Weather History for Yellowstone, WY

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Tuesday, December 18, 2012

  Actual Average Record
Temperature  
Mean Temperature 8 °F 13 °F  
Max Temperature 15 °F 23 °F 34 °F (2013)
Min Temperature 0 °F 3 °F -21 °F (2005)
Degree Days  
Heating Degree Days 57 52  
Month to date heating degree days 830 913  
Since 1 July heating degree days 3927 4233  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1 0  
Moisture  
Dew Point -2 °F    
Average Humidity 71    
Maximum Humidity 86    
Minimum Humidity 55    
Precipitation  
Precipitation 0.01 in 0.05 in 0.25 in (1999)
Month to date precipitation 2.95 0.82  
Year to date precipitation 23.31 19.62  
Sea Level Pressure  
Sea Level Pressure 29.89 in    
Wind  
Wind Speed 4 mph (WNW)    
Max Wind Speed 8 mph    
Max Gust Speed 17 mph    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Astronomy

Dec. 18, 2012 Rise Set
Actual Time 7:53 AM MST 4:43 PM MST
Civil Twilight 7:20 AM MST 5:16 PM MST
Nautical Twilight 6:43 AM MST 5:53 PM MST
Astronomical Twilight 6:07 AM MST 6:29 PM MST
Moon 11:22 AM MST (12/18) 11:27 PM MST (12/18)
Length of Visible Light 9h 56m
Length of Day
8h 49m
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
12:56 AM 12.0 °F - 6.1 °F 77% 29.71 in - Calm Calm - N/A   Unknown
1:56 AM 10.9 °F 4.7 °F 5.0 °F 77% 29.72 in - Variable 3.5 mph - N/A   Unknown
2:56 AM 10.9 °F - 6.1 °F 81% 29.75 in - Calm Calm - N/A   Unknown
3:56 AM 10.9 °F 1.4 °F 5.0 °F 77% 29.75 in - Variable 5.8 mph - N/A   Unknown
4:56 AM 10.0 °F 0.4 °F 3.9 °F 76% 29.78 in - Variable 5.8 mph - N/A   Unknown
5:56 AM 8.1 °F 1.4 °F 3.0 °F 80% 29.80 in - Variable 3.5 mph - N/A   Unknown
6:56 AM 3.0 °F - -0.0 °F 87% 29.86 in - Calm Calm - 0.01 in   Unknown
7:56 AM 3.0 °F - -2.0 °F 80% 29.86 in - Calm Calm - N/A   Unknown
8:56 AM 6.1 °F -2.8 °F 1.0 °F 80% 29.88 in - Variable 4.6 mph - N/A   Unknown
9:56 AM 10.0 °F -1.9 °F 1.9 °F 70% 29.86 in - West 8.1 mph - N/A   Unknown
10:56 AM 10.9 °F 1.4 °F 1.0 °F 64% 29.86 in - Variable 5.8 mph 17.3 mph N/A   Unknown
11:56 AM 12.0 °F 0.5 °F -0.0 °F 59% 29.85 in - West 8.1 mph - N/A   Unknown
12:56 PM 14.0 °F 3.9 °F -0.0 °F 54% 29.83 in - West 6.9 mph - N/A   Unknown
1:56 PM 12.9 °F 2.6 °F -0.9 °F 54% 29.84 in - Variable 6.9 mph - N/A   Unknown
2:56 PM 12.9 °F 2.6 °F -0.9 °F 54% 29.84 in - West 6.9 mph - N/A   Unknown
3:56 PM 10.9 °F 4.7 °F -0.9 °F 59% 29.86 in - Variable 3.5 mph - N/A   Unknown
4:56 PM 6.1 °F -2.8 °F -2.0 °F 69% 29.91 in - West 4.6 mph - N/A   Unknown
5:56 PM 1.9 °F -7.6 °F -4.0 °F 76% 29.96 in - NW 4.6 mph - N/A   Unknown
6:56 PM -0.9 °F -11.0 °F -6.0 °F 79% 30.02 in - WNW 4.6 mph - N/A   Unknown
7:56 PM -4.0 °F - -7.1 °F 87% 30.06 in - Calm Calm - N/A   Unknown
8:56 PM -8.0 °F - -11.9 °F 83% 30.07 in - Calm Calm - N/A   Unknown
9:56 PM -9.9 °F - -14.1 °F 82% 30.07 in - Calm Calm - N/A   Unknown
10:56 PM -13.0 °F -22.7 °F -18.0 °F 78% 30.09 in - NW 3.5 mph - N/A   Unknown
11:56 PM -13.0 °F - -18.0 °F 78% 30.10 in - Calm Calm - N/A   Unknown