DULLES, VIRGINIA

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Elevation: 290 feet Latitude: 38 57N Longitude: 077 27W

WEATHER

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DAILY WEATHER AVERAGE - FEBRUARY 21

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	40.1 ^°F	49.3 ^°F	30 ^°F	69.1 ^°F (1997)	10.9 ^°F (2015)
Dewpoint	28 ^°F	36.1 ^°F	20.9 ^°F	57.9 ^°F (1997)	-9 ^°F (2009)
Humidity	65.3 ^%	85.1 ^%	45.2 ^%		20 ^% (2009)
Barometer	30.03 ⁱⁿ	30.17 ⁱⁿ	29.90 ⁱⁿ	30.52 ⁱⁿ (2000)	29.48 ⁱⁿ (2004)
Wind Speed	8 ^mph	16 ^mph		27.6 ^mph (2014)
Wind Gust		27.6 ^mph		34.5 ^mph (2004)
Precipitation	0.49 ⁱⁿ			1.13 ⁱⁿ (2015)

Weather Element	Average
Visibility	8.9 ^mi
Wind Direction	SW (223.6 °)

Weather Element	Total
Heating Degree Days	25.4 (Base 18.3)
Growing Degree Days	2.8 (Base 10)

Total Years on Record: 22

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