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 - SEPTEMBER 1, 2015

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[ °C ] °F

Weather Element	Average	High	Low
Temperature	76.7 ^°F	91.9 ^°F (12:52 pm)	64.4 ^°F (7:09 am)
Dewpoint	66.3 ^°F	68 ^°F (12:52 am)	63 ^°F (4:52 pm)
Humidity	74.3 ^%	100 ^% (4:30 am)	39 ^% (3:52 pm)
Barometer	30.05 ⁱⁿ	30.09 ⁱⁿ (10:52 am)	30.00 ⁱⁿ (5:52 pm)
Wind Speed	3.4 ^mph	9.2 ^mph (11:52 am)

Weather Element	Average
Visibility	8.8 ^mi
Wind Direction	ESE (129.3 °)

Weather Element	Total
Precipitation	---
Cooling Degree Days	13.2 (Base 65)
Growing Degree Days	28.2 (Base 50)

Averaged from 30 records on September 1, 2015

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - SEPTEMBER 1, 2015

[ °C ] °F

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Events	Conditions
12:52 AM	72.0 ^°F	68.0 ^°F	87 ^%	30.06 ⁱⁿ	10.0 ^mi	SSW (200°)	5.8 ^mph		Clear
1:52 AM	71.1 ^°F	68.0 ^°F	90 ^%	30.05 ⁱⁿ	10.0 ^mi	South (190°)	6.9 ^mph		Clear
2:52 AM	70.0 ^°F	68.0 ^°F	93 ^%	30.04 ⁱⁿ	10.0 ^mi	South (180°)	4.6 ^mph		Clear
3:52 AM	69.1 ^°F	66.9 ^°F	93 ^%	30.04 ⁱⁿ	10.0 ^mi	Calm			Clear
4:30 AM	66.2 ^°F	66.2 ^°F	100 ^%	30.05 ⁱⁿ	1.5 ^mi	Calm			Clear
4:32 AM	66.2 ^°F	66.2 ^°F	100 ^%	30.05 ⁱⁿ	0.8 ^mi	Calm			Clear
4:36 AM	66.2 ^°F	66.2 ^°F	100 ^%	30.05 ⁱⁿ	10.0 ^mi	Calm			Clear
4:52 AM	66.9 ^°F	66.0 ^°F	97 ^%	30.04 ⁱⁿ	10.0 ^mi	Calm			Clear
5:52 AM	66.0 ^°F	64.9 ^°F	96 ^%	30.04 ⁱⁿ	10.0 ^mi	Calm			Clear
6:27 AM	66.2 ^°F	66.2 ^°F	100 ^%	30.05 ⁱⁿ	6.0 ^mi	Calm		Fog	Patches of Fog
6:32 AM	66.2 ^°F	66.2 ^°F	100 ^%	30.06 ⁱⁿ	5.0 ^mi	Calm		Fog	Shallow Fog
6:52 AM	64.9 ^°F	64.9 ^°F	100 ^%	30.06 ⁱⁿ	5.0 ^mi	Calm			Clear
7:09 AM	64.4 ^°F	64.4 ^°F	100 ^%	30.07 ⁱⁿ	9.0 ^mi	Calm			Clear
7:52 AM	71.1 ^°F	68.0 ^°F	90 ^%	30.07 ⁱⁿ	10.0 ^mi	NW (310°)	3.5 ^mph		Clear
8:52 AM	77.0 ^°F	66.9 ^°F	71 ^%	30.08 ⁱⁿ	10.0 ^mi	NNW (330°)	5.8 ^mph		Clear
9:52 AM	81.0 ^°F	66.9 ^°F	62 ^%	30.08 ⁱⁿ	10.0 ^mi	NW (320°)	6.9 ^mph		Partly Cloudy
10:52 AM	86.0 ^°F	66.9 ^°F	53 ^%	30.09 ⁱⁿ	10.0 ^mi	North (350°)	8.1 ^mph		Partly Cloudy
11:52 AM	88.0 ^°F	66.9 ^°F	49 ^%	30.08 ⁱⁿ	10.0 ^mi	North (350°)	9.2 ^mph		Partly Cloudy
12:52 PM	91.9 ^°F	66.9 ^°F	44 ^%	30.06 ⁱⁿ	10.0 ^mi	NNW (330°)	5.8 ^mph		Scattered Clouds
1:52 PM	89.1 ^°F	66.0 ^°F	46 ^%	30.06 ⁱⁿ	10.0 ^mi	NNW (330°)	9.2 ^mph		Scattered Clouds
2:52 PM	91.0 ^°F	66.0 ^°F	44 ^%	30.04 ⁱⁿ	10.0 ^mi	NW (320°)	9.2 ^mph		Scattered Clouds
3:52 PM	91.9 ^°F	64.0 ^°F	39 ^%	30.02 ⁱⁿ	10.0 ^mi	Variable	5.8 ^mph		Mostly Cloudy
4:52 PM	91.0 ^°F	63.0 ^°F	39 ^%	30.01 ⁱⁿ	10.0 ^mi	WNW (300°)	6.9 ^mph		Mostly Cloudy
5:52 PM	90.0 ^°F	64.0 ^°F	42 ^%	30.00 ⁱⁿ	10.0 ^mi	Variable	3.5 ^mph		Mostly Cloudy
6:52 PM	88.0 ^°F	64.9 ^°F	46 ^%	30.01 ⁱⁿ	10.0 ^mi	NW (320°)	5.8 ^mph		Mostly Cloudy
7:52 PM	82.9 ^°F	66.0 ^°F	56 ^%	30.01 ⁱⁿ	9.0 ^mi	Calm			Mostly Cloudy
8:52 PM	78.1 ^°F	66.9 ^°F	68 ^%	30.04 ⁱⁿ	9.0 ^mi	Calm			Mostly Cloudy
9:52 PM	75.9 ^°F	66.9 ^°F	74 ^%	30.04 ⁱⁿ	9.0 ^mi	Calm			Scattered Clouds
10:52 PM	80.1 ^°F	68.0 ^°F	67 ^%	30.05 ⁱⁿ	10.0 ^mi	NE (50°)	3.5 ^mph		Mostly Cloudy
11:52 PM	73.9 ^°F	68.0 ^°F	82 ^%	30.05 ⁱⁿ	9.0 ^mi	Calm			Mostly Cloudy

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