DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 22 JANUARY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-1.9 ^°C	2.2 ^°C	-7.1 ^°C	12.2 ^°C (2002)	(2015)
Dewpoint	-8.2 ^°C	-4.9 ^°C	-11.8 ^°C	8.9 ^°C (1999)	-22.2 ^°C (2009)
Humidity	65.7 ^%	83.1 ^%	48.3 ^%		27 ^% (2009)
Barometer	1021.7 ^hPa	1026.1 ^hPa	1017.3 ^hPa	1040 ^hPa (2006)	1003 ^hPa (2005)
Wind Speed	11.1 ^km/h	21.7 ^km/h		38.9 ^km/h (2013)
Wind Gust		40.4 ^km/h		51.8 ^km/h (2013)
Precipitation	5.84 ^mm			16.51 ^mm (2016)

Weather Element	Average
Visibility	13.7 ^km
Wind Direction	SSW (203.2 °)

Weather Element	Total
Heating Degree Days	20.8 (Base 18.3)

Total Years on Record: 22

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