HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - DECEMBER 10

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	38.5 ^°F	46.8 ^°F	29.2 ^°F	63 ^°F (2008)	14 ^°F (1995)
Dewpoint	30.1 ^°F	35.3 ^°F	22.7 ^°F	59 ^°F (2008)	-2.9 ^°F (2006)
Humidity	74.7 ^%	88.7 ^%	56.8 ^%		25 ^% (2006)
Barometer	30.07 ⁱⁿ	30.21 ⁱⁿ	29.94 ⁱⁿ	30.55 ⁱⁿ (2011)	29.41 ⁱⁿ (2003)
Wind Speed	6 ^mph	14.2 ^mph		29.9 ^mph (2014)
Wind Gust		30.5 ^mph		40.3 ^mph (2014)
Precipitation	0.48 ⁱⁿ			1.35 ⁱⁿ (2003)

Weather Element	Average
Visibility	8.1 ^mi
Wind Direction	SSW (210.5 °)

Weather Element	Total
Heating Degree Days	27 (Base 18.3)
Growing Degree Days	5.3 (Base 10)

Total Years on Record: 21

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