DULLES, VIRGINIA

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Elevation: 88 meters Latitude: 38 57N Longitude: 077 27W

WEATHER

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DAILY WEATHER AVERAGE - 6 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	3.9 ^°C	8.1 ^°C	-0.7 ^°C	26.1 ^°C (1998)	-12.2 ^°C (2002)
Dewpoint	-1.6 ^°C	2 ^°C	-5.3 ^°C	17.2 ^°C (1998)	-15.6 ^°C (1995)
Humidity	70.2 ^%	87.1 ^%	51.6 ^%		23 ^% (1995)
Barometer	1019.3 ^hPa	1023 ^hPa	1014.9 ^hPa	1037.3 ^hPa (2015)	1005.4 ^hPa (1996)
Wind Speed	12.1 ^km/h	24.8 ^km/h		44.4 ^km/h (2010)
Wind Gust		38.1 ^km/h		61.2 ^km/h (2010)
Precipitation	16.26 ^mm			47.24 ^mm (2013)

Weather Element	Average
Visibility	15.1 ^km
Wind Direction	WSW (234 °)

Weather Element	Total
Heating Degree Days	15.3 (Base 18.3)
Growing Degree Days	4.2 (Base 10)

Total Years on Record: 21

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