DULLES, VIRGINIA

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

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DAILY WEATHER AVERAGE - 11 JULY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	23.8 ^°C	29.5 ^°C	17.8 ^°C	33.9 ^°C (2011)	12.2 ^°C (1997)
Dewpoint	16.7 ^°C	19.2 ^°C	13.9 ^°C	23.3 ^°C (2011)	5.6 ^°C (1997)
Humidity	67.5 ^%	92 ^%	42.4 ^%		25 ^% (1997)
Barometer	1016.6 ^hPa	1018.6 ^hPa	1014.6 ^hPa	1026.1 ^hPa (1996)	1005.1 ^hPa (2001)
Wind Speed	8.5 ^km/h	19.5 ^km/h		33.3 ^km/h (2008)
Wind Gust		37.2 ^km/h		48.1 ^km/h (2008)
Precipitation	25.91 ^mm			117.09 ^mm (2013)

Weather Element	Average
Visibility	14 ^km
Wind Direction	S (180.8 °)

Weather Element	Total
Cooling Degree Days	5.3 (Base 18.3)
Growing Degree Days	13.6 (Base 10)

Total Years on Record: 21

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