HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - 22 JULY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	25.2 ^°C	30.9 ^°C	20.4 ^°C	40.6 ^°C (2011)	13.3 ^°C (2001)
Dewpoint	19.2 ^°C	21.1 ^°C	17.2 ^°C	25 ^°C (1999)	7.2 ^°C (2007)
Humidity	72.1 ^%	91.7 ^%	48 ^%		25 ^% (2007)
Barometer	1014.9 ^hPa	1016.9 ^hPa	1012.9 ^hPa	1022.7 ^hPa (2012)	1005.4 ^hPa (2006)
Wind Speed	9 ^km/h	21.4 ^km/h		48.1 ^km/h (2008)
Wind Gust		38.1 ^km/h		64.9 ^km/h (2008)
Precipitation	9.65 ^mm			39.12 ^mm (2003)

Weather Element	Average
Visibility	12.7 ^km
Wind Direction	S (184.4 °)

Weather Element	Total
Cooling Degree Days	7.4 (Base 18.3)
Growing Degree Days	15.7 (Base 10)

Total Years on Record: 21

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