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 - 15 DECEMBER, 2014

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	6.6 ^°C	13.9 ^°C (2:52 pm)	1.7 ^°C (11:52 pm)
Dewpoint	2.9 ^°C	4.4 ^°C (10:52 am)	0.6 ^°C (12:52 am)
Humidity	79.2 ^%	100 ^% (11:52 pm)	53 ^% (2:52 pm)
Barometer	1018.3 ^hPa	1019.6 hPa (9:52 am)	1016.9 hPa (12:52 am)
Wind Speed	3.7 ^km/h	14.8 ^km/h (3:52 pm)

Weather Element	Average
Visibility	15.8 ^km
Wind Direction	E (88.5 °)

Weather Element	Total
Precipitation	---
Heating Degree Days	10.6 (Base 18.3)

Averaged from 26 records on 15 December, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 15 DECEMBER, 2014

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Conditions
12:52 AM	2.2 ^°C	0.6 ^°C	89 ^%	1016.9 hPa	16.1 ^km	Calm		Clear
1:52 AM	2.2 ^°C	1.1 ^°C	93 ^%	1017.6 hPa	16.1 ^km	Calm		Partly Cloudy
2:52 AM	2.8 ^°C	1.1 ^°C	89 ^%	1017.9 hPa	16.1 ^km	Calm		Mostly Cloudy
3:52 AM	2.8 ^°C	1.7 ^°C	93 ^%	1017.9 hPa	16.1 ^km	Calm		Overcast
4:18 AM	3 ^°C	2 ^°C	93 ^%	1017.9 hPa	16.1 ^km	Calm		Overcast
4:52 AM	3.9 ^°C	2.2 ^°C	89 ^%	1018.6 hPa	16.1 ^km	South (190°)	5.6 ^km/h	Overcast
5:52 AM	4.4 ^°C	2.8 ^°C	89 ^%	1019 hPa	16.1 ^km	Calm		Overcast
6:52 AM	4.4 ^°C	2.8 ^°C	89 ^%	1019 hPa	16.1 ^km	SW (220°)	5.6 ^km/h	Overcast
7:30 AM	4 ^°C	3 ^°C	93 ^%	1019 hPa	16.1 ^km	Calm		Overcast
7:52 AM	4.4 ^°C	2.8 ^°C	89 ^%	1019.3 hPa	16.1 ^km	SSW (200°)	7.4 ^km/h	Overcast
8:52 AM	6.1 ^°C	3.3 ^°C	82 ^%	1019.3 hPa	16.1 ^km	SSE (160°)	5.6 ^km/h	Overcast
9:52 AM	8.3 ^°C	3.9 ^°C	74 ^%	1019.6 hPa	16.1 ^km	SW (220°)	5.6 ^km/h	Mostly Cloudy
10:52 AM	11.7 ^°C	4.4 ^°C	61 ^%	1019.6 hPa	16.1 ^km	NNW (340°)	11.1 ^km/h	Mostly Cloudy
11:52 AM	12.8 ^°C	4.4 ^°C	57 ^%	1018.3 hPa	16.1 ^km	Variable	5.6 ^km/h	Partly Cloudy
12:52 PM	13.3 ^°C	4.4 ^°C	55 ^%	1017.6 hPa	16.1 ^km	Calm		Partly Cloudy
1:52 PM	13.3 ^°C	4.4 ^°C	55 ^%	1016.9 hPa	16.1 ^km	Calm		Partly Cloudy
2:52 PM	13.9 ^°C	4.4 ^°C	53 ^%	1016.9 hPa	16.1 ^km	Calm		Partly Cloudy
3:52 PM	12.8 ^°C	4.4 ^°C	57 ^%	1017.3 hPa	16.1 ^km	South (190°)	14.8 ^km/h	Partly Cloudy
4:52 PM	10.6 ^°C	3.3 ^°C	61 ^%	1017.3 hPa	16.1 ^km	South (190°)	7.4 ^km/h	Partly Cloudy
5:52 PM	7.8 ^°C	3.3 ^°C	73 ^%	1017.9 hPa	16.1 ^km	SSW (210°)	7.4 ^km/h	Scattered Clouds
6:52 PM	5.6 ^°C	2.8 ^°C	82 ^%	1017.9 hPa	16.1 ^km	SE (140°)	5.6 ^km/h	Scattered Clouds
7:52 PM	6.1 ^°C	2.8 ^°C	80 ^%	1018.6 hPa	16.1 ^km	Calm		Clear
8:52 PM	3.9 ^°C	2.2 ^°C	89 ^%	1018.3 hPa	16.1 ^km	ESE (120°)	5.6 ^km/h	Mostly Cloudy
9:52 PM	5 ^°C	2.8 ^°C	86 ^%	1017.9 hPa	16.1 ^km	ESE (120°)	7.4 ^km/h	Mostly Cloudy
10:52 PM	5 ^°C	3.3 ^°C	89 ^%	1017.9 hPa	14.5 ^km	Calm		Mostly Cloudy
11:52 PM	1.7 ^°C	1.7 ^°C	100 ^%	1017.9 hPa	11.3 ^km	Calm		Mostly Cloudy

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