DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 30 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	16.3 ^°C	22.3 ^°C	10.8 ^°C	29.4 ^°C (1998)	5 ^°C (2005)
Dewpoint	11.3 ^°C	13.9 ^°C	8.4 ^°C	23 ^°C (2010)	1.1 ^°C (2005)
Humidity	75 ^%	93.9 ^%	49.7 ^%		29 ^% (2005)
Barometer	1016.9 ^hPa	1020 ^hPa	1014.2 ^hPa	1033.2 ^hPa (2007)	998.6 ^hPa (2010)
Wind Speed	8.9 ^km/h	20.8 ^km/h		38.9 ^km/h (1999)
Wind Gust		42 ^km/h		57.5 ^km/h (1999)
Precipitation	44.7 ^mm			243.33 ^mm (2010)

Weather Element	Average
Visibility	14 ^km
Wind Direction	SSW (187.5 °)

Total Years on Record: 20

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