GLEN LYN, VIRGINIA

Average Temperature

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12.9		2.1		3.1		7.1		13.1		18.1		21.9		23.6		23		19.6		13.9		7.6		2.6

Average High Temperature

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		19.8		7.9		9.3		13.9		20.6		25.8		29.3		30.5		29.8		26.7		21.3		14.2		8.3

Average Low Temperature

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.1		-3.8		-3.2		0.3		5.6		10.4		14.6		16.7		16.2		12.6		6.4		0.9		-3.1

Highest Recorded Temperature

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40		25.6		25.6		31.1		32.2		35.6		40		38.9		37.2		36.7		34.4		30		24.4

Lowest Recorded Temperature

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-22.8		-22.8		-22.2		-17.8		-6.7		-2.2		1.7		6.1		5.6		-1.1		-11.1		-14.4		-21.1

Average Number of Days Above 90F/32C

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29.3		---		---		---		0.1		2		7		9.9		7.2		2.9		0.2		---		---

Average Number of Days Below 32F/0C

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		105.8		22.6		20.2		16.3		4.9		0.4		---		---		---		---		3.8		14.9		22.6

Average Number of Days Below 0F/-17C

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.3		0.8		0.3		---		---		---		---		---		---		---		---		---		0.2

Average Precipitation

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		929		70		70		83		74		89		86		104		90		71		62		62		67

Average Number of Days With Precipitation

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		109		9		9		10		10		11		10		11		9		7		7		8		9

Most Precipitation Reported in a Day

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		120.4		68.6		52.1		58.4		65		65.8		81.3		104.1		74.4		82.8		120.4		65.8		53.3

Avg. No. of Days w/Precip. Above 0.1in/2.5mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		73.5		5.4		6.1		6.4		6.8		8.2		6.7		7.2		6.5		5		4.6		4.9		5.7

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

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		78		6		6		7		7		8		7		8		7		5		5		5		6

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

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24		2		2		2		2		2		2		3		2		2		2		2		2

Avg. No. of Days w/Precip. Above 0.5in/13mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24.5		1.8		1.8		2.3		1.9		2.6		2.5		2.5		2.2		1.9		1.5		2		1.5

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

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7		---		---		1		---		1		1		1		1		1		1		---		---

Most Rain Reported in a Month

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1393		159		146		230		221		250		212		282		309		209		210		151		168

Least Rain Reported in a Month

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		561		9		1		20		10		10		20		27		14		1		---		1		3

Average Snowfall

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		25.4		6.1		7.6		4.3		0.5		---		---		---		---		---		0.2		1		5.6

Most Snow Reported in a Month

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		91.7		53.3		57.1		40.6		12.7		---		---		---		---		---		7.6		25.4		36.6

Heating Degree Days

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2790.4		505.5		431.6		347.9		156.7		7.8		---		---		---		---		137.8		324.2		488.3

Cooling Degree Days

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		455.9		---		---		---		---		---		108.3		162.8		145.6		39.2		---		---		---

Growing Degree Days

Years on Record: 92

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1937		---		---		---		93.3		250.6		358.3		421.1		403.9		289.2		120.6		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.4		11.3		12.4		13.7		14.7		15.2		14.9		14		12.8		11.6		10.6		10.1

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14		7.4		9.9		13.4		16.7		18.9		20.3		19.9		17.9		15.6		12.7		8.4		6.7

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		8.6		7.7		6.2		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		15.2		11.1		12.6		15.3		16.7		17.4		17.9		17.9		17.2		17		16.5		12.2		10.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.5		10.9		12		13.9		15.1		16		17.2		17.1		16		16.3		16.7		12.5		10.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14		7.4		9.9		13.4		16.7		18.9		20.3		19.9		17.9		15.6		12.7		8.4		6.7

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		4.9		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		18.4		13.1		15		17.8		19.3		21.5		20.5		20.4		19.5		20.3		21.1		19.4		12.3

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		13.6		15.6		17.7		19.5		24.3		22.8		22.4		20.1		22		23.9		23.1		13.1

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		5.9		7.5		10.2		13.4		14.6		17.5		17.8		15.9		12.5		9.2		5.5		5.9

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		4.1		5.5		7		7.6		8.4		8.1		7.3		5.5		3.6		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		11.8		8.1		8.8		11		13.2		13.4		15.5		16		15.3		13.2		11.1		6.9		8.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.4		7		6.9		8		9.6		9.3		12.6		13.5		12.5		10.5		9		5.3		8.1