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 - 1 DECEMBER, 2015

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	6.4 ^°C	8.3 ^°C (11:52 pm)	3.9 ^°C (12:52 am)
Dewpoint	5.8 ^°C	7.8 ^°C (9:52 pm)	3.3 ^°C (12:52 am)
Humidity	95.7 ^%	100 ^% (9:52 pm)	89 ^% (2:14 pm)
Barometer	1018.6 ^hPa	1022.7 hPa (12:52 am)	1014.6 hPa (11:52 pm)
Wind Speed	6 ^km/h	11.1 ^km/h (1:52 am)

Weather Element	Average
Visibility	4.5 ^km
Wind Direction	SSW (207.4 °)

Weather Element	Total
Precipitation	14.99 ^mm
Heating Degree Days	12.3 (Base 18.3)

Averaged from 31 records on 1 December, 2015

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WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 1 DECEMBER, 2015

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Precipitation	Events	Conditions
12:52 AM	3.9 ^°C	3.3 ^°C	96 ^%	1022.7 hPa	3.2 ^km	NNW (340°)	9.3 ^km/h	0.51 mm	Rain	Light Rain
1:52 AM	4.4 ^°C	3.9 ^°C	97 ^%	1022.4 hPa	3.2 ^km	North (350°)	11.1 ^km/h	0.51 mm		Overcast
2:52 AM	4.4 ^°C	3.9 ^°C	97 ^%	1022.4 hPa	3.2 ^km	NNW (340°)	11.1 ^km/h	0.25 mm		Overcast
3:52 AM	4.4 ^°C	3.9 ^°C	97 ^%	1021.7 hPa	4 ^km	North (350°)	11.1 ^km/h	0.25 mm		Overcast
4:52 AM	5 ^°C	4.4 ^°C	96 ^%	1021.3 hPa	4 ^km	NNW (340°)	5.6 ^km/h	0.25 mm		Light Drizzle
5:52 AM	5 ^°C	4.4 ^°C	96 ^%	1021 hPa	2.4 ^km	NNW (330°)	5.6 ^km/h	0.25 mm	Rain	Light Rain
6:52 AM	5 ^°C	4.4 ^°C	96 ^%	1021 hPa	2.4 ^km	NW (320°)	7.4 ^km/h	1.52 mm	Rain	Light Rain
7:52 AM	5 ^°C	4.4 ^°C	96 ^%	1020.7 hPa	2.4 ^km	NW (320°)	5.6 ^km/h	2.54 mm	Rain	Light Rain
7:59 AM	5 ^°C	4.4 ^°C	96 ^%	1020.7 hPa	2.4 ^km	NW (320°)	5.6 ^km/h	0.25 mm	Rain	Light Rain
8:52 AM	5.6 ^°C	5 ^°C	96 ^%	1020.7 hPa	2.4 ^km	West (260°)	5.6 ^km/h	1.52 mm	Rain	Light Rain
9:52 AM	5.6 ^°C	4.4 ^°C	92 ^%	1021.3 hPa	2.4 ^km	NW (310°)	7.4 ^km/h	3.81 mm	Rain	Rain
10:52 AM	6.1 ^°C	5 ^°C	93 ^%	1020.7 hPa	2.4 ^km	NW (310°)	7.4 ^km/h	1.78 mm	Rain	Light Rain
10:59 AM	6.1 ^°C	5 ^°C	93 ^%	1020.3 hPa	11.3 ^km	NW (320°)	7.4 ^km/h	0 mm	Rain	Light Rain
11:52 AM	6.1 ^°C	5.6 ^°C	97 ^%	1020 hPa	4.8 ^km	West (260°)	7.4 ^km/h	0.76 mm	Rain	Light Rain
12:52 PM	6.7 ^°C	6.1 ^°C	96 ^%	1019 hPa	4.8 ^km	Calm		0 mm	Rain	Light Rain
1:52 PM	7.2 ^°C	6.1 ^°C	93 ^%	1017.6 hPa	4.8 ^km	Calm		0.76 mm	Rain	Light Rain
2:14 PM	7.8 ^°C	6.1 ^°C	89 ^%	1016.6 hPa	4.8 ^km	Calm		0 mm	Rain	Light Rain
2:52 PM	7.8 ^°C	6.7 ^°C	93 ^%	1016.9 hPa	4.8 ^km	South (170°)	7.4 ^km/h	0 mm	Rain	Light Rain
3:52 PM	7.8 ^°C	6.7 ^°C	93 ^%	1017.3 hPa	4.8 ^km	South (180°)	11.1 ^km/h	0 mm		Overcast
4:52 PM	7.2 ^°C	6.7 ^°C	97 ^%	1017.3 hPa	16.1 ^km	SSW (200°)	5.6 ^km/h			Overcast
5:52 PM	7.2 ^°C	6.7 ^°C	97 ^%	1017.3 hPa	16.1 ^km	SSW (210°)	7.4 ^km/h			Overcast
6:52 PM	7.2 ^°C	6.7 ^°C	97 ^%	1016.6 hPa	14.5 ^km	South (190°)	5.6 ^km/h			Overcast
7:21 PM	7.2 ^°C	6.7 ^°C	97 ^%	1016.6 hPa	11.3 ^km	Calm				Overcast
7:25 PM	7.2 ^°C	6.7 ^°C	97 ^%	1016.3 hPa	1.6 ^km	Calm				Overcast
7:52 PM	7.8 ^°C	6.7 ^°C	93 ^%	1016.3 hPa	1.6 ^km	Calm				Overcast
8:09 PM	7.2 ^°C	6.7 ^°C	97 ^%	1015.9 hPa	0.8 ^km	South (180°)	5.6 ^km/h		Fog	Fog
8:52 PM	7.8 ^°C	7.2 ^°C	96 ^%	1015.9 hPa	0.8 ^km	SSE (150°)	9.3 ^km/h		Fog	Fog
8:58 PM	7.8 ^°C	7.2 ^°C	96 ^%	1016.3 hPa	0.2 ^km	South (180°)	5.6 ^km/h		Fog	Fog
9:52 PM	7.8 ^°C	7.8 ^°C	100 ^%	1016.3 hPa	0.2 ^km	South (190°)	5.6 ^km/h		Fog	Fog
10:52 PM	7.8 ^°C	7.8 ^°C	100 ^%	1015.6 hPa	0.2 ^km	South (170°)	7.4 ^km/h		Fog	Fog
11:52 PM	8.3 ^°C	7.8 ^°C	97 ^%	1014.6 hPa	0.2 ^km	SE (140°)	5.6 ^km/h	0 mm	Fog	Fog

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