DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 29 JANUARY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	0.6 ^°C	5.2 ^°C	-5 ^°C	22.2 ^°C (2002)	-15.6 ^°C (2004)
Dewpoint	-6.3 ^°C	-2.6 ^°C	-9.8 ^°C	10.6 ^°C (2013)	-22.2 ^°C (2012)
Humidity	62.9 ^%	84 ^%	43.1 ^%		23 ^% (2012)
Barometer	1020.7 ^hPa	1024.7 ^hPa	1016.3 ^hPa	1040 ^hPa (2005)	1001.4 ^hPa (2008)
Wind Speed	11.1 ^km/h	24 ^km/h		55.5 ^km/h (2016)
Wind Gust		48.6 ^km/h		79.7 ^km/h (2012)
Precipitation	2.29 ^mm			5.33 ^mm (2008)

Weather Element	Average
Visibility	16.3 ^km
Wind Direction	SSW (203.8 °)

Weather Element	Total
Heating Degree Days	18.2 (Base 18.3)
Growing Degree Days	2.2 (Base 10)

Total Years on Record: 22

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