HERNDON, VIRGINIA

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Elevation: 98 meters Latitude: 38 57N Longitude: 077 27W

WEATHER

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DAILY WEATHER AVERAGE - 22 NOVEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	6.5 ^°C	11.7 ^°C	1.8 ^°C	22.8 ^°C (2007)	-9.4 ^°C (2014)
Dewpoint	0.7 ^°C	3.4 ^°C	-2.8 ^°C	15 ^°C (1999)	-17.2 ^°C (2001)
Humidity	69.9 ^%	87 ^%	49.1 ^%		20 ^% (2001)
Barometer	1019.6 ^hPa	1023 ^hPa	1015.9 ^hPa	1034.9 ^hPa (2014)	991.2 ^hPa (2005)
Wind Speed	11.3 ^km/h	23.2 ^km/h		51.8 ^km/h (2007)
Wind Gust		47.8 ^km/h		66.6 ^km/h (2007)
Precipitation	9.91 ^mm			32.51 ^mm (2006)

Weather Element	Average
Visibility	13.4 ^km
Wind Direction	SSW (218.4 °)

Weather Element	Total
Heating Degree Days	11.6 (Base 18.3)
Growing Degree Days	2.4 (Base 10)

Total Years on Record: 21

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