DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 4 MAY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	16.1 ^°C	22.1 ^°C	10.2 ^°C	31.7 ^°C (2001)	1.7 ^°C (2002)
Dewpoint	8.4 ^°C	12 ^°C	5 ^°C	19 ^°C (2012)	-3.3 ^°C (2006)
Humidity	64.3 ^%	89 ^%	40.5 ^%		23 ^% (2006)
Barometer	1017.6 ^hPa	1020.3 ^hPa	1014.9 ^hPa	1031.2 ^hPa (2005)	1006.1 ^hPa (2014)
Wind Speed	10.9 ^km/h	22.4 ^km/h		38.9 ^km/h (2014)
Wind Gust		40.1 ^km/h		55.5 ^km/h (2014)
Precipitation	12.19 ^mm			50.55 ^mm (2009)

Weather Element	Average
Visibility	14.5 ^km
Wind Direction	SSW (186.7 °)

Total Years on Record: 21

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