HERNDON, VIRGINIA

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

WEATHER

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DAILY WEATHER AVERAGE - 23 JANUARY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-0.6 ^°C	3.9 ^°C	-5.1 ^°C	21.1 ^°C (1999)	(2014)
Dewpoint	-6.3 ^°C	-2.2 ^°C	-10.1 ^°C	17.2 ^°C (1999)	-22.2 ^°C (2008)
Humidity	68.7 ^%	90 ^%	48.9 ^%		26 ^% (2008)
Barometer	1018.6 ^hPa	1024.4 ^hPa	1013.9 ^hPa	1031.5 ^hPa (2014)	1002.7 ^hPa (2016)
Wind Speed	12.9 ^km/h	25.4 ^km/h		48.1 ^km/h (2005)
Wind Gust		46.5 ^km/h		74 ^km/h (2016)
Precipitation	19.3 ^mm			49.02 ^mm (1998)

Weather Element	Average
Visibility	13 ^km
Wind Direction	SW (221.8 °)

Weather Element	Total
Heating Degree Days	18.9 (Base 18.3)
Growing Degree Days	4.2 (Base 10)

Total Years on Record: 22

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