisture  
Dew Point 2 °F    
Average Humidity 64    
Maximum Humidity 83    
Minimum Humidity 45    
Precipitation  
Precipitation 0.00 in 0.02 in 0.24 in (1925)
Month to date precipitation 0.24 0.30  
Year to date precipitation 9.00 12.56  
Sea Level Pressure  
Sea Level Pressure 29.90 in    
Wind  
Wind Speed 5 mph (WSW)    
Max Wind Speed 17 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 18, 2012 Rise Set
Actual Time 8:07 AM MST 4:46 PM MST
Civil Twilight 7:32 AM MST 5:21 PM MST
Nautical Twilight 6:54 AM MST 5:59 PM MST
Astronomical Twilight 6:18 AM MST 6:35 PM MST
Moon 11:31 AM MST (12/18) 11:36 PM MST (12/18)
Length of Visible Light 9h 48m
Length of Day
8h 39m
Waxing Crescent, 35% of the Moon is Illuminated
Dec 18
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
12:53 AM 21.0 °F 8.1 °F 7.0 °F 55% 29.70 in 10.0 mi WSW 13.8 mph 21.9 mph N/A   Clear
1:53 AM 19.9 °F 9.3 °F 6.1 °F 55% 29.73 in 10.0 mi WSW 9.2 mph - N/A   Clear
2:53 AM 19.0 °F 9.0 °F 5.0 °F 54% 29.76 in 10.0 mi WSW 8.1 mph - N/A   Clear
3:53 AM 18.0 °F 6.1 °F 3.9 °F 54% 29.78 in 10.0 mi WSW 10.4 mph 16.1 mph N/A   Partly Cloudy
4:53 AM 19.0 °F 8.2 °F 3.0 °F 50% 29.80 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
5:53 AM 17.1 °F - 3.9 °F 56% 29.82 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:53 AM 17.1 °F 7.6 °F 3.9 °F 56% 29.85 in 10.0 mi NNE 6.9 mph - N/A   Mostly Cloudy
7:53 AM 17.1 °F 5.8 °F 3.0 °F 54% 29.88 in 10.0 mi West 9.2 mph - N/A   Overcast
8:53 AM 16.0 °F - 3.9 °F 59% 29.91 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:53 AM 17.1 °F - 5.0 °F 59% 29.90 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 18.0 °F - 3.9 °F 54% 29.91 in 10.0 mi Calm Calm - N/A   Clear
11:53 AM 19.0 °F - 1.9 °F 47% 29.90 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
12:53 PM 19.9 °F - 1.9 °F 46% 29.87 in 10.0 mi Calm Calm - N/A   Overcast
1:53 PM 19.9 °F 10.1 °F 1.0 °F 44% 29.86 in 10.0 mi West 8.1 mph - N/A   Clear
2:53 PM 19.9 °F 6.2 °F 1.0 °F 44% 29.86 in 10.0 mi West 15.0 mph 21.9 mph N/A   Clear
3:53 PM 19.9 °F 7.9 °F 3.9 °F 50% 29.88 in 10.0 mi West 11.5 mph 17.3 mph N/A   Clear
4:53 PM 16.0 °F 10.4 °F 5.0 °F 62% 29.91 in 10.0 mi NNW 3.5 mph - N/A   Partly Cloudy
5:53 PM 10.9 °F - 3.0 °F 70% 29.96 in 10.0 mi Calm Calm - N/A   Clear
6:53 PM 5.0 °F -5.6 °F -0.9 °F 76% 30.01 in 10.0 mi SSW 5.8 mph - N/A   Partly Cloudy
7:53 PM 1.0 °F -10.3 °F -4.0 °F 79% 30.03 in 10.0 mi ESE 5.8 mph - N/A   Clear
8:53 PM 1.9 °F - -5.1 °F 72% 30.05 in 10.0 mi Calm Calm - N/A   Clear
9:53 PM -0.9 °F -8.9 °F -6.0 °F 79% 30.07 in 10.0 mi Variable 3.5 mph - N/A   Partly Cloudy
10:53 PM -0.9 °F - -7.1 °F 75% 30.07 in 10.0 mi Calm Calm - N/A   Overcast
11:53 PM -0.9 °F -12.7 °F -6.0 °F 79% 30.08 in 10.0 mi SSE 5.8 mph - N/A   Overcast