Weather History for Yellowstone, WY

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Thursday, December 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 7 °F 13 °F  
Max Temperature 18 °F 23 °F 33 °F (2001)
Min Temperature -4 °F 3 °F -28 °F (1998)
Degree Days  
Heating Degree Days 58 52  
Month to date heating degree days 964 1017  
Since 1 July heating degree days 4061 4337  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1 0  
Moisture  
Dew Point -1 °F    
Average Humidity 68    
Maximum Humidity 87    
Minimum Humidity 49    
Precipitation  
Precipitation 0.00 in 0.04 in 0.35 in (2007)
Month to date precipitation 2.95 0.91  
Year to date precipitation 23.31 19.71  
Sea Level Pressure  
Sea Level Pressure 30.48 in    
Wind  
Wind Speed 1 mph (NW)    
Max Wind Speed 7 mph    
Max Gust Speed 13 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. 20, 2012 Rise Set
Actual Time 7:54 AM MST 4:44 PM MST
Civil Twilight 7:21 AM MST 5:17 PM MST
Nautical Twilight 6:44 AM MST 5:54 PM MST
Astronomical Twilight 6:08 AM MST 6:30 PM MST
Moon 12:15 PM MST (12/20) 12:32 AM MST (12/20)
Length of Visible Light 9h 56m
Length of Day
8h 49m
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
12:56 AM 7.0 °F 0.1 °F 1.9 °F 80% 30.45 in - Variable 3.5 mph - N/A   Unknown
1:56 AM 7.0 °F 0.1 °F 1.9 °F 80% 30.44 in - Variable 3.5 mph - N/A   Unknown
2:56 AM 7.0 °F 0.1 °F 1.9 °F 80% 30.46 in - Variable 3.5 mph - N/A   Unknown
3:56 AM 6.1 °F - 1.0 °F 80% 30.48 in - Calm Calm - N/A   Unknown
4:56 AM 5.0 °F - -0.0 °F 80% 30.51 in - Calm Calm - N/A   Unknown
5:56 AM 3.9 °F - -0.9 °F 80% 30.54 in - Calm Calm - N/A   Unknown
6:56 AM -0.0 °F - -4.0 °F 83% 30.55 in - Calm Calm - N/A   Unknown
7:56 AM -2.9 °F - -7.1 °F 82% 30.58 in - Calm Calm - N/A   Unknown
8:56 AM 1.0 °F - -4.0 °F 79% 30.56 in - Calm Calm - N/A   Unknown
9:56 AM 7.0 °F - -0.0 °F 73% 30.53 in - Calm Calm - N/A   Unknown
10:56 AM 9.0 °F - 1.0 °F 70% 30.50 in - Calm Calm - N/A   Unknown
11:56 AM 10.9 °F - 1.0 °F 64% 30.47 in - Calm Calm - N/A   Unknown
12:56 PM 12.9 °F - 1.9 °F 62% 30.43 in - Calm Calm - N/A   Unknown
1:56 PM 16.0 °F - 3.0 °F 57% 30.38 in - Calm Calm - N/A   Unknown
2:56 PM 17.1 °F - 1.9 °F 52% 30.38 in - Calm Calm - N/A   Unknown
3:56 PM 16.0 °F - 3.0 °F 57% 30.38 in - Calm Calm - N/A   Unknown
4:56 PM 9.0 °F - 3.9 °F 80% 30.43 in - Calm Calm - N/A   Unknown
5:56 PM 6.1 °F -0.9 °F 1.0 °F 80% 30.46 in - NW 3.5 mph - N/A   Unknown
6:56 PM 3.0 °F -4.4 °F -0.9 °F 84% 30.50 in - WNW 3.5 mph - N/A   Unknown
7:56 PM 1.0 °F -8.7 °F -2.9 °F 83% 30.53 in - NW 4.6 mph - N/A   Unknown
8:56 PM -0.0 °F - -4.0 °F 83% 30.50 in - Calm Calm - N/A   Unknown
9:56 PM -0.0 °F -7.9 °F -4.0 °F 83% 30.46 in - NW 3.5 mph - N/A   Unknown
10:56 PM -0.9 °F -8.9 °F -5.1 °F 83% 30.47 in - NW 3.5 mph - N/A   Unknown
11:56 PM -2.0 °F - -7.1 °F 79% 30.44 in - Calm Calm - N/A   Unknown