HERNDON, VIRGINIA

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

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DAILY WEATHER AVERAGE - 28 JUNE

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	23.7 ^°C	28.8 ^°C	18.7 ^°C	34 ^°C (2001)	12.8 ^°C (1997)
Dewpoint	18.3 ^°C	20.4 ^°C	16.1 ^°C	25.6 ^°C (1999)	11.1 ^°C (2012)
Humidity	74.2 ^%	94.8 ^%	51.9 ^%		26 ^% (2012)
Barometer	1014.9 ^hPa	1017.3 ^hPa	1012.5 ^hPa	1025.4 ^hPa (2014)	1002.4 ^hPa (2009)
Wind Speed	8.4 ^km/h	20.9 ^km/h		35.2 ^km/h (2010)
Wind Gust		39.4 ^km/h		55.5 ^km/h (2005)
Precipitation	24.13 ^mm			55.63 ^mm (1999)

Weather Element	Average
Visibility	13.7 ^km
Wind Direction	S (180.7 °)

Weather Element	Total
Cooling Degree Days	5.4 (Base 18.3)
Growing Degree Days	13.8 (Base 10)

Total Years on Record: 20

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