HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - 21 NOVEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	6.2 ^°C	11.7 ^°C	1.2 ^°C	23.9 ^°C (2007)	-7 ^°C (2014)
Dewpoint	0.8 ^°C	3.6 ^°C	-2.3 ^°C	13.9 ^°C (2011)	-14.4 ^°C (2014)
Humidity	71.1 ^%	89.6 ^%	48.3 ^%		31 ^% (2003)
Barometer	1020.7 ^hPa	1024.4 ^hPa	1016.6 ^hPa	1035.6 ^hPa (2013)	996.6 ^hPa (2005)
Wind Speed	8.7 ^km/h	20.4 ^km/h		38.9 ^km/h (2008)
Wind Gust		40.2 ^km/h		59.2 ^km/h (2008)
Precipitation	14.48 ^mm			27.94 ^mm (2005)

Weather Element	Average
Visibility	13.5 ^km
Wind Direction	SSW (214.7 °)

Weather Element	Total
Heating Degree Days	11.9 (Base 18.3)
Growing Degree Days	3.7 (Base 10)

Total Years on Record: 21

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