YELLOWSTONE NATIONAL PARK, WYOMING

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Elevation: 2420 meters Latitude: 44 34N Longitude: 110 24W

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DAILY WEATHER AVERAGE - 18 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-11.2 ^°C	-6.2 ^°C	-16.8 ^°C	1.1 ^°C (2013)	-29.4 ^°C (2005)
Dewpoint	-13.9 ^°C	-9.7 ^°C	-19.1 ^°C	-3.8 ^°C (1997)	-32.8 ^°C (2008)
Humidity	81.1 ^%	91.1 ^%	69 ^%		44 ^% (2008)
Barometer	1024.4 ^hPa	1029.1 ^hPa	1019 ^hPa	1044 ^hPa (2003)	1003.4 ^hPa (1999)
Wind Speed	4 ^km/h	10.5 ^km/h		22.2 ^km/h (1999)
Wind Gust		30.6 ^km/h		35.2 ^km/h (1999)
Precipitation	4.57 ^mm			16.26 ^mm (1999)

Weather Element	Average
Visibility	9.7 ^km
Wind Direction	ESE (97.1 °)

Weather Element	Total
Heating Degree Days	29.8 (Base 18.3)

Total Years on Record: 21

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