DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 17 MAY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	17.2 ^°C	22.1 ^°C	12.6 ^°C	29.4 ^°C (1998)	7.8 ^°C (1999)
Dewpoint	11.3 ^°C	14.9 ^°C	8 ^°C	21.1 ^°C (1995)	-0.6 ^°C (2012)
Humidity	71.2 ^%	91.7 ^%	50.1 ^%		28 ^% (2012)
Barometer	1016.3 ^hPa	1018.6 ^hPa	1013.2 ^hPa	1028.1 ^hPa (2004)	1000.7 ^hPa (2008)
Wind Speed	10.3 ^km/h	20.9 ^km/h		35.2 ^km/h (2009)
Wind Gust		39.6 ^km/h		50.1 ^km/h (2009)
Precipitation	10.16 ^mm			46.48 ^mm (2011)

Weather Element	Average
Visibility	13.5 ^km
Wind Direction	S (181.5 °)

Total Years on Record: 21

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