HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - AUGUST 15

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	75.6 ^°F	85.3 ^°F	66 ^°F	95 ^°F (2002)	53.1 ^°F (2014)
Dewpoint	63.5 ^°F	67.3 ^°F	58.9 ^°F	77 ^°F (2002)	42.8 ^°F (2007)
Humidity	68.7 ^%	90.7 ^%	46.3 ^%		26 ^% (2007)
Barometer	30.03 ⁱⁿ	30.08 ⁱⁿ	29.96 ⁱⁿ	30.27 ⁱⁿ (2004)	29.68 ⁱⁿ (2011)
Wind Speed	5.3 ^mph	10.9 ^mph		18.4 ^mph (1997)
Wind Gust		19.4 ^mph		23 ^mph (2011)
Precipitation	0.16 ⁱⁿ			0.82 ⁱⁿ (2010)

Weather Element	Average
Visibility	8.8 ^mi
Wind Direction	SSW (192.7 °)

Weather Element	Total
Cooling Degree Days	10.7 (Base 18.3)
Growing Degree Days	25.7 (Base 10)

Total Years on Record: 20

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