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United States of America

HERNDON, VIRGINIA


Home > North America > United States > Virginia
Elevation: 322 feet     Latitude: 38 57N     Longitude: 077 27W

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DAILY WEATHER AVERAGE - SEPTEMBER 18
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[ °C ]   °F
Weather ElementAvgAvg HighAvg LowRecord HighRecord Low
Temperature 65.7 °F 76.9 °F 55.3 °F 84 °F (2005) 41 °F (2013)
Dewpoint 55.4 °F 60.2 °F 50.3 °F 71.6 °F (2003) 39 °F (2007)
Humidity 72.4 % 94.4 % 44.5 % 35 % (2007)
Barometer 30.07 in 30.17 in 29.98 in 30.41 in (2007) 29.49 in (2003)
Wind Speed 5.7 mph 12.3 mph 32.2 mph (2003)
Wind Gust 29.2 mph 48.3 mph (2003)
Precipitation 1.81 in 3.98 in (2003)
Weather ElementAverage
Visibility9 mi
Wind DirectionSSE (159.4 °)
Weather ElementTotal
Heating Degree Days4.6 (Base 18.3)
Cooling Degree Days4.2 (Base 18.3)
Growing Degree Days16.1 (Base 10)
Total Years on Record: 20
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