HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - 28 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	18.9 ^°C	24.2 ^°C	13.6 ^°C	29.4 ^°C (1998)	5.6 ^°C (2000)
Dewpoint	14.2 ^°C	17.4 ^°C	10.7 ^°C	23 ^°C (2004)	-1.1 ^°C (2009)
Humidity	77.2 ^%	96.5 ^%	53.1 ^%		18 ^% (2009)
Barometer	1014.9 ^hPa	1018.6 ^hPa	1011.2 ^hPa	1026.8 ^hPa (2013)	997.6 ^hPa (2009)
Wind Speed	11.4 ^km/h	24.5 ^km/h		42.6 ^km/h (2006)
Wind Gust		41.7 ^km/h		59.2 ^km/h (2006)
Precipitation	18.8 ^mm			77.72 ^mm (2004)

Weather Element	Average
Visibility	13.5 ^km
Wind Direction	SSW (196 °)

Total Years on Record: 20

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