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 - MAY 21, 2015

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[ °C ] °F

Weather Element	Average	High	Low
Temperature	53.1 ^°F	57.9 ^°F (1:52 am)	50 ^°F (12:52 pm)
Dewpoint	47.5 ^°F	50 ^°F (10:21 am)	41 ^°F (1:52 am)
Humidity	82.2 ^%	94 ^% (10:52 am)	53 ^% (1:52 am)
Barometer	29.98 ⁱⁿ	30.02 ⁱⁿ (9:52 am)	29.92 ⁱⁿ (5:52 pm)
Wind Speed	4 ^mph	10.4 ^mph (11:52 am)

Weather Element	Average
Visibility	7.7 ^mi
Wind Direction	ENE (82.1 °)

Weather Element	Total
Precipitation	0.54 ⁱⁿ
Heating Degree Days	11.1 (Base 65)
Growing Degree Days	4 (Base 50)

Averaged from 34 records on May 21, 2015

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - MAY 21, 2015

[ °C ] °F

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Precipitation	Events	Conditions
12:52 AM	57.0 ^°F	43.0 ^°F	59 ^%	30.01 ⁱⁿ	10.0 ^mi	NE (40°)	3.5 ^mph			Overcast
1:52 AM	57.9 ^°F	41.0 ^°F	53 ^%	30.00 ⁱⁿ	10.0 ^mi	Calm				Overcast
2:52 AM	55.9 ^°F	46.9 ^°F	72 ^%	30.00 ⁱⁿ	10.0 ^mi	Calm				Overcast
3:52 AM	55.9 ^°F	46.9 ^°F	72 ^%	30.00 ⁱⁿ	10.0 ^mi	Calm				Overcast
4:52 AM	55.9 ^°F	46.0 ^°F	69 ^%	29.99 ⁱⁿ	10.0 ^mi	Calm				Overcast
5:52 AM	57.0 ^°F	43.0 ^°F	59 ^%	29.98 ⁱⁿ	10.0 ^mi	ENE (60°)	4.6 ^mph			Overcast
6:52 AM	57.0 ^°F	43.0 ^°F	59 ^%	29.98 ⁱⁿ	10.0 ^mi	East (80°)	3.5 ^mph	0.00 ⁱⁿ		Overcast
7:52 AM	57.0 ^°F	46.0 ^°F	67 ^%	29.99 ⁱⁿ	10.0 ^mi	Calm		0.00 ⁱⁿ	Rain	Light Rain
8:52 AM	55.0 ^°F	48.9 ^°F	80 ^%	30.00 ⁱⁿ	4.0 ^mi	Calm		0.01 ⁱⁿ	Rain	Rain
9:52 AM	53.1 ^°F	48.0 ^°F	83 ^%	30.02 ⁱⁿ	5.0 ^mi	NE (40°)	3.5 ^mph	0.03 ⁱⁿ	Rain	Light Rain
10:21 AM	53.6 ^°F	50.0 ^°F	88 ^%	30.02 ⁱⁿ	2.5 ^mi	SW (230°)	5.8 ^mph	0.01 ⁱⁿ	Rain	Rain
10:47 AM	51.8 ^°F	48.2 ^°F	88 ^%	30.02 ⁱⁿ	3.0 ^mi	WNW (300°)	3.5 ^mph	0.06 ⁱⁿ	Rain	Light Rain
10:50 AM	51.8 ^°F	48.2 ^°F	88 ^%	30.02 ⁱⁿ	2.5 ^mi	Calm		0.07 ⁱⁿ	Rain	Rain
10:52 AM	51.8 ^°F	50.0 ^°F	94 ^%	30.02 ⁱⁿ	2.5 ^mi	Calm			Rain	Rain
11:07 AM	51.8 ^°F	48.2 ^°F	88 ^%	30.02 ⁱⁿ	2.5 ^mi	SSE (150°)	3.5 ^mph	0.02 ⁱⁿ	Rain	Light Rain
11:25 AM	51.8 ^°F	50.0 ^°F	94 ^%	30.02 ⁱⁿ	2.5 ^mi	Calm		0.06 ⁱⁿ	Rain	Rain
11:44 AM	51.8 ^°F	48.2 ^°F	88 ^%	30.01 ⁱⁿ	6.0 ^mi	East (80°)	9.2 ^mph	0.08 ⁱⁿ	Rain	Light Rain
11:52 AM	51.1 ^°F	46.9 ^°F	86 ^%	30.01 ⁱⁿ	6.0 ^mi	East (80°)	10.4 ^mph	0.08 ⁱⁿ	Rain	Light Rain
12:22 PM	51.8 ^°F	48.2 ^°F	88 ^%	30.00 ⁱⁿ	7.0 ^mi	ENE (60°)	8.1 ^mph	0.00 ⁱⁿ	Rain	Light Rain
12:38 PM	51.8 ^°F	48.2 ^°F	88 ^%	29.99 ⁱⁿ	7.0 ^mi	ENE (70°)	10.4 ^mph	0.01 ⁱⁿ	Rain	Light Rain
12:52 PM	50.0 ^°F	46.9 ^°F	89 ^%	29.99 ⁱⁿ	6.0 ^mi	ENE (70°)	10.4 ^mph	0.02 ⁱⁿ	Rain	Light Rain
1:28 PM	51.8 ^°F	48.2 ^°F	88 ^%	29.97 ⁱⁿ	7.0 ^mi	East (90°)	8.1 ^mph	0.04 ⁱⁿ	Rain	Light Rain
1:52 PM	51.1 ^°F	48.0 ^°F	89 ^%	29.97 ⁱⁿ	8.0 ^mi	East (80°)	8.1 ^mph	0.05 ⁱⁿ		Overcast
2:52 PM	51.1 ^°F	48.0 ^°F	89 ^%	29.96 ⁱⁿ	10.0 ^mi	East (80°)	6.9 ^mph	0.00 ⁱⁿ		Overcast
3:52 PM	52.0 ^°F	48.0 ^°F	86 ^%	29.94 ⁱⁿ	10.0 ^mi	East (80°)	3.5 ^mph			Overcast
4:52 PM	52.0 ^°F	48.0 ^°F	86 ^%	29.93 ⁱⁿ	10.0 ^mi	East (90°)	3.5 ^mph			Overcast
5:52 PM	53.1 ^°F	48.9 ^°F	86 ^%	29.92 ⁱⁿ	10.0 ^mi	ENE (60°)	4.6 ^mph			Overcast
6:13 PM	51.8 ^°F	48.2 ^°F	88 ^%	29.93 ⁱⁿ	10.0 ^mi	NE (50°)	4.6 ^mph			Overcast
6:52 PM	52.0 ^°F	48.9 ^°F	89 ^%	29.94 ⁱⁿ	10.0 ^mi	East (90°)	3.5 ^mph			Overcast
7:52 PM	52.0 ^°F	48.9 ^°F	89 ^%	29.95 ⁱⁿ	10.0 ^mi	Calm				Overcast
8:52 PM	52.0 ^°F	48.9 ^°F	89 ^%	29.95 ⁱⁿ	10.0 ^mi	Calm				Mostly Cloudy
9:52 PM	53.1 ^°F	48.0 ^°F	83 ^%	29.96 ⁱⁿ	10.0 ^mi	NW (320°)	5.8 ^mph			Mostly Cloudy
10:52 PM	52.0 ^°F	48.9 ^°F	89 ^%	29.97 ⁱⁿ	10.0 ^mi	WNW (290°)	3.5 ^mph			Mostly Cloudy
11:52 PM	51.1 ^°F	48.9 ^°F	92 ^%	29.97 ⁱⁿ	10.0 ^mi	WNW (300°)	8.1 ^mph			Scattered Clouds

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