DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 31 OCTOBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	11.7 ^°C	18.6 ^°C	4.7 ^°C	26.7 ^°C (2004)	-2 ^°C (2011)
Dewpoint	4.7 ^°C	7.8 ^°C	0.9 ^°C	17.2 ^°C (2009)	-7.2 ^°C (2008)
Humidity	66.9 ^%	91.1 ^%	38.9 ^%		17 ^% (2008)
Barometer	1020.3 ^hPa	1023.7 ^hPa	1016.9 ^hPa	1034.9 ^hPa (2008)	1007.5 ^hPa (2004)
Wind Speed	8.7 ^km/h	19.5 ^km/h		33.3 ^km/h (2009)
Wind Gust		36.5 ^km/h		46.3 ^km/h (2009)
Precipitation	1.52 ^mm			2.79 ^mm (1997)

Weather Element	Average
Visibility	15.6 ^km
Wind Direction	SSW (192.7 °)

Total Years on Record: 20

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