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HERNDON, VIRGINIA


Home > North America > United States > Virginia
Elevation: 98 meters     Latitude: 38 57N     Longitude: 077 27W

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Number of Records: 213,900;   Date Range: 1/1/95 - 3/22/16
 
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WEATHER ALMANAC - 30 AUGUST, 2015
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[ °F ]   °C
Weather ElementAverageHighLow
Temperature24.3 °C30 °C (3:52 pm)17.8 °C (5:52 am)
Dewpoint18.1 °C19.4 °C (6:52 pm)16.7 °C (5:52 am)
Humidity69.9 %93 % (5:52 am)48 % (3:52 pm)
Barometer1019.3 hPa1020.7 hPa (9:52 am)1017.9 hPa (4:52 pm)
Wind Speed7.1 km/h13 km/h (6:52 pm)
Weather ElementAverage
Visibility16.1 km
Wind DirectionSSE (150 °)

Weather ElementTotal
Precipitation---
Cooling Degree Days5.6 (Base 18.3)
Growing Degree Days13.9 (Base 10)
Averaged from 24 records on 30 August, 2015
WEATHER CONDITIONS BREAKOUT
WIND DIRECTION BREAKOUT
WEATHER BY HOUR - 30 AUGUST, 2015
[ °F ]   °C
Local TimeTemperatureDewpointHumidityBarometerVisibilityWind DirectionWind SpeedGust SpeedPrecipitationEventsConditions
12:52 AM22.2 °C17.8 °C76 %1020 hPa16.1 kmSouth (180°)11.1 km/hPartly Cloudy
1:52 AM20.6 °C17.8 °C84 %1019.3 hPa16.1 kmSouth (180°)7.4 km/hClear
2:52 AM20 °C17.8 °C87 %1019 hPa16.1 kmSouth (180°)9.3 km/hClear
3:52 AM20.6 °C17.2 °C81 %1019 hPa16.1 kmSouth (170°)11.1 km/hClear
4:52 AM19.4 °C17.2 °C87 %1019 hPa16.1 kmCalmPartly Cloudy
5:52 AM17.8 °C16.7 °C93 %1019.3 hPa16.1 kmCalmScattered Clouds
6:52 AM18.3 °C16.7 °C90 %1020 hPa14.5 kmSouth (170°)5.6 km/hMostly Cloudy
7:52 AM20 °C17.8 °C87 %1020 hPa16.1 kmSSW (200°)5.6 km/hMostly Cloudy
8:52 AM21.1 °C17.8 °C81 %1020.3 hPa16.1 kmSW (230°)5.6 km/hOvercast
9:52 AM23.3 °C17.8 °C71 %1020.7 hPa16.1 kmSSW (200°)5.6 km/hMostly Cloudy
10:52 AM24.4 °C18.3 °C69 %1020.7 hPa16.1 kmSSW (210°)5.6 km/hMostly Cloudy
11:52 AM26.1 °C18.3 °C62 %1020.3 hPa16.1 kmCalmMostly Cloudy
12:52 PM27.2 °C18.3 °C58 %1020 hPa16.1 kmCalmOvercast
1:52 PM27.2 °C18.3 °C58 %1019.6 hPa16.1 kmSSW (200°)7.4 km/hMostly Cloudy
2:52 PM29.4 °C18.9 °C53 %1019 hPa16.1 kmCalmMostly Cloudy
3:52 PM30 °C17.8 °C48 %1018.3 hPa16.1 kmSW (220°)11.1 km/hScattered Clouds
4:52 PM30 °C17.8 °C48 %1017.9 hPa16.1 kmSouth (180°)11.1 km/hMostly Cloudy
5:52 PM28.3 °C18.9 °C56 %1017.9 hPa16.1 kmSouth (190°)11.1 km/hMostly Cloudy
6:52 PM27.8 °C19.4 °C60 %1017.9 hPa16.1 kmSouth (170°)13 km/hMostly Cloudy
7:52 PM26.7 °C18.3 °C60 %1017.9 hPa16.1 kmSouth (170°)7.4 km/hMostly Cloudy
8:52 PM26.1 °C18.3 °C62 %1018.3 hPa16.1 kmSouth (180°)11.1 km/hOvercast
9:52 PM25.6 °C18.9 °C66 %1019 hPa16.1 kmSouth (190°)7.4 km/hOvercast
10:52 PM25 °C19.4 °C71 %1018.6 hPa16.1 kmSouth (180°)11.1 km/hOvercast
11:52 PM25 °C18.9 °C69 %1018.6 hPa16.1 kmSSW (200°)13 km/hOvercast
Hourly data recorded from KIAD, located 0 kilometers away from Herndon, Virginia




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