DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 19 JANUARY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	0.4 ^°C	5.1 ^°C	-4.6 ^°C	16.1 ^°C (1996)	-16.1 ^°C (1997)
Dewpoint	-5.8 ^°C	-2.8 ^°C	-9.6 ^°C	15.6 ^°C (1996)	-21.1 ^°C (1999)
Humidity	66.8 ^%	85.1 ^%	47 ^%		23 ^% (1999)
Barometer	1015.9 ^hPa	1020.7 ^hPa	1011.5 ^hPa	1034.9 ^hPa (2005)	995.3 ^hPa (1996)
Wind Speed	12.2 ^km/h	25.4 ^km/h		44.4 ^km/h (2007)
Wind Gust		43.3 ^km/h		64.9 ^km/h (1996)
Precipitation	10.67 ^mm			39.37 ^mm (2001)

Weather Element	Average
Visibility	13.5 ^km
Wind Direction	SSW (210.6 °)

Weather Element	Total
Heating Degree Days	18.1 (Base 18.3)

Total Years on Record: 22

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