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 - 27 JULY, 2015

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	24.9 ^°C	28.9 ^°C (12:52 pm)	21.1 ^°C (6:52 am)
Dewpoint	20.9 ^°C	22.2 ^°C (1:52 pm)	18.9 ^°C (12:52 am)
Humidity	79.3 ^%	97 ^% (6:52 am)	65 ^% (12:52 pm)
Barometer	1015.2 ^hPa	1016.3 hPa (11:52 pm)	1014.2 hPa (2:52 am)
Wind Speed	6.1 ^km/h	22.2 ^km/h (3:18 pm)

Weather Element	Average
Visibility	14.8 ^km
Wind Direction	ESE (117.7 °)

Weather Element	Total
Precipitation	12.19 ^mm
Cooling Degree Days	6.7 (Base 18.3)
Growing Degree Days	15 (Base 10)

Averaged from 26 records on 27 July, 2015

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WEATHER BY HOUR - 27 JULY, 2015

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Precipitation	Events	Conditions
12:52 AM	25 ^°C	18.9 ^°C	69 ^%	1014.6 hPa	16.1 ^km	South (180°)	13 ^km/h			Mostly Cloudy
1:52 AM	24.4 ^°C	19.4 ^°C	74 ^%	1014.6 hPa	16.1 ^km	South (180°)	11.1 ^km/h			Mostly Cloudy
2:52 AM	24.4 ^°C	19.4 ^°C	74 ^%	1014.2 hPa	16.1 ^km	South (190°)	11.1 ^km/h			Overcast
3:52 AM	22.8 ^°C	20 ^°C	84 ^%	1014.2 hPa	9.7 ^km	SSW (210°)	9.3 ^km/h	0 mm	Rain	Rain
4:30 AM	22 ^°C	21 ^°C	94 ^%	1014.9 hPa	4.8 ^km	WSW (240°)	5.6 ^km/h	3.56 mm	Rain-Thunderstorm	Heavy Thunderstorms and Rain
4:52 AM	21.7 ^°C	20.6 ^°C	93 ^%	1014.2 hPa	11.3 ^km	SSE (160°)	11.1 ^km/h	6.86 mm	Rain	Light Rain
5:52 AM	21.7 ^°C	20.6 ^°C	93 ^%	1014.6 hPa	12.9 ^km	ESE (120°)	5.6 ^km/h	0 mm		Mostly Cloudy
6:52 AM	21.1 ^°C	20.6 ^°C	97 ^%	1014.9 hPa	14.5 ^km	Calm				Mostly Cloudy
7:52 AM	22.2 ^°C	20.6 ^°C	91 ^%	1015.6 hPa	16.1 ^km	South (180°)	5.6 ^km/h			Mostly Cloudy
8:52 AM	23.9 ^°C	20.6 ^°C	82 ^%	1015.9 hPa	16.1 ^km	Calm				Mostly Cloudy
9:52 AM	24.4 ^°C	20.6 ^°C	79 ^%	1015.9 hPa	16.1 ^km	Calm				Mostly Cloudy
10:52 AM	25.6 ^°C	21.1 ^°C	76 ^%	1015.9 hPa	16.1 ^km	Calm				Mostly Cloudy
11:52 AM	26.7 ^°C	21.1 ^°C	71 ^%	1015.6 hPa	16.1 ^km	Variable	5.6 ^km/h			Mostly Cloudy
12:52 PM	28.9 ^°C	21.7 ^°C	65 ^%	1015.6 hPa	16.1 ^km	NNW (340°)	5.6 ^km/h			Mostly Cloudy
1:52 PM	28.9 ^°C	22.2 ^°C	67 ^%	1015.2 hPa	16.1 ^km	Calm				Mostly Cloudy
2:52 PM	28.9 ^°C	22.2 ^°C	67 ^%	1014.9 hPa	16.1 ^km	South (170°)	5.6 ^km/h			Overcast
3:18 PM	25 ^°C	21 ^°C	78 ^%	1015.6 hPa	8 ^km	South (170°)	22.2 ^km/h	0.25 mm	Rain-Thunderstorm	Light Thunderstorms and Rain
3:52 PM	25.6 ^°C	21.7 ^°C	79 ^%	1015.2 hPa	16.1 ^km	SSW (200°)	5.6 ^km/h	1.52 mm	Rain-Thunderstorm	Light Thunderstorms and Rain
4:52 PM	25.6 ^°C	20.6 ^°C	74 ^%	1014.6 hPa	16.1 ^km	SSE (160°)	9.3 ^km/h	0 mm		Scattered Clouds
5:52 PM	27.8 ^°C	20.6 ^°C	65 ^%	1014.6 hPa	16.1 ^km	SW (220°)	9.3 ^km/h			Scattered Clouds
6:52 PM	27.8 ^°C	21.7 ^°C	69 ^%	1014.6 hPa	16.1 ^km	Calm				Scattered Clouds
7:52 PM	26.1 ^°C	22.2 ^°C	79 ^%	1014.9 hPa	16.1 ^km	East (90°)	11.1 ^km/h			Mostly Cloudy
8:52 PM	24.4 ^°C	21.7 ^°C	85 ^%	1015.2 hPa	16.1 ^km	ESE (120°)	5.6 ^km/h			Mostly Cloudy
9:52 PM	24.4 ^°C	21.7 ^°C	85 ^%	1015.9 hPa	16.1 ^km	SE (130°)	5.6 ^km/h			Partly Cloudy
10:52 PM	24.4 ^°C	21.1 ^°C	82 ^%	1015.9 hPa	16.1 ^km	Calm				Scattered Clouds
11:52 PM	22.8 ^°C	21.1 ^°C	90 ^%	1016.3 hPa	16.1 ^km	Calm				Scattered Clouds

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