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 - 19 AUGUST, 2014

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	23.3 ^°C	27.8 ^°C (1:52 pm)	20.6 ^°C (12:52 am)
Dewpoint	19.1 ^°C	21 ^°C (12:29 am)	17.8 ^°C (1:52 am)
Humidity	77.6 ^%	90 ^% (3:52 am)	61 ^% (9:52 am)
Barometer	1011.2 ^hPa	1013.2 hPa (5:52 pm)	1009.5 hPa (5:52 pm)
Wind Speed	9.7 ^km/h	16.7 ^km/h (12:52 pm)
Wind Gust		48.1 ^km/h (2:52 pm)

Weather Element	Average
Visibility	16.1 ^km
Wind Direction	E (87.5 °)

Weather Element	Total
Precipitation	---
Cooling Degree Days	5.9 (Base 18.3)
Growing Degree Days	14.2 (Base 10)

Averaged from 32 records on 19 August, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 19 AUGUST, 2014

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Gust Speed	Conditions
12:52 AM	22.8 ^°C	17.8 ^°C	73 ^%	1010.2 hPa	16.1 ^km	East (80°)	5.6 ^km/h		Overcast
1:52 AM	22.2 ^°C	18.3 ^°C	78 ^%	1009.8 hPa	16.1 ^km	SE (130°)	5.6 ^km/h		Overcast
2:52 AM	21.1 ^°C	18.3 ^°C	84 ^%	1009.8 hPa	16.1 ^km	Calm			Mostly Cloudy
3:52 AM	21.7 ^°C	18.9 ^°C	84 ^%	1009.5 hPa	16.1 ^km	North (360°)	5.6 ^km/h		Mostly Cloudy
4:12 AM	21 ^°C	19 ^°C	88 ^%	1009.8 hPa	16.1 ^km	North (10°)	9.3 ^km/h		Overcast
4:52 AM	21 ^°C	19 ^°C	88 ^%	1009.8 hPa	16.1 ^km	NNE (30°)	9.3 ^km/h		Mostly Cloudy
5:52 AM	20.6 ^°C	18.9 ^°C	90 ^%	1009.8 hPa	16.1 ^km	NNE (30°)	13 ^km/h		Mostly Cloudy
6:36 AM	21 ^°C	19 ^°C	88 ^%	1010.2 hPa	16.1 ^km	North (360°)	11.1 ^km/h		Mostly Cloudy
6:52 AM	20.6 ^°C	18.9 ^°C	90 ^%	1010.2 hPa	16.1 ^km	North (360°)	11.1 ^km/h		Mostly Cloudy
7:52 AM	22 ^°C	19 ^°C	83 ^%	1010.8 hPa	16.1 ^km	NE (40°)	13 ^km/h		Mostly Cloudy
8:34 AM	22 ^°C	19 ^°C	83 ^%	1011.2 hPa	16.1 ^km	NNE (30°)	13 ^km/h		Overcast
8:52 AM	21.7 ^°C	18.9 ^°C	84 ^%	1011.2 hPa	16.1 ^km	NNE (30°)	13 ^km/h		Overcast
9:03 AM	22 ^°C	19 ^°C	83 ^%	1011.5 hPa	16.1 ^km	NNE (20°)	13 ^km/h		Overcast
9:32 AM	22 ^°C	19 ^°C	83 ^%	1011.5 hPa	16.1 ^km	NE (40°)	11.1 ^km/h		Overcast
9:49 AM	22 ^°C	19 ^°C	83 ^%	1011.9 hPa	16.1 ^km	NNE (30°)	13 ^km/h		Overcast
9:52 AM	22.2 ^°C	18.9 ^°C	81 ^%	1011.5 hPa	16.1 ^km	NNE (30°)	11.1 ^km/h		Overcast
10:33 AM	23 ^°C	19 ^°C	78 ^%	1012.2 hPa	16.1 ^km	East (90°)	7.4 ^km/h		Overcast
10:52 AM	23.9 ^°C	20 ^°C	79 ^%	1011.9 hPa	16.1 ^km	East (100°)	9.3 ^km/h		Overcast
11:52 AM	24.4 ^°C	20 ^°C	76 ^%	1011.9 hPa	16.1 ^km	East (80°)	7.4 ^km/h		Overcast
12:52 PM	24.4 ^°C	20 ^°C	76 ^%	1011.9 hPa	16.1 ^km	Variable	11.1 ^km/h		Overcast
1:20 PM	25 ^°C	21 ^°C	78 ^%	1012.2 hPa	16.1 ^km	ESE (110°)	9.3 ^km/h		Mostly Cloudy
1:52 PM	26.1 ^°C	20.6 ^°C	72 ^%	1011.9 hPa	16.1 ^km	East (80°)	16.7 ^km/h		Mostly Cloudy
2:52 PM	26.7 ^°C	20 ^°C	67 ^%	1011.2 hPa	16.1 ^km	Variable	9.3 ^km/h	48.1 ^km/h	Mostly Cloudy
3:52 PM	27.8 ^°C	20 ^°C	62 ^%	1010.8 hPa	16.1 ^km	Variable	9.3 ^km/h		Mostly Cloudy
4:52 PM	27 ^°C	19 ^°C	61 ^%	1010.8 hPa	16.1 ^km	Variable	11.1 ^km/h		Scattered Clouds
5:52 PM	26.7 ^°C	18.9 ^°C	62 ^%	1011.2 hPa	16.1 ^km	ESE (120°)	13 ^km/h		Mostly Cloudy
6:52 PM	26.1 ^°C	18.9 ^°C	64 ^%	1010.8 hPa	16.1 ^km	SE (130°)	11.1 ^km/h		Mostly Cloudy
7:52 PM	25 ^°C	18.9 ^°C	69 ^%	1011.9 hPa	16.1 ^km	SE (130°)	5.6 ^km/h		Mostly Cloudy
8:52 PM	24.4 ^°C	18.9 ^°C	71 ^%	1011.9 hPa	16.1 ^km	ESE (120°)	11.1 ^km/h		Mostly Cloudy
9:52 PM	23.9 ^°C	18.9 ^°C	73 ^%	1012.5 hPa	16.1 ^km	SE (130°)	9.3 ^km/h		Overcast
10:52 PM	23.3 ^°C	18.3 ^°C	73 ^%	1012.9 hPa	16.1 ^km	SE (130°)	7.4 ^km/h		Mostly Cloudy
11:52 PM	22.8 ^°C	18.9 ^°C	79 ^%	1013.2 hPa	16.1 ^km	Calm			Mostly Cloudy

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