DULLES, VIRGINIA

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

WEATHER

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DAILY WEATHER AVERAGE - 27 JANUARY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	0.6 ^°C	5.4 ^°C	-4.4 ^°C	19.4 ^°C (2002)	-12.8 ^°C (2003)
Dewpoint	-6.4 ^°C	-2.1 ^°C	-10.4 ^°C	15 ^°C (2012)	-21.1 ^°C (2006)
Humidity	63 ^%	80.4 ^%	44.8 ^%		22 ^% (2006)
Barometer	1020.3 ^hPa	1026.1 ^hPa	1014.9 ^hPa	1040 ^hPa (2005)	998 ^hPa (2012)
Wind Speed	13.8 ^km/h	26.6 ^km/h		48.1 ^km/h (2012)
Wind Gust		48.4 ^km/h		61.2 ^km/h (2012)
Precipitation	6.6 ^mm			16.76 ^mm (2009)

Weather Element	Average
Visibility	15.3 ^km
Wind Direction	SW (230.6 °)

Weather Element	Total
Heating Degree Days	17.8 (Base 18.3)
Growing Degree Days	1.4 (Base 10)

Total Years on Record: 22

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