DULLES, VIRGINIA

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

WEATHER

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DAILY WEATHER AVERAGE - 10 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	3.6 ^°C	8.2 ^°C	-1.6 ^°C	17.2 ^°C (2008)	-10 ^°C (1995)
Dewpoint	-1.1 ^°C	1.8 ^°C	-5.2 ^°C	15 ^°C (2008)	-19.4 ^°C (2006)
Humidity	74.7 ^%	88.7 ^%	56.8 ^%		25 ^% (2006)
Barometer	1018.3 ^hPa	1023 ^hPa	1013.9 ^hPa	1034.5 ^hPa (2011)	995.9 ^hPa (2003)
Wind Speed	9.7 ^km/h	22.9 ^km/h		48.1 ^km/h (2014)
Wind Gust		49.1 ^km/h		64.9 ^km/h (2014)
Precipitation	12.19 ^mm			34.29 ^mm (2003)

Weather Element	Average
Visibility	13 ^km
Wind Direction	SSW (210.5 °)

Weather Element	Total
Heating Degree Days	15 (Base 18.3)
Growing Degree Days	2.9 (Base 10)

Total Years on Record: 21

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