HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - 15 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	20.1 ^°C	25.6 ^°C	14 ^°C	35 ^°C (1998)	6.1 ^°C (2013)
Dewpoint	14.2 ^°C	17.3 ^°C	11.3 ^°C	22 ^°C (2005)	3.3 ^°C (2010)
Humidity	72.6 ^%	94.1 ^%	47.7 ^%		28 ^% (2010)
Barometer	1017.9 ^hPa	1021 ^hPa	1015.2 ^hPa	1029.5 ^hPa (2015)	1005.8 ^hPa (2008)
Wind Speed	9.5 ^km/h	22.2 ^km/h		46.3 ^km/h (2011)
Wind Gust		45.9 ^km/h		98.2 ^km/h (2007)
Precipitation	7.87 ^mm			38.86 ^mm (2006)

Weather Element	Average
Visibility	13.4 ^km
Wind Direction	SSW (201.1 °)

Total Years on Record: 20

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