HERNDON, VIRGINIA

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

WEATHER

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DAILY WEATHER AVERAGE - 25 MARCH

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	8 ^°C	13.8 ^°C	1.6 ^°C	23.9 ^°C (2003)	-5 ^°C (1998)
Dewpoint	-0.3 ^°C	3.1 ^°C	-4.2 ^°C	16 ^°C (2000)	-13.3 ^°C (1995)
Humidity	60.8 ^%	84 ^%	39 ^%		16 ^% (1995)
Barometer	1019.3 ^hPa	1023 ^hPa	1015.2 ^hPa	1036.2 ^hPa (1998)	1000 ^hPa (2013)
Wind Speed	12.4 ^km/h	23.5 ^km/h		40.7 ^km/h (1996)
Wind Gust		36.5 ^km/h		59.2 ^km/h (2010)
Precipitation	5.59 ^mm			15.75 ^mm (2013)

Weather Element	Average
Visibility	15.9 ^km
Wind Direction	SSW (199.9 °)

Weather Element	Total
Heating Degree Days	10.7 (Base 18.3)
Growing Degree Days	3.2 (Base 10)

Total Years on Record: 21

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