RESTON, VIRGINIA

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

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DAILY WEATHER AVERAGE - 31 JULY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	24.8 ^°C	30.4 ^°C	19.4 ^°C	36.7 ^°C (1999)	10.6 ^°C (1997)
Dewpoint	18.3 ^°C	20.5 ^°C	15.8 ^°C	24 ^°C (2004)	6.7 ^°C (2011)
Humidity	70.8 ^%	92.1 ^%	46.7 ^%		17 ^% (2011)
Barometer	1016.3 ^hPa	1018.3 ^hPa	1014.6 ^hPa	1026.1 ^hPa (2001)	1004.7 ^hPa (2008)
Wind Speed	8.7 ^km/h	19.6 ^km/h		42.6 ^km/h (2009)
Wind Gust		35.7 ^km/h		57.5 ^km/h (2009)
Precipitation	8.64 ^mm			17.78 ^mm (2009)

Weather Element	Average
Visibility	14.2 ^km
Wind Direction	SSE (172.1 °)

Weather Element	Total
Cooling Degree Days	6.6 (Base 18.3)
Growing Degree Days	14.9 (Base 10)

Total Years on Record: 21

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