DAMASCUS, VIRGINIA

Average Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12.9		2.7		1.9		7.8		11.6		17.6		21.5		23.3		22.7		22.2		13.3		7.2		3.1

Average High Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		20.2		8.8		8.6		15.2		18.7		25.8		29		30.8		29.7		29.4		22.9		14.1		8.7

Average Low Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5.6		-3.5		-4.8		0.4		4.4		9.4		13.9		15.7		15.7		13.9		3.6		0.4		-2.5

Highest Recorded Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		36.7		21.7		23.9		31.7		29.4		32.8		36.7		36.1		36.7		36.7		30		26.7		21.1

Lowest Recorded Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-20.6		-20.6		-18.9		-13.3		-5		---		3.3		6.1		10.6		1.1		-5		-12.8		-20

Average Number of Days Above 90F/32C

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27.1		---		---		---		---		0.5		6.8		10		4.3		5.5		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110.6		20.5		23		15.8		5.8		0.2		---		---		---		---		8.3		17.6		19.4

Average Number of Days Below 0F/-17C

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.4		2.2		0.8		---		---		---		---		---		---		---		---		---		0.4

Average Precipitation

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1140		90		96		107		96		109		102		128		113		78		63		74		86

Average Number of Days With Precipitation

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		131		12		11		13		11		12		11		12		11		8		8		10		11

Most Precipitation Reported in a Day

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		93.2		61.7		47.8		62.2		67.1		60.5		84.3		76		77.5		64.3		93.2		53.6		45

Avg. No. of Days w/Precip. Above 0.2in/5mm

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		93		8		8		9		8		9		8		9		8		6		5		7		7

Avg. # of Days w/Precip. Above 0.4in/10mm

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		32		2		3		3		3		3		3		4		3		2		2		2		2

Avg. No. of Days w/Precip. Above 1in/25mm

Years on Record: 47

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

Most Rain Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1576		243		214		266		183		204		218		275		221		167		159		128		189

Least Rain Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		745		25		9		39		18		24		38		56		23		8		2		18		9

Average Snowfall

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		53.3		13.5		11.2		11.7		1		---		---		---		---		---		---		4.3		11.7

Most Snow Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		145.8		52.3		48.8		82.5		7.6		---		---		---		---		---		---		31.8		45

Heating Degree Days

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2844.2		485.7		465.3		325.5		203.3		23.3		---		---		---		---		157.6		332.5		472.8

Cooling Degree Days

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		481.8		---		---		---		---		---		94.2		153.3		134.3		100		---		---		---

Growing Degree Days

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1881.1		---		---		---		46.7		235.1		344.2		411.6		392.7		350		100.8		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.5		11.3		12.4		13.6		14.6		15.1		14.9		14		12.8		11.7		10.7		10.2

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.9		7.3		9.5		13.2		16.5		18.6		20.6		19.8		18.2		15.7		12.4		8.3		6.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.9		3.2		4.3		5.8		7.3		8.5		8.9		8.7		7.7		6.1		4.5		3.4		2.9

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15		10.8		11.9		15		16.6		17.1		18.1		17.8		17.6		17.1		16.1		12.1		10

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.3		10.5		11.1		13.5		14.8		15.5		17.6		16.9		16.6		16.5		16.1		12.2		9.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.9		7.3		9.5		13.2		16.5		18.6		20.6		19.8		18.2		15.7		12.4		8.3		6.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.1		3.3		4.4		5.9		7.5		8.6		9.1		8.9		7.9		6.4		4.8		3.6		3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.3		13.2		14.4		18.9		19		21.2		20.2		20.4		19.6		20.9		20.9		19		12.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.8		14		14.7		19.6		19		23.8		22.1		22.4		20.2		22.9		23.4		22.6		12.9

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.3		6		7.1		9.3		13.1		14.8		17.5		18		16.3		13.5		8.7		5.3		5.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.5		3.1		4.2		5.3		7.1		7.7		8.5		8.1		7.3		5.4		3.7		2.5		2.8

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.6		8.3		8.3		9.9		13		13.6		15.6		16.2		15.7		14.4		10.3		6.5		7.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.2		7.3		6.3		6.6		9.2		9.6		12.6		13.9		13.3		12.2		8		4.8		6.6