DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 1 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	22.8 ^°C	28.5 ^°C	17.4 ^°C	35 ^°C (2010)	12.2 ^°C (2009)
Dewpoint	16.2 ^°C	18.3 ^°C	13.7 ^°C	23.3 ^°C (2000)	6.7 ^°C (2007)
Humidity	70.2 ^%	92.6 ^%	44.8 ^%		27 ^% (2007)
Barometer	1017.9 ^hPa	1020 ^hPa	1015.9 ^hPa	1029.1 ^hPa (2002)	1007.8 ^hPa (2013)
Wind Speed	9.3 ^km/h	19.3 ^km/h		38.9 ^km/h (2006)
Wind Gust		38.1 ^km/h		55.5 ^km/h (2006)
Precipitation	34.54 ^mm			121.67 ^mm (2006)

Weather Element	Average
Visibility	13.8 ^km
Wind Direction	SSE (172.8 °)

Total Years on Record: 20

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