DULLES, VIRGINIA

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

WEATHER

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DAILY WEATHER AVERAGE - 14 AUGUST

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	24.1 ^°C	30.1 ^°C	19.1 ^°C	36.1 ^°C (2002)	12.2 ^°C (2014)
Dewpoint	17.6 ^°C	19.6 ^°C	15.4 ^°C	25 ^°C (1995)	6.7 ^°C (2007)
Humidity	69.8 ^%	90.5 ^%	45.2 ^%		22 ^% (2007)
Barometer	1015.9 ^hPa	1017.9 ^hPa	1013.5 ^hPa	1028.1 ^hPa (2003)	1005.4 ^hPa (2011)
Wind Speed	8.9 ^km/h	20.3 ^km/h		46.3 ^km/h (1999)
Wind Gust		42 ^km/h		62.9 ^km/h (1999)
Precipitation	17.02 ^mm			75.18 ^mm (2008)

Weather Element	Average
Visibility	13.2 ^km
Wind Direction	S (180.5 °)

Weather Element	Total
Cooling Degree Days	6.3 (Base 18.3)
Growing Degree Days	14.6 (Base 10)

Total Years on Record: 20

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