ONLEY, VIRGINIA

Average Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.6		4.7		4.6		8.4		12.9		18.2		23.1		25.4		24.4		21.6		15.7		10.2		5.4

Average High Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		20		9.7		9.8		14.1		18.9		24.2		28.7		30.6		29.6		26.9		21.4		15.6		10.6

Average Low Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9.1		-0.5		-0.5		2.7		6.8		12.4		17.5		20.2		19.2		16.2		10.1		4.7		0.3

Highest Recorded Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		39.4		25.6		26.7		30.6		32.8		36.1		38.9		39.4		37.8		36.7		35		30.6		32.2

Lowest Recorded Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-19.4		-17.8		-19.4		-9.4		-6.7		-0.6		4.4		8.9		5		3.3		-4.4		-15		-15

Average Number of Days Above 90F/32C

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28.2		---		---		---		0.1		1		6.6		10.8		6.7		2.8		0.2		---		---

Average Number of Days Below 32F/0C

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		71		17.7		16.5		10.9		1.7		---		---		---		---		---		0.4		6.6		17.2

Average Precipitation

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1086		93		85		99		85		85		87		108		124		89		76		75		79

Average Number of Days With Precipitation

Years on Record: 37

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

Most Precipitation Reported in a Day

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		264.9		71.9		94		68.6		92.7		55.9		120.9		102.9		264.9		132.6		88.9		80		58.4

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

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		75		7		7		7		6		7		6		6		7		5		4		5		6

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

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		3		3		3		3		2		3		3		3		2		2		2		2

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

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10		1		1		1		1		1		1		1		1		1		1		1		1

Most Rain Reported in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1555		213		154		194		178		310		252		350		381		249		181		183		174

Least Rain Reported in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		727		25		39		30		19		12		7		15		12		---		15		5		29

Average Snowfall

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		33		8.4		12.2		3.8		---		0.2		---		---		---		---		---		0.5		7.6

Most Snow Reported in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		94		45		102.9		41.4		---		4.8		---		---		---		---		---		8.9		43.2

Heating Degree Days

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2330.7		425.4		386.1		308.3		163.3		1.7		---		---		---		---		80.1		245		400.4

Cooling Degree Days

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		644.7		---		---		---		---		---		143.3		218.7		186.9		95.8		---		---		---

Growing Degree Days

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2188		---		---		---		86.7		256.6		393.3		477.1		445.2		345.8		178.3		5		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.4		11.3		12.4		13.7		14.7		15.2		15		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		14.3		7.3		10.3		14		17.3		19.7		21.1		20.1		18.3		16		12.3		8.6		6.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		3.1		4.1		5.6		7.2		8.3		8.8		8.6		7.6		6		4.4		3.2		2.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.7		11.3		13.6		16.2		17.4		18		18.5		17.9		17.7		17.6		16.3		13.1		11.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		11.4		13.7		15.4		16.4		17.4		18.5		17.5		16.9		17.5		16.5		13.7		11.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.3		7.3		10.3		14		17.3		19.7		21.1		20.1		18.3		16		12.3		8.6		6.9

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		3.2		4.3		5.8		7.5		8.6		9.1		8.9		7.8		6.3		4.8		3.4		2.8

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		12.8		16.8		18.8		20.1		20.2		20.3		19.7		20.4		19.5		21.4		16		13.5

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		13.5		18.6		19.4		21.2		21.8		22.5		20.9		22.2		20.6		24.3		17.9		14.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.6		5.7		7.4		11.7		14.7		12.9		19		17.8		15.3		13.1		10.1		7		5

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		3		3.7		5.2		6.7		8		8.4		8.3		7		5.7		3.5		3		2.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.3		7.9		8.8		13.1		14.7		11.9		16.7		16		14.7		14		12.5		9.8		7.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.2		6.8		7.1		10.9		11.8		7.3		15		13.7		11.8		11.8		11.1		9.1		6.4