RESTON, VIRGINIA

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Elevation: 88 meters Latitude: 38 57N Longitude: 077 27W

WEATHER

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DAILY WEATHER AVERAGE - 18 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	2.6 ^°C	7.2 ^°C	-1.9 ^°C	24.4 ^°C (2006)	-7.2 ^°C (2010)
Dewpoint	-3.1 ^°C	0.4 ^°C	-6.2 ^°C	15 ^°C (2006)	-11.7 ^°C (1998)
Humidity	68.5 ^%	87.9 ^%	48 ^%		31 ^% (1998)
Barometer	1020 ^hPa	1023.7 ^hPa	1015.9 ^hPa	1034.9 ^hPa (2005)	992.6 ^hPa (2001)
Wind Speed	9.3 ^km/h	20.3 ^km/h		40.7 ^km/h (2001)
Wind Gust		41.7 ^km/h		59.2 ^km/h (2001)
Precipitation	3.81 ^mm			6.86 ^mm (2009)

Weather Element	Average
Visibility	15 ^km
Wind Direction	SSW (215.1 °)

Weather Element	Total
Heating Degree Days	15.7 (Base 18.3)
Growing Degree Days	6.1 (Base 10)

Total Years on Record: 21

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