DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 18 MAY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	17.2 ^°C	22.3 ^°C	10.3 ^°C	31.1 ^°C (1996)	(2015)
Dewpoint	11.6 ^°C	14.6 ^°C	8.4 ^°C	22 ^°C (2015)	-4.4 ^°C (2009)
Humidity	72.8 ^%	93.6 ^%	51 ^%		23 ^% (2009)
Barometer	1015.6 ^hPa	1018.3 ^hPa	1012.9 ^hPa	1028.4 ^hPa (2009)	994.6 ^hPa (2008)
Wind Speed	10.6 ^km/h	20.9 ^km/h		35.2 ^km/h (2002)
Wind Gust		42.6 ^km/h		88.8 ^km/h (1995)
Precipitation	12.95 ^mm			61.72 ^mm (2011)

Weather Element	Average
Visibility	13.2 ^km
Wind Direction	SSE (168.6 °)

Total Years on Record: 21

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