Weather History for Butte, MT

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Thursday, December 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 16 °F 17 °F  
Max Temperature 29 °F 29 °F 49 °F (1958)
Min Temperature 3 °F 5 °F -36 °F (1998)
Degree Days  
Heating Degree Days 49 48  
Month to date heating degree days 857 945  
Since 1 July heating degree days 3119 3435  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 121 81  
Moisture  
Dew Point 4 °F    
Average Humidity 63    
Maximum Humidity 80    
Minimum Humidity 46    
Precipitation  
Precipitation 0.00 in 0.02 in 0.25 in (1941)
Month to date precipitation 0.24 0.33  
Year to date precipitation 9.00 12.59  
Sea Level Pressure  
Sea Level Pressure 30.24 in    
Wind  
Wind Speed 5 mph (SSW)    
Max Wind Speed 20 mph    
Max Gust Speed 26 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 20, 2012 Rise Set
Actual Time 8:08 AM MST 4:47 PM MST
Civil Twilight 7:33 AM MST 5:21 PM MST
Nautical Twilight 6:55 AM MST 5:59 PM MST
Astronomical Twilight 6:19 AM MST 6:36 PM MST
Moon 12:22 PM MST (12/20) 12:42 AM MST (12/20)
Length of Visible Light 9h 48m
Length of Day
8h 38m
First Quarter, 56% of the Moon is Illuminated
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

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 6.1 °F -2.8 °F -2.0 °F 69% 30.31 in 10.0 mi Variable 4.6 mph - N/A   Clear
1:53 AM 9.0 °F - -0.9 °F 64% 30.28 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM 9.0 °F 0.6 °F -0.9 °F 64% 30.27 in 10.0 mi Variable 4.6 mph - N/A   Clear
3:53 AM 10.0 °F - -0.0 °F 64% 30.28 in 10.0 mi Calm Calm - N/A   Clear
4:53 AM 12.9 °F 5.2 °F 1.0 °F 59% 30.27 in 10.0 mi NNE 4.6 mph - N/A   Clear
5:53 AM 12.0 °F 1.5 °F 1.0 °F 61% 30.30 in 10.0 mi North 6.9 mph - N/A   Clear
6:53 AM 12.0 °F 4.1 °F 1.9 °F 64% 30.31 in 10.0 mi WNW 4.6 mph - N/A   Clear
7:53 AM 6.1 °F -0.9 °F -0.9 °F 73% 30.35 in 10.0 mi Variable 3.5 mph - N/A   Clear
8:53 AM 9.0 °F - 1.0 °F 70% 30.32 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 21.9 °F 15.7 °F 6.1 °F 51% 30.26 in 10.0 mi Variable 4.6 mph - N/A   Clear
10:53 AM 24.1 °F 17.0 °F 7.0 °F 48% 30.23 in 10.0 mi Variable 5.8 mph - N/A   Clear
11:53 AM 25.0 °F 14.8 °F 8.1 °F 49% 30.22 in 10.0 mi SSW 10.4 mph 19.6 mph N/A   Partly Cloudy
12:53 PM 26.1 °F 14.0 °F 9.0 °F 49% 30.23 in 10.0 mi SSW 15.0 mph - N/A   Mostly Cloudy
1:53 PM 28.0 °F 18.6 °F 10.0 °F 47% 30.18 in 10.0 mi SSW 10.4 mph - N/A   Partly Cloudy
2:53 PM 27.0 °F 15.6 °F 9.0 °F 47% 30.17 in 10.0 mi SSW 13.8 mph - N/A   Clear
3:53 PM 27.0 °F 23.0 °F 8.1 °F 45% 30.16 in 10.0 mi SW 3.5 mph - N/A   Clear
4:53 PM 24.1 °F 18.2 °F 7.0 °F 48% 30.15 in 10.0 mi East 4.6 mph - N/A   Clear
5:53 PM 23.0 °F 17.0 °F 8.1 °F 53% 30.17 in 10.0 mi West 4.6 mph - N/A   Clear
6:53 PM 15.1 °F 5.2 °F 5.0 °F 64% 30.19 in 10.0 mi South 6.9 mph - N/A   Clear
7:53 PM 12.0 °F - 3.0 °F 67% 30.25 in 10.0 mi Calm Calm - N/A   Clear
8:53 PM 10.0 °F 0.4 °F 3.0 °F 73% 30.24 in 10.0 mi South 5.8 mph - N/A   Clear
9:53 PM 10.9 °F 4.7 °F 3.9 °F 73% 30.17 in 10.0 mi SW 3.5 mph - N/A   Partly Cloudy
10:53 PM 9.0 °F - 3.0 °F 77% 30.17 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 7.0 °F 0.1 °F 1.9 °F 80% 30.18 in 10.0 mi SSE 3.5 mph - N/A   Clear