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United States of America

DULLES, VIRGINIA


Home > North America > United States > Virginia
Elevation: 290 feet     Latitude: 38 57N     Longitude: 077 27W

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DAILY WEATHER AVERAGE - AUGUST 29
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[ °C ]   °F
Weather ElementAvgAvg HighAvg LowRecord HighRecord Low
Temperature 74.2 °F 84.5 °F 65.6 °F 96.1 °F (2006) 54 °F (2014)
Dewpoint 63.9 °F 67.4 °F 59.6 °F 75 °F (2003) 48.9 °F (1999)
Humidity 72.8 % 93.5 % 49.2 % 33 % (1999)
Barometer 30.00 in 30.06 in 29.94 in 30.28 in (2010) 29.70 in (2009)
Wind Speed 5 mph 11 mph 16.1 mph (2003)
Wind Gust 21 mph 24.2 mph (2003)
Precipitation 0.31 in 1.46 in (2008)
Weather ElementAverage
Visibility8.2 mi
Wind DirectionSSW (187.5 °)
Weather ElementTotal
Heating Degree Days1.5 (Base 18.3)
Cooling Degree Days10.7 (Base 18.3)
Growing Degree Days25.1 (Base 10)
Total Years on Record: 20
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