Weather History for Lewistown, MT

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Friday, December 21, 2012

  Actual Average Record
Temperature  
Mean Temperature 31 °F 22 °F  
Max Temperature 44 °F 33 °F 60 °F (1900)
Min Temperature 18 °F 12 °F -35 °F (1989)
Degree Days  
Heating Degree Days 34 43  
Month to date heating degree days 768 868  
Since 1 July heating degree days 2681 2996  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 314 210  
Moisture  
Dew Point 15 °F    
Average Humidity 46    
Maximum Humidity 58    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in 0.02 in 0.64 in (1966)
Month to date precipitation 0.30 0.44  
Year to date precipitation 15.30 16.63  
Snow  
Snow 0.00 in - - ()
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 29.94 in    
Wind  
Wind Speed 8 mph (SSW)    
Max Wind Speed 20 mph    
Max Gust Speed 22 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 21, 2012 Rise Set
Actual Time 8:01 AM MST 4:31 PM MST
Civil Twilight 7:25 AM MST 5:06 PM MST
Nautical Twilight 6:46 AM MST 5:45 PM MST
Astronomical Twilight 6:09 AM MST 6:23 PM MST
Moon 12:34 PM MST (12/21) 1:34 AM MST (12/21)
Length of Visible Light 9h 41m
Length of Day
8h 30m
Waxing Gibbous, 65% of the Moon is Illuminated
Dec 21
Waxing Gibbous
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
12:54 AM 35.1 °F 26.9 °F 15.1 °F 44% 29.92 in 10.0 mi WSW 11.5 mph - N/A   Clear
1:54 AM 36.0 °F 26.0 °F 15.1 °F 43% 29.92 in 10.0 mi SW 17.3 mph - N/A   Clear
2:54 AM 37.0 °F 28.5 °F 14.0 °F 39% 29.94 in 10.0 mi SW 13.8 mph - N/A   Clear
3:54 AM 37.0 °F 28.1 °F 14.0 °F 39% 29.93 in 10.0 mi SW 15.0 mph - N/A   Clear
4:54 AM 36.0 °F 27.1 °F 15.1 °F 43% 29.94 in 10.0 mi SW 13.8 mph - N/A   Clear
5:54 AM 35.1 °F 25.2 °F 15.1 °F 44% 29.94 in 10.0 mi SW 16.1 mph - N/A   Clear
6:54 AM 30.9 °F 25.2 °F 15.1 °F 52% 29.96 in 10.0 mi SSW 5.8 mph - N/A   Clear
7:54 AM 37.0 °F 32.4 °F 12.0 °F 36% 29.93 in 10.0 mi South 5.8 mph - N/A   Clear
8:54 AM 33.1 °F - 12.9 °F 43% 29.96 in 10.0 mi Calm Calm - N/A   Clear
9:54 AM 39.0 °F 31.0 °F 14.0 °F 36% 29.94 in 10.0 mi SW 13.8 mph - N/A   Clear
10:54 AM 42.1 °F 35.2 °F 15.1 °F 34% 29.94 in 10.0 mi SW 12.7 mph - N/A   Clear
11:54 AM 42.1 °F 36.1 °F 17.1 °F 37% 29.93 in 10.0 mi SW 10.4 mph - N/A   Clear
12:54 PM 43.0 °F - 17.1 °F 35% 29.91 in 10.0 mi Calm Calm - N/A   Clear
1:54 PM 44.1 °F - 17.1 °F 34% 29.91 in 10.0 mi Calm Calm - N/A   Clear
2:54 PM 43.0 °F - 15.1 °F 32% 29.90 in 10.0 mi Calm Calm - N/A   Clear
3:54 PM 37.9 °F - 16.0 °F 41% 29.93 in 10.0 mi Calm Calm - N/A   Clear
4:54 PM 35.1 °F 30.1 °F 15.1 °F 44% 29.94 in 10.0 mi SE 5.8 mph - N/A   Partly Cloudy
5:54 PM 35.1 °F 29.3 °F 14.0 °F 42% 29.95 in 10.0 mi South 6.9 mph - N/A   Clear
6:54 PM 32.0 °F 25.6 °F 16.0 °F 52% 29.97 in 10.0 mi ESE 6.9 mph - N/A   Clear
7:54 PM 34.0 °F 25.0 °F 16.0 °F 48% 29.96 in 10.0 mi ESE 12.7 mph - N/A   Overcast
8:54 PM 33.1 °F 24.9 °F 17.1 °F 52% 29.98 in 10.0 mi East 10.4 mph - N/A   Overcast
9:54 PM 30.9 °F 22.8 °F 15.1 °F 52% 29.97 in 10.0 mi SE 9.2 mph - N/A   Mostly Cloudy
10:54 PM 28.9 °F 25.2 °F 15.1 °F 56% 29.99 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
11:54 PM 19.0 °F 13.9 °F 15.1 °F 85% 30.00 in 10.0 mi SW 3.5 mph - N/A   Mostly Cloudy