DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 20 NOVEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	7.4 ^°C	13.6 ^°C	2.1 ^°C	21.7 ^°C (1999)	-4.4 ^°C (1995)
Dewpoint	1.3 ^°C	4.8 ^°C	-2.1 ^°C	12.2 ^°C (2011)	-10.6 ^°C (2015)
Humidity	68.5 ^%	90 ^%	45.2 ^%		20 ^% (2005)
Barometer	1020 ^hPa	1023 ^hPa	1016.6 ^hPa	1035.2 ^hPa (2013)	1004.7 ^hPa (2003)
Wind Speed	10 ^km/h	22.7 ^km/h		37 ^km/h (2015)
Wind Gust		41.7 ^km/h		57.5 ^km/h (2000)
Precipitation	1.27 ^mm			3.56 ^mm (2004)

Weather Element	Average
Visibility	14.6 ^km
Wind Direction	SW (223.5 °)

Weather Element	Total
Heating Degree Days	10.6 (Base 18.3)
Growing Degree Days	2.4 (Base 10)

Total Years on Record: 20

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