HERNDON, VIRGINIA

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Elevation: 322 feet 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 - DECEMBER 19, 2014

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[ °C ] °F

Weather Element	Average	High	Low
Temperature	33.1 ^°F	37 ^°F (1:52 pm)	28.9 ^°F (11:52 pm)
Dewpoint	21.9 ^°F	23 ^°F (12:52 am)	21 ^°F (7:52 am)
Humidity	63.8 ^%	72 ^% (6:52 pm)	54 ^% (2:52 pm)
Barometer	30.18 ⁱⁿ	30.27 ⁱⁿ (10:52 pm)	30.12 ⁱⁿ (12:52 am)
Wind Speed	10.1 ^mph	15 ^mph (1:52 pm)

Weather Element	Average
Visibility	10 ^mi
Wind Direction	WNW (306.3 °)

Weather Element	Total
Precipitation	---
Heating Degree Days	32.1 (Base 65)

Averaged from 24 records on December 19, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - DECEMBER 19, 2014

[ °C ] °F

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Conditions
12:52 AM	32.0 ^°F	23.0 ^°F	69 ^%	30.12 ⁱⁿ	10.0 ^mi	West (270°)	5.8 ^mph	Mostly Cloudy
1:52 AM	32.0 ^°F	21.9 ^°F	66 ^%	30.12 ⁱⁿ	10.0 ^mi	WNW (290°)	10.4 ^mph	Mostly Cloudy
2:52 AM	32.0 ^°F	21.9 ^°F	66 ^%	30.13 ⁱⁿ	10.0 ^mi	WNW (290°)	6.9 ^mph	Overcast
3:52 AM	32.0 ^°F	21.9 ^°F	66 ^%	30.12 ⁱⁿ	10.0 ^mi	WNW (300°)	8.1 ^mph	Overcast
4:52 AM	32.0 ^°F	21.9 ^°F	66 ^%	30.12 ⁱⁿ	10.0 ^mi	NW (310°)	8.1 ^mph	Overcast
5:52 AM	32.0 ^°F	21.9 ^°F	66 ^%	30.13 ⁱⁿ	10.0 ^mi	WNW (300°)	10.4 ^mph	Mostly Cloudy
6:52 AM	33.1 ^°F	21.9 ^°F	64 ^%	30.14 ⁱⁿ	10.0 ^mi	WNW (300°)	12.7 ^mph	Mostly Cloudy
7:52 AM	33.1 ^°F	21.0 ^°F	61 ^%	30.17 ⁱⁿ	10.0 ^mi	WNW (300°)	13.8 ^mph	Mostly Cloudy
8:52 AM	34.0 ^°F	21.9 ^°F	61 ^%	30.17 ⁱⁿ	10.0 ^mi	NW (320°)	13.8 ^mph	Mostly Cloudy
9:52 AM	35.1 ^°F	21.9 ^°F	59 ^%	30.18 ⁱⁿ	10.0 ^mi	NW (320°)	12.7 ^mph	Overcast
10:52 AM	35.1 ^°F	23.0 ^°F	61 ^%	30.19 ⁱⁿ	10.0 ^mi	NW (310°)	12.7 ^mph	Overcast
11:52 AM	36.0 ^°F	23.0 ^°F	59 ^%	30.17 ⁱⁿ	10.0 ^mi	NW (310°)	10.4 ^mph	Overcast
12:52 PM	36.0 ^°F	23.0 ^°F	59 ^%	30.16 ⁱⁿ	10.0 ^mi	WNW (300°)	11.5 ^mph	Overcast
1:52 PM	37.0 ^°F	23.0 ^°F	57 ^%	30.13 ⁱⁿ	10.0 ^mi	NW (320°)	15.0 ^mph	Mostly Cloudy
2:52 PM	37.0 ^°F	21.9 ^°F	54 ^%	30.16 ⁱⁿ	10.0 ^mi	WNW (300°)	15.0 ^mph	Mostly Cloudy
3:52 PM	37.0 ^°F	21.9 ^°F	54 ^%	30.17 ⁱⁿ	10.0 ^mi	NW (310°)	13.8 ^mph	Scattered Clouds
4:52 PM	35.1 ^°F	21.9 ^°F	59 ^%	30.19 ⁱⁿ	10.0 ^mi	WNW (300°)	11.5 ^mph	Scattered Clouds
5:52 PM	33.1 ^°F	21.9 ^°F	64 ^%	30.20 ⁱⁿ	10.0 ^mi	West (280°)	10.4 ^mph	Partly Cloudy
6:52 PM	30.0 ^°F	21.9 ^°F	72 ^%	30.23 ⁱⁿ	10.0 ^mi	WNW (290°)	6.9 ^mph	Clear
7:52 PM	30.9 ^°F	21.9 ^°F	69 ^%	30.23 ⁱⁿ	10.0 ^mi	NNW (330°)	8.1 ^mph	Clear
8:52 PM	30.0 ^°F	21.0 ^°F	69 ^%	30.25 ⁱⁿ	10.0 ^mi	NW (320°)	6.9 ^mph	Clear
9:52 PM	30.0 ^°F	21.0 ^°F	69 ^%	30.26 ⁱⁿ	10.0 ^mi	NNW (330°)	6.9 ^mph	Clear
10:52 PM	30.0 ^°F	21.0 ^°F	69 ^%	30.27 ⁱⁿ	10.0 ^mi	NW (320°)	4.6 ^mph	Clear
11:52 PM	28.9 ^°F	21.0 ^°F	72 ^%	30.26 ⁱⁿ	10.0 ^mi	NNW (330°)	6.9 ^mph	Clear

Hourly data recorded from KIAD, located miles away from Herndon, Virginia