DULLES, VIRGINIA

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Elevation: 88 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 - 20 SEPTEMBER, 2014

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	19.6 ^°C	26 ^°C (4:52 pm)	12.8 ^°C (6:52 am)
Dewpoint	14.6 ^°C	16.1 ^°C (8:52 am)	12.8 ^°C (6:52 am)
Humidity	75.9 ^%	100 ^% (5:52 am)	44 ^% (4:52 pm)
Barometer	1022 ^hPa	1025.1 hPa (1:52 am)	1017.6 hPa (7:52 pm)
Wind Speed	7.9 ^km/h	16.7 ^km/h (1:52 pm)
Wind Gust		25.9 ^km/h (2:52 pm)

Weather Element	Average
Visibility	14.3 ^km
Wind Direction	ESE (105.6 °)

Weather Element	Total
Precipitation	---
Cooling Degree Days	1.1 (Base 18.3)
Growing Degree Days	9.4 (Base 10)

Averaged from 25 records on 20 September, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 20 SEPTEMBER, 2014

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Gust Speed	Events	Conditions
1:52 AM	17.2 ^°C	15.6 ^°C	90 ^%	1025.1 hPa	16.1 ^km	ESE (120°)	14.8 ^km/h			Overcast
2:52 AM	17.2 ^°C	15.6 ^°C	90 ^%	1024.7 hPa	16.1 ^km	SE (140°)	13 ^km/h			Overcast
3:52 AM	16.7 ^°C	15.6 ^°C	93 ^%	1024.4 hPa	16.1 ^km	SE (140°)	7.4 ^km/h			Overcast
4:52 AM	16.1 ^°C	15 ^°C	93 ^%	1024.4 hPa	16.1 ^km	Calm				Mostly Cloudy
5:52 AM	13.9 ^°C	13.9 ^°C	100 ^%	1024.7 hPa	9.7 ^km	Calm				Partly Cloudy
6:52 AM	12.8 ^°C	12.8 ^°C	100 ^%	1024.7 hPa	11.3 ^km	Calm			Fog	Shallow Fog
7:52 AM	14.4 ^°C	14.4 ^°C	100 ^%	1024.7 hPa	6.4 ^km	Calm				Partly Cloudy
8:40 AM	17 ^°C	16 ^°C	94 ^%	1025.1 hPa	8 ^km	Calm				Mostly Cloudy
8:52 AM	17.2 ^°C	16.1 ^°C	93 ^%	1024.7 hPa	8 ^km	West (260°)	5.6 ^km/h			Mostly Cloudy
9:28 AM	18 ^°C	16 ^°C	88 ^%	1025.1 hPa	11.3 ^km	South (190°)	5.6 ^km/h			Scattered Clouds
9:52 AM	18.3 ^°C	15.6 ^°C	84 ^%	1025.1 hPa	12.9 ^km	Calm				Scattered Clouds
10:52 AM	21.1 ^°C	15.6 ^°C	71 ^%	1024 hPa	16.1 ^km	South (190°)	11.1 ^km/h			Partly Cloudy
11:52 AM	22.8 ^°C	13.9 ^°C	57 ^%	1023.7 hPa	16.1 ^km	Variable	11.1 ^km/h			Partly Cloudy
12:52 PM	23.9 ^°C	13.3 ^°C	51 ^%	1022.4 hPa	16.1 ^km	Variable	7.4 ^km/h			Partly Cloudy
1:52 PM	25 ^°C	13.9 ^°C	50 ^%	1021.3 hPa	16.1 ^km	South (190°)	16.7 ^km/h			Partly Cloudy
2:52 PM	25.6 ^°C	13.9 ^°C	48 ^%	1020.3 hPa	16.1 ^km	SE (140°)	11.1 ^km/h	25.9 ^km/h		Scattered Clouds
3:52 PM	25.6 ^°C	13.3 ^°C	46 ^%	1019.3 hPa	16.1 ^km	SSE (150°)	16.7 ^km/h			Scattered Clouds
4:52 PM	26 ^°C	13 ^°C	44 ^%	1019.3 hPa	16.1 ^km	SE (140°)	16.7 ^km/h			Scattered Clouds
5:52 PM	24.4 ^°C	12.8 ^°C	48 ^%	1018.6 hPa	16.1 ^km	SSE (150°)	14.8 ^km/h			Scattered Clouds
6:52 PM	22.8 ^°C	13.9 ^°C	57 ^%	1017.9 hPa	16.1 ^km	SSE (160°)	11.1 ^km/h			Scattered Clouds
7:52 PM	21.1 ^°C	14.4 ^°C	65 ^%	1017.6 hPa	16.1 ^km	SSE (150°)	9.3 ^km/h			Partly Cloudy
8:52 PM	20.6 ^°C	15 ^°C	70 ^%	1017.6 hPa	16.1 ^km	SSE (150°)	13 ^km/h			Partly Cloudy
9:52 PM	19.4 ^°C	15.6 ^°C	79 ^%	1017.6 hPa	16.1 ^km	SSE (160°)	7.4 ^km/h			Partly Cloudy
10:52 PM	17.2 ^°C	15.6 ^°C	90 ^%	1018.3 hPa	16.1 ^km	SSW (210°)	5.6 ^km/h			Clear
11:52 PM	15.6 ^°C	15 ^°C	96 ^%	1018.3 hPa	16.1 ^km	Calm				Clear

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