DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 4 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	22.9 ^°C	28.8 ^°C	17.5 ^°C	33.3 ^°C (2008)	10 ^°C (1997)
Dewpoint	15.9 ^°C	18.4 ^°C	12.6 ^°C	23 ^°C (1999)	2.8 ^°C (1998)
Humidity	68.8 ^%	91.1 ^%	44.1 ^%		22 ^% (1998)
Barometer	1016.3 ^hPa	1018.3 ^hPa	1014.6 ^hPa	1024.7 ^hPa (2005)	1005.4 ^hPa (2010)
Wind Speed	9 ^km/h	20.8 ^km/h		38.9 ^km/h (1997)
Wind Gust		35.2 ^km/h		48.1 ^km/h (2010)
Precipitation	16.51 ^mm			44.7 ^mm (1999)

Weather Element	Average
Visibility	14.5 ^km
Wind Direction	SSW (194.6 °)

Total Years on Record: 20

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