YELLOWSTONE NATIONAL PARK, WYOMING

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Elevation: 7938 feet Latitude: 44 34N Longitude: 110 24W

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DAILY WEATHER AVERAGE - SEPTEMBER 17

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	44 ^°F	56.7 ^°F	33 ^°F	73 ^°F (2009)	24.1 ^°F (2003)
Dewpoint	33 ^°F	39 ^°F	27.4 ^°F	51.1 ^°F (1998)	15.1 ^°F (2008)
Humidity	69.6 ^%	90.5 ^%	41 ^%		17 ^% (2008)
Barometer	30.06 ⁱⁿ	30.16 ⁱⁿ	29.97 ⁱⁿ	30.33 ⁱⁿ (2003)	29.71 ⁱⁿ (2013)
Wind Speed	3 ^mph	8.5 ^mph		15 ^mph (2011)
Wind Gust		20.2 ^mph		24.2 ^mph (2006)
Precipitation	0.37 ⁱⁿ			0.76 ⁱⁿ (2005)

Weather Element	Average
Visibility	6 ^mi
Wind Direction	ESE (102.2 °)

Weather Element	Total
Heating Degree Days	20.2 (Base 18.3)
Growing Degree Days	2.3 (Base 10)

Total Years on Record: 20

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