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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 21
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[ °C ]   °F
Weather ElementAvgAvg HighAvg LowRecord HighRecord Low
Temperature 67 °F 77.6 °F 56.3 °F 90 °F (1998) 44.1 °F (2006)
Dewpoint 56.6 °F 62.1 °F 51.4 °F 73.4 °F (1998) 39.2 °F (2005)
Humidity 72.5 % 93.9 % 48.3 % 22 % (2005)
Barometer 30.07 in 30.15 in 30.00 in 30.34 in (2004) 29.65 in (2014)
Wind Speed 5.3 mph 11.4 mph 17.3 mph (2000)
Wind Gust 21.6 mph 25.3 mph (2000)
Precipitation 1.13 in 3.69 in (2013)
Weather ElementAverage
Visibility8.6 mi
Wind DirectionS (178.1 °)
Weather ElementTotal
Heating Degree Days4.6 (Base 18.3)
Cooling Degree Days6.3 (Base 18.3)
Growing Degree Days16.9 (Base 10)
Total Years on Record: 20
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WIND DIRECTION BREAKOUT




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