DULLES, VIRGINIA

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Elevation: 88 meters Latitude: 38 57N Longitude: 077 27W

WEATHER

Monthly - Summary

CURRENT CONDITIONS

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MONTHLY - WEATHER AVERAGES SUMMARY [ Show All Data ]

[ °F ] °C

Average Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12		---		1		6		11		17		21		24		23		19		12		7		2

Average High Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18		5		6		12		18		23		28		30		30		26		20		13		7

Average Low Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6		-5		-5		---		5		10		15		18		17		12		5		1		-3

Average Precipitation

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1020		70		60		80		70		90		90		90		90		80		80		80		80

Highest Recorded Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40		23		26		31		33		36		37		40		40		37		32		28		25

Lowest Recorded Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-27		-27		-25		-18		-8		-2		2		5		3		-1		-9		-12		-20

Average Number of Days Above 90F/32C

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		---		---		---		---		1		6		12		8		3		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		115		26		23		17		6		---		---		---		---		---		5		15		24

Average Snowfall

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		57		18		17		8		---		---		---		---		---		---		---		2		9

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		117		10		9		10		10		12		10		11		10		9		8		9		10

Most Rain Reported in a Month

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1400		160		140		190		180		260		210		180		270		280		230		190		170

Average Morning Relative Humidity

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		82		77		77		78		77		82		84		86		89		89		88		82		78

Average Evening Relative Humidity

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		53		57		52		49		46		53		54		54		55		55		52		54		57

Average Dew Point

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6		-6		-5		-1		3		11		16		18		17		14		7		1		-3

Average Wind Speed

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		16		19		19		19		19		12		9		9		9		9		9		17		19

NEARBY - MAP

NEARBY - LIST

Herndon, Virginia (0 mi / 0 km)
Reston, Virginia (0 mi / 0 km)
Sterling, Virginia (2 mi / 3 km)
Manassas, Virginia (11 mi / 19 km)
Tyson's Corner, Virginia (11 mi / 19 km)

GEOBA.SE

Dulles, Virginia

WEATHER FORECAST