DULLES, VIRGINIA

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Elevation: 290 feet Latitude: 38 57N Longitude: 077 27W

WEATHER

Monthly - Summary

CURRENT CONDITIONS

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MONTHLY - WEATHER AVERAGES SUMMARY [ Show All Data ]

[ °C ] °F

Average Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		54		31		34		44		53		63		71		76		75		67		55		46		36

Average High Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		65		41		44		55		66		75		83		87		86		79		68		57		45

Average Low Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		43		22		23		32		41		50		59		65		63		55		42		34		26

Average Precipitation

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		40.3		2.8		2.7		3.4		3		3.9		3.6		3.6		3.8		3.5		3.2		3.4		3.3

Highest Recorded Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		104		75		79		89		92		97		100		104		104		99		90		84		78

Lowest Recorded Temperature

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-18		-18		-14		-1		17		28		36		41		38		30		15		9		-4

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
in.		22.6		7.2		6.8		3.3		0.3		---		---		---		---		---		---		1.1		3.9

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
in.		55.4		6.6		5.8		7.6		7.3		10.3		8.6		7.2		10.7		11.3		9.2		7.8		6.7

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
F		43		21		22		30		39		52		61		65		64		58		45		35		26

Average Wind Speed

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		10		12		12		12		12		8		6		6		6		6		6		11		12

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