Weather History for Yellowstone, WY

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Friday, September 20, 2013

  Actual Average Record
Temperature  
Mean Temperature 44 °F 45 °F  
Max Temperature 62 °F 60 °F 69 °F (2012)
Min Temperature 26 °F 30 °F 20 °F (2000)
Degree Days  
Heating Degree Days 21 20  
Month to date heating degree days 269 328  
Since 1 July heating degree days 693 915  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 30 °F    
Average Humidity 61    
Maximum Humidity 100    
Minimum Humidity 22    
Precipitation  
Precipitation 0.00 in 0.05 in 0.13 in (2004)
Month to date precipitation 2.53 0.97  
Year to date precipitation 14.70 15.04  
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 2 mph (WNW)    
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

Sep. 20, 2013 Rise Set
Actual Time 7:06 AM MDT 7:22 PM MDT
Civil Twilight 6:37 AM MDT 7:51 PM MDT
Nautical Twilight 6:03 AM MDT 8:25 PM MDT
Astronomical Twilight 5:28 AM MDT 9:00 PM MDT
Moon 7:52 PM MDT (9/20) 8:30 AM MDT (9/20)
Length of Visible Light 13h 13m
Length of Day
12h 15m
Full, 98% of the Moon is Illuminated
Sep 20
Full
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full

Hourly Weather History & Observations

Time (MDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 28.9 °F - 28.0 °F 96% 30.27 in - Calm Calm - N/A   Unknown
1:56 AM 28.0 °F - 27.0 °F 96% 30.26 in - Calm Calm - N/A   Unknown
2:56 AM 28.0 °F - 26.1 °F 92% 30.24 in - Calm Calm - N/A   Unknown
3:56 AM 27.0 °F - 26.1 °F 96% 30.25 in - Calm Calm - N/A   Unknown
4:56 AM 27.0 °F - 26.1 °F 96% 30.23 in - Calm Calm - N/A   Unknown
5:56 AM 27.0 °F - 25.0 °F 92% 30.23 in - Calm Calm - N/A   Unknown
6:56 AM 26.1 °F - 25.0 °F 96% 30.26 in - Calm Calm - N/A   Unknown
7:56 AM 28.0 °F - 27.0 °F 96% 30.28 in - Calm Calm - N/A   Unknown
8:56 AM 36.0 °F - 34.0 °F 93% 30.25 in - Calm Calm - N/A   Unknown
9:56 AM 43.0 °F - 37.0 °F 80% 30.22 in - Calm Calm - N/A   Unknown
10:56 AM 48.0 °F - 33.1 °F 56% 30.19 in - Variable 3.5 mph - N/A   Unknown
11:56 AM 51.1 °F - 34.0 °F 52% 30.16 in - Variable 3.5 mph - N/A   Unknown
12:56 PM 54.0 °F - 30.9 °F 41% 30.13 in - Variable 3.5 mph - N/A   Unknown
1:56 PM 55.9 °F - 32.0 °F 40% 30.10 in - ESE 5.8 mph - N/A   Unknown
2:56 PM 55.9 °F - 30.9 °F 39% 30.09 in - Variable 3.5 mph - N/A   Unknown
3:56 PM 60.1 °F - 34.0 °F 38% 30.04 in - Calm Calm - N/A   Unknown
4:56 PM 61.0 °F - 21.0 °F 21% 30.03 in - Variable 3.5 mph - N/A   Unknown
5:56 PM 60.1 °F - 24.1 °F 25% 30.02 in - Calm Calm - N/A   Unknown
6:56 PM 48.0 °F - 37.9 °F 68% 30.08 in - Calm Calm - N/A   Unknown
7:56 PM 41.0 °F 39.0 °F 35.1 °F 79% 30.10 in - WNW 3.5 mph - N/A   Unknown
8:56 PM 39.0 °F 35.7 °F 32.0 °F 76% 30.06 in - NW 4.6 mph - N/A   Unknown
9:56 PM 35.1 °F 32.2 °F 30.9 °F 85% 30.06 in - NW 3.5 mph - N/A   Unknown
10:56 PM 33.1 °F 30.0 °F 30.9 °F 92% 30.03 in - NW 3.5 mph - N/A   Unknown
11:56 PM 32.0 °F 28.7 °F 30.9 °F 96% 30.02 in - WNW 3.5 mph - N/A   Unknown