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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 - 20 MAY, 2015
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[ °F ]   °C
Weather ElementAverageHighLow
Temperature17.6 °C21 °C (12:52 am)13.9 °C (6:52 am)
Dewpoint7.1 °C11 °C (12:52 am)5 °C (7:52 pm)
Humidity50.5 %62 % (4:52 am)40 % (4:52 pm)
Barometer1015.2 hPa1016.6 hPa (9:52 pm)1012.9 hPa (12:52 am)
Wind Speed20.3 km/h35.2 km/h (9:52 am)
Wind Gust46.3 km/h (9:52 am)
Weather ElementAverage
Visibility16.1 km
Wind DirectionWSW (252.5 °)

Weather ElementTotal
Precipitation---
Heating Degree Days0.9 (Base 18.3)
Growing Degree Days7.4 (Base 10)
Averaged from 24 records on 20 May, 2015
WEATHER CONDITIONS BREAKOUT
WIND DIRECTION BREAKOUT
WEATHER BY HOUR - 20 MAY, 2015
[ °F ]   °C
Local TimeTemperatureDewpointHumidityBarometerVisibilityWind DirectionWind SpeedGust SpeedPrecipitationEventsConditions
12:52 AM21 °C11 °C53 %1012.9 hPa16.1 kmNW (310°)18.5 km/hPartly Cloudy
1:52 AM20.6 °C8.9 °C47 %1013.2 hPa16.1 kmNW (320°)18.5 km/hClear
2:52 AM18.3 °C9.4 °C56 %1013.9 hPa16.1 kmNNW (330°)24.1 km/hClear
3:52 AM16.7 °C8.9 °C60 %1014.6 hPa16.1 kmNNW (340°)22.2 km/h37 km/hClear
4:52 AM15 °C7.8 °C62 %1014.6 hPa16.1 kmNorth (350°)20.4 km/hClear
5:52 AM14.4 °C7.2 °C62 %1014.6 hPa16.1 kmNNW (340°)16.7 km/hPartly Cloudy
6:52 AM13.9 °C6.7 °C62 %1015.2 hPa16.1 kmNNW (340°)16.7 km/h31.5 km/hPartly Cloudy
7:52 AM15 °C6.1 °C55 %1015.6 hPa16.1 kmNNW (340°)24.1 km/h33.3 km/hScattered Clouds
8:52 AM15.6 °C5.6 °C51 %1016.3 hPa16.1 kmNW (320°)29.6 km/h44.4 km/hScattered Clouds
9:52 AM16.1 °C5.6 °C50 %1015.9 hPa16.1 kmNW (310°)35.2 km/h46.3 km/hScattered Clouds
10:52 AM17.2 °C6.7 °C50 %1016.3 hPa16.1 kmNNW (340°)24.1 km/h35.2 km/hScattered Clouds
11:52 AM17.8 °C7.2 °C50 %1016.3 hPa16.1 kmNNW (330°)25.9 km/h35.2 km/hMostly Cloudy
12:52 PM19 °C8 °C49 %1015.9 hPa16.1 kmNW (320°)22.2 km/h31.5 km/hMostly Cloudy
1:52 PM20 °C8.3 °C47 %1015.6 hPa16.1 kmNNW (330°)16.7 km/h27.8 km/hScattered Clouds
2:52 PM20.6 °C7.8 °C44 %1015.2 hPa16.1 kmNW (320°)22.2 km/h35.2 km/hMostly Cloudy
3:52 PM20.6 °C7.2 °C42 %1015.2 hPa16.1 kmNW (320°)16.7 km/h38.9 km/hMostly Cloudy
4:52 PM21 °C7 °C40 %1015.2 hPa16.1 kmNNW (340°)22.2 km/hMostly Cloudy
5:52 PM20 °C6.1 °C40 %1015.2 hPa16.1 kmNNW (330°)22.2 km/h35.2 km/hMostly Cloudy
6:52 PM18.9 °C6.7 °C45 %1015.6 hPa16.1 kmNorth (10°)16.7 km/hMostly Cloudy
7:52 PM17.8 °C5 °C43 %1015.6 hPa16.1 kmNorth (10°)16.7 km/hScattered Clouds
8:52 PM16.7 °C5.6 °C48 %1015.9 hPa16.1 kmNNE (20°)14.8 km/hScattered Clouds
9:52 PM16.1 °C5.6 °C50 %1016.6 hPa16.1 kmNNE (30°)13 km/hMostly Cloudy
10:52 PM15 °C5.6 °C53 %1016.3 hPa16.1 kmNE (40°)16.7 km/hMostly Cloudy
11:52 PM14.4 °C5 °C53 %1016.3 hPa16.1 kmNNE (20°)9.3 km/hMostly Cloudy
Hourly data recorded from KIAD, located 0 kilometers away from Herndon, Virginia




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