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 - 31 JANUARY, 2015

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	-5.1 ^°C	0.6 ^°C (2:52 pm)	-8.9 ^°C (6:52 am)
Dewpoint	-14.2 ^°C	-10.6 ^°C (8:52 pm)	-17.2 ^°C (8:52 am)
Humidity	50.8 ^%	74 ^% (9:52 pm)	35 ^% (3:52 pm)
Barometer	1026.1 ^hPa	1028.1 hPa (10:52 am)	1025.1 hPa (3:52 pm)
Wind Speed	15 ^km/h	27.8 ^km/h (3:52 am)
Wind Gust		44.4 ^km/h (10:52 am)

Weather Element	Average
Visibility	16.1 ^km
Wind Direction	WSW (235.4 °)

Weather Element	Total
Precipitation	---
Heating Degree Days	22.5 (Base 18.3)

Averaged from 24 records on 31 January, 2015

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 31 JANUARY, 2015

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Gust Speed	Conditions
12:52 AM	-7.8 ^°C	-16.1 ^°C	52 ^%	1025.7 hPa	16.1 ^km	NW (320°)	24.1 ^km/h	38.9 ^km/h	Clear
1:52 AM	-7.8 ^°C	-16.7 ^°C	50 ^%	1026.1 hPa	16.1 ^km	NNW (330°)	25.9 ^km/h	42.6 ^km/h	Clear
2:52 AM	-7.8 ^°C	-16.1 ^°C	52 ^%	1026.4 hPa	16.1 ^km	NNW (330°)	14.8 ^km/h	31.5 ^km/h	Partly Cloudy
3:52 AM	-7.8 ^°C	-16.1 ^°C	52 ^%	1026.4 hPa	16.1 ^km	NNW (330°)	27.8 ^km/h	37 ^km/h	Clear
4:52 AM	-8.3 ^°C	-16.1 ^°C	54 ^%	1026.1 hPa	16.1 ^km	NNW (340°)	20.4 ^km/h	37 ^km/h	Clear
5:52 AM	-8.3 ^°C	-16.7 ^°C	52 ^%	1026.1 hPa	16.1 ^km	NW (320°)	18.5 ^km/h		Clear
6:52 AM	-8.9 ^°C	-16.7 ^°C	54 ^%	1026.8 hPa	16.1 ^km	NW (320°)	13 ^km/h		Clear
7:52 AM	-7.8 ^°C	-16.7 ^°C	50 ^%	1027.4 hPa	16.1 ^km	WNW (300°)	27.8 ^km/h	35.2 ^km/h	Clear
8:52 AM	-6.1 ^°C	-17.2 ^°C	42 ^%	1027.4 hPa	16.1 ^km	NW (320°)	22.2 ^km/h		Clear
9:52 AM	-6 ^°C	-17 ^°C	42 ^%	1027.8 hPa	16.1 ^km	NNW (330°)	24.1 ^km/h		Clear
10:52 AM	-4.4 ^°C	-16.1 ^°C	40 ^%	1028.1 hPa	16.1 ^km	NNW (330°)	27.8 ^km/h	44.4 ^km/h	Clear
11:52 AM	-3.3 ^°C	-15 ^°C	41 ^%	1027.8 hPa	16.1 ^km	NNW (330°)	24.1 ^km/h		Clear
12:52 PM	-2.2 ^°C	-13.9 ^°C	41 ^%	1026.4 hPa	16.1 ^km	NNW (330°)	20.4 ^km/h		Clear
1:52 PM	-0.6 ^°C	-13.3 ^°C	38 ^%	1026.1 hPa	16.1 ^km	WNW (290°)	16.7 ^km/h	27.8 ^km/h	Clear
2:52 PM	0.6 ^°C	-12.8 ^°C	37 ^%	1025.4 hPa	16.1 ^km	NW (310°)	18.5 ^km/h		Partly Cloudy
3:52 PM	0.6 ^°C	-13.3 ^°C	35 ^%	1025.1 hPa	16.1 ^km	NW (310°)	16.7 ^km/h		Partly Cloudy
4:52 PM	0.6 ^°C	-12.2 ^°C	38 ^%	1025.1 hPa	16.1 ^km	NW (310°)	11.1 ^km/h		Partly Cloudy
5:52 PM	-1.1 ^°C	-12.8 ^°C	41 ^%	1025.4 hPa	16.1 ^km	Calm			Partly Cloudy
6:52 PM	-3.9 ^°C	-11.7 ^°C	55 ^%	1025.7 hPa	16.1 ^km	SSW (200°)	5.6 ^km/h		Partly Cloudy
7:52 PM	-5 ^°C	-11.1 ^°C	63 ^%	1025.7 hPa	16.1 ^km	Calm			Partly Cloudy
8:52 PM	-6.1 ^°C	-10.6 ^°C	71 ^%	1025.4 hPa	16.1 ^km	Calm			Clear
9:52 PM	-7.2 ^°C	-11.1 ^°C	74 ^%	1025.4 hPa	16.1 ^km	Calm			Partly Cloudy
10:52 PM	-6.1 ^°C	-10.6 ^°C	71 ^%	1025.4 hPa	16.1 ^km	Calm			Scattered Clouds
11:52 PM	-7.2 ^°C	-11.1 ^°C	74 ^%	1025.4 hPa	16.1 ^km	Calm			Mostly Cloudy

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