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 - 16 DECEMBER, 2014

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	4.3 ^°C	6.7 ^°C (3:52 pm)	-2.2 ^°C (5:52 am)
Dewpoint	3.8 ^°C	6.1 ^°C (3:52 pm)	-2.8 ^°C (5:52 am)
Humidity	97 ^%	100 ^% (11:03 am)	85 ^% (9:52 am)
Barometer	1013.9 ^hPa	1017.3 hPa (12:52 am)	1011.2 hPa (3:52 pm)
Wind Speed	4.2 ^km/h	27.8 ^km/h (3:56 pm)
Wind Gust		46.3 ^km/h (3:56 pm)

Weather Element	Average
Visibility	4.3 ^km
Wind Direction	E (85.3 °)

Weather Element	Total
Precipitation	24.38 ^mm
Heating Degree Days	16.1 (Base 18.3)

Averaged from 40 records on 16 December, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 16 DECEMBER, 2014

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Gust Speed	Precipitation	Events	Conditions
12:52 AM	1.1 ^°C	0.6 ^°C	96 ^%	1017.3 hPa	9.7 ^km	Calm					Mostly Cloudy
1:52 AM	0.6 ^°C	0 ^°C	96 ^%	1017.3 hPa	9.7 ^km	Calm					Scattered Clouds
2:52 AM	1.1 ^°C	0.6 ^°C	96 ^%	1016.6 hPa	11.3 ^km	SE (130°)	7.4 ^km/h				Mostly Cloudy
3:52 AM	1.1 ^°C	0.6 ^°C	96 ^%	1016.6 hPa	11.3 ^km	Calm					Partly Cloudy
4:52 AM	2.2 ^°C	1.1 ^°C	93 ^%	1016.3 hPa	11.3 ^km	Calm					Partly Cloudy
5:52 AM	-2.2 ^°C	-2.8 ^°C	96 ^%	1016.3 hPa	8 ^km	Calm				Fog	Scattered Clouds
6:52 AM	-1.1 ^°C	-1.7 ^°C	96 ^%	1015.9 hPa	8 ^km	SSE (160°)	5.6 ^km/h			Fog	Mostly Cloudy
7:23 AM	1 ^°C	-1 ^°C	87 ^%	1015.6 hPa	4 ^km	SSE (150°)	5.6 ^km/h			Fog	Mostly Cloudy
7:52 AM	2.8 ^°C	2.2 ^°C	96 ^%	1015.6 hPa	4 ^km	South (170°)	5.6 ^km/h			Fog	Mostly Cloudy
7:59 AM	3 ^°C	2 ^°C	93 ^%	1015.2 hPa	4.8 ^km	Calm				Fog	Mostly Cloudy
8:52 AM	4.4 ^°C	3.3 ^°C	93 ^%	1015.9 hPa	4.8 ^km	Calm				Fog	Mostly Cloudy
9:52 AM	5.6 ^°C	3.3 ^°C	85 ^%	1015.6 hPa	4.8 ^km	South (190°)	9.3 ^km/h		0 mm		Overcast
10:22 AM	5 ^°C	4 ^°C	93 ^%	1015.6 hPa	2.9 ^km	SSW (210°)	7.4 ^km/h		1.02 mm	Rain	Rain
10:52 AM	4.4 ^°C	3.9 ^°C	97 ^%	1015.9 hPa	2.4 ^km	Calm			3.05 mm	Rain	Rain
11:03 AM	4 ^°C	4 ^°C	100 ^%	1014.9 hPa	1.9 ^km	Calm			1.27 mm	Rain	Rain
11:06 AM	4 ^°C	4 ^°C	100 ^%	1014.9 hPa	2.4 ^km	Calm			1.52 mm	Rain	Rain
11:40 AM	4 ^°C	4 ^°C	100 ^%	1014.9 hPa	2.9 ^km	SSE (160°)	7.4 ^km/h		3.56 mm	Rain	Light Rain
11:52 AM	4.4 ^°C	4.4 ^°C	100 ^%	1014.9 hPa	2.4 ^km	SSE (150°)	9.3 ^km/h		4.32 mm	Rain	Rain
12:00 PM	4 ^°C	4 ^°C	100 ^%	1014.6 hPa	2.4 ^km	SSE (150°)	13 ^km/h		0.76 mm	Rain	Rain
12:23 PM	5 ^°C	4 ^°C	93 ^%	1012.5 hPa	3.2 ^km	ESE (110°)	7.4 ^km/h		2.79 mm	Rain	Light Rain
12:42 PM	5 ^°C	4 ^°C	93 ^%	1012.9 hPa	3.2 ^km	SE (140°)	7.4 ^km/h		3.05 mm	Rain	Light Rain
12:52 PM	5 ^°C	5 ^°C	100 ^%	1012.5 hPa	3.2 ^km	ESE (110°)	7.4 ^km/h		3.05 mm		Overcast
1:52 PM	5.6 ^°C	5 ^°C	96 ^%	1012.2 hPa	3.2 ^km	SSE (160°)	7.4 ^km/h				Overcast
2:26 PM	6 ^°C	6 ^°C	100 ^%	1011.5 hPa	3.2 ^km	SSE (150°)	5.6 ^km/h				Overcast
2:52 PM	6.1 ^°C	5.6 ^°C	97 ^%	1012.2 hPa	3.2 ^km	South (170°)	11.1 ^km/h				Overcast
3:52 PM	6.7 ^°C	6.1 ^°C	96 ^%	1011.2 hPa	3.2 ^km	South (180°)	5.6 ^km/h				Overcast
3:56 PM	4 ^°C	4 ^°C	100 ^%	1012.5 hPa	16.1 ^km	WSW (250°)	27.8 ^km/h	46.3 ^km/h			Overcast
4:52 PM	6.7 ^°C	6.1 ^°C	96 ^%	1011.9 hPa	3.2 ^km	SSW (210°)	5.6 ^km/h				Overcast
5:35 PM	6 ^°C	6 ^°C	100 ^%	1011.5 hPa	3.2 ^km	Calm					Overcast
5:52 PM	6.1 ^°C	6.1 ^°C	100 ^%	1012.2 hPa	1.9 ^km	SW (220°)	5.6 ^km/h				Overcast
6:52 PM	6 ^°C	6 ^°C	100 ^%	1012.5 hPa	1.9 ^km	Calm					Overcast
7:46 PM	6 ^°C	6 ^°C	100 ^%	1012.5 hPa	0.8 ^km	Calm					Overcast
7:52 PM	6.1 ^°C	6.1 ^°C	100 ^%	1012.9 hPa	0.8 ^km	Calm					Overcast
8:22 PM	6 ^°C	6 ^°C	100 ^%	1012.5 hPa	0.8 ^km	Calm					Overcast
8:52 PM	6.1 ^°C	5.6 ^°C	97 ^%	1012.9 hPa	0.8 ^km	Calm					Overcast
9:25 PM	6 ^°C	6 ^°C	100 ^%	1012.5 hPa	3.2 ^km	Calm					Overcast
9:52 PM	5.6 ^°C	5.6 ^°C	100 ^%	1012.9 hPa	4.8 ^km	WSW (240°)	5.6 ^km/h				Overcast
10:41 PM	6 ^°C	6 ^°C	100 ^%	1012.9 hPa	4 ^km	Calm					Overcast
10:52 PM	5.6 ^°C	5.6 ^°C	100 ^%	1013.2 hPa	0.8 ^km	Calm					Overcast
11:52 PM	5 ^°C	5 ^°C	100 ^%	1013.2 hPa	0.2 ^km	Calm				Fog	Fog

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