HERNDON, VIRGINIA

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Elevation: 98 meters Latitude: 38 57N Longitude: 077 27W

WEATHER

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Number of Records: 213,900; Date Range: 1/1/95 - 3/22/16

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WEATHER ALMANAC - 27 MARCH, 2015

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	6.6 ^°C	8.9 ^°C (12:52 am)	3.9 ^°C (11:52 pm)
Dewpoint	0.4 ^°C	5.6 ^°C (12:52 am)	-6 ^°C (10:52 pm)
Humidity	67.2 ^%	89 ^% (3:52 am)	42 ^% (4:52 pm)
Barometer	1009.1 ^hPa	1010.8 hPa (11:52 pm)	1008.1 hPa (12:52 am)
Wind Speed	16.3 ^km/h	29.6 ^km/h (4:16 am)
Wind Gust		38.9 ^km/h (4:16 am)

Weather Element	Average
Visibility	14.3 ^km
Wind Direction	NW (317.9 °)

Weather Element	Total
Precipitation	19.81 ^mm
Heating Degree Days	11.9 (Base 18.3)

Averaged from 28 records on 27 March, 2015

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 27 MARCH, 2015

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Gust Speed	Precipitation	Events	Conditions
12:52 AM	8.9 ^°C	5.6 ^°C	80 ^%	1008.1 hPa	9.7 ^km	NNW (330°)	18.5 ^km/h		1.52 mm	Rain	Rain
1:52 AM	7.8 ^°C	5.6 ^°C	86 ^%	1009.1 hPa	11.3 ^km	NNW (330°)	9.3 ^km/h		2.79 mm	Rain	Light Rain
2:52 AM	7.2 ^°C	4.4 ^°C	82 ^%	1008.5 hPa	11.3 ^km	North (350°)	18.5 ^km/h		1.52 mm	Rain	Light Rain
3:52 AM	6.7 ^°C	5 ^°C	89 ^%	1009.8 hPa	8 ^km	NW (320°)	14.8 ^km/h		3.56 mm	Rain	Light Rain
4:16 AM	6 ^°C	3 ^°C	81 ^%	1009.5 hPa	6.4 ^km	NNW (330°)	29.6 ^km/h	38.9 ^km/h	2.03 mm	Rain	Heavy Rain
4:52 AM	5.6 ^°C	3.3 ^°C	85 ^%	1009.5 hPa	8 ^km	NNE (20°)	11.1 ^km/h		5.08 mm	Rain	Rain
5:52 AM	5.6 ^°C	3.9 ^°C	89 ^%	1008.5 hPa	9.7 ^km	NNE (30°)	11.1 ^km/h		2.29 mm	Rain	Light Rain
6:40 AM	6 ^°C	4 ^°C	87 ^%	1008.8 hPa	16.1 ^km	North (350°)	13 ^km/h		0 mm	Rain	Light Rain
6:52 AM	6.1 ^°C	3.9 ^°C	86 ^%	1008.8 hPa	14.5 ^km	North (360°)	13 ^km/h		0.25 mm	Rain	Light Rain
6:54 AM	6 ^°C	4 ^°C	87 ^%	1008.8 hPa	14.5 ^km	North (360°)	14.8 ^km/h		0 mm	Rain	Light Rain
7:52 AM	5.6 ^°C	1.7 ^°C	76 ^%	1009.5 hPa	16.1 ^km	North (360°)	16.7 ^km/h		0.76 mm	Rain	Light Rain
7:59 AM	6 ^°C	2 ^°C	76 ^%	1009.1 hPa	16.1 ^km	North (350°)	16.7 ^km/h		0 mm		Overcast
8:52 AM	5.6 ^°C	1.7 ^°C	76 ^%	1009.5 hPa	16.1 ^km	NNW (340°)	13 ^km/h		0 mm		Overcast
9:52 AM	5.6 ^°C	1.1 ^°C	73 ^%	1010.5 hPa	16.1 ^km	NNW (330°)	13 ^km/h		0 mm	Rain	Light Rain
10:52 AM	6.1 ^°C	1.1 ^°C	71 ^%	1010.2 hPa	16.1 ^km	NNW (340°)	18.5 ^km/h		0 mm		Overcast
11:52 AM	5.6 ^°C	0 ^°C	67 ^%	1010.2 hPa	16.1 ^km	NNW (330°)	16.7 ^km/h				Overcast
12:52 PM	7.2 ^°C	-0.6 ^°C	58 ^%	1009.5 hPa	16.1 ^km	NNW (330°)	22.2 ^km/h	31.5 ^km/h			Mostly Cloudy
1:52 PM	7.8 ^°C	-1.1 ^°C	54 ^%	1009.5 hPa	16.1 ^km	NNW (340°)	18.5 ^km/h				Mostly Cloudy
2:52 PM	7.2 ^°C	-2.2 ^°C	52 ^%	1008.8 hPa	16.1 ^km	North (350°)	13 ^km/h				Overcast
3:52 PM	8.3 ^°C	-1.7 ^°C	50 ^%	1008.1 hPa	16.1 ^km	North (360°)	14.8 ^km/h				Overcast
4:52 PM	8.9 ^°C	-3.3 ^°C	42 ^%	1008.1 hPa	16.1 ^km	NNW (330°)	20.4 ^km/h				Mostly Cloudy
5:52 PM	8.3 ^°C	-2.8 ^°C	46 ^%	1008.1 hPa	16.1 ^km	North (360°)	13 ^km/h				Overcast
6:52 PM	7.8 ^°C	-3.3 ^°C	46 ^%	1008.5 hPa	16.1 ^km	NNW (330°)	11.1 ^km/h				Mostly Cloudy
7:52 PM	7.2 ^°C	-3.3 ^°C	48 ^%	1009.5 hPa	16.1 ^km	NW (320°)	14.8 ^km/h				Overcast
8:52 PM	6.7 ^°C	-3.9 ^°C	47 ^%	1009.8 hPa	16.1 ^km	NNW (330°)	18.5 ^km/h				Overcast
9:52 PM	5.6 ^°C	-5 ^°C	47 ^%	1010.5 hPa	16.1 ^km	NNW (340°)	16.7 ^km/h				Overcast
10:52 PM	5 ^°C	-6 ^°C	45 ^%	1010.5 hPa	16.1 ^km	NNW (340°)	24.1 ^km/h				Scattered Clouds
11:52 PM	3.9 ^°C	-4.4 ^°C	55 ^%	1010.8 hPa	16.1 ^km	NNW (340°)	20.4 ^km/h				Scattered Clouds

Hourly data recorded from KIAD, located 0 kilometers away from Herndon, Virginia