HERNDON, VIRGINIA

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Elevation: 322 feet Latitude: 38 57N Longitude: 077 27W

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DAILY WEATHER AVERAGE - DECEMBER 11

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	38.1 ^°F	46 ^°F	30.1 ^°F	63 ^°F (2015)	15.1 ^°F (1995)
Dewpoint	28.3 ^°F	34 ^°F	21.5 ^°F	54 ^°F (2003)	-5.1 ^°F (2006)
Humidity	71.5 ^%	88.8 ^%	51.3 ^%		13 ^% (2006)
Barometer	30.08 ⁱⁿ	30.20 ⁱⁿ	29.94 ⁱⁿ	30.70 ⁱⁿ (2011)	29.31 ⁱⁿ (2003)
Wind Speed	6.2 ^mph	14.4 ^mph		31.1 ^mph (2003)
Wind Gust		27.2 ^mph		40.3 ^mph (2003)
Precipitation	0.88 ⁱⁿ			3.33 ⁱⁿ (2003)

Weather Element	Average
Visibility	8.3 ^mi
Wind Direction	SW (225 °)

Weather Element	Total
Heating Degree Days	27 (Base 18.3)

Total Years on Record: 21

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