ARRINGTON, VIRGINIA

Average Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.4		2		3.3		7.9		13.3		17.7		22.2		24.4		23.8		20.1		14		8.9		3.8

Average High Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		20.1		8		9.8		14.9		20.8		24.6		28.7		30.6		30.1		26.6		21.3		16		9.8

Average Low Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.8		-4		-3.2		0.8		5.8		10.7		15.7		18.3		17.6		13.7		6.7		1.8		-2.3

Highest Recorded Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40.6		28.9		27.8		31.7		35.6		35		37.8		39.4		40.6		38.3		33.9		30		27.8

Lowest Recorded Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-23.3		-23.3		-20.6		-13.9		-7.8		-2.2		3.9		10.6		6.7		---		-5.6		-11.7		-19.4

Average Number of Days Above 100F/38C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.4		---		---		---		---		---		---		0.2		0.2		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		33.5		---		---		---		0.8		1.4		6.4		11.6		9.8		3.4		0.1		---		---

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116.4		---		0.1		1.2		5.8		12		22.4		27.8		26.5		15.3		4.4		0.8		0.1

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		187.1		0.6		1.3		5.9		14.6		23.5		28.8		30.7		30.6		26.7		16.8		6.5		1.1

Average Number of Days Above 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		250		4.5		6.5		14.7		23.6		29.4		30		31		31		29.8		27.6		16.6		5.2

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		302.6		11.7		14.5		23.9		28.8		31		30		31		31		30		30.7		25.3		14.7

Average Number of Days Above 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		344.3		22.6		23.4		29.6		29.9		31		30		31		31		30		31		29.5		25.3

Average Number of Days Below 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		357.8		31		28		31		30		30.9		28.9		27.3		29.1		29.7		31		30		31

Average Number of Days Below 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		279.9		31		28		31		29.5		26.7		12.6		4.4		6.4		20		29.3		29.9		31

Average Number of Days Below 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		216.9		30.7		27.8		29.8		24.5		14.1		1.9		---		0.4		6.7		22.7		27.9		30.5

Average Number of Days Below 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		154.7		29.1		25.5		24.3		12.5		2.8		0.1		---		---		0.8		11		20.6		28

Average Number of Days Below 32F/0C

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		104.8		24.1		21.8		15.4		4.2		0.3		---		---		---		---		4.2		13		21.8

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24.6		9.2		6.1		1.7		---		---		---		---		---		---		---		1.3		6.3

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.3		2.4		0.8		0.1		---		---		---		---		---		---		---		---		1

Average Number of Days Below 0F/-17C

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.6		0.4		0.1		---		---		---		---		---		---		---		---		---		0.1

Average Precipitation

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1092		83		75		95		82		105		96		111		95		92		86		84		88

Average Number of Days With Precipitation

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		87		7		7		8		8		8		7		9		7		6		6		7		7

Most Precipitation Reported in a Day

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		162.1		82.3		80		79.8		82.5		92.7		162.1		109.2		113.5		158.5		129.5		65.3		88.4

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		75.7		6		6.3		6.5		6.3		8.2		6.5		7.4		5.9		5.3		4.9		6.2		6.2

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

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		74		6		6		7		6		7		6		8		6		5		5		6		6

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

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		2		2		3		2		3		3		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		30.2		2.3		2.1		2.8		2.5		3.3		2.5		3		2.4		2.2		2.3		2.4		2.4

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

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		1		1		1		1		1		1		1		1		1		1		1		1

Most Rain Reported in a Month

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1714		222		169		214		224		272		286		327		304		390		319		204		229

Least Rain Reported in a Month

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		723		6		9		10		14		7		15		17		7		1		---		10		12

Average Snowfall

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		17.5		6.9		3.6		3		0.2		---		---		---		---		---		---		0.8		3

Most Snow Reported in a Month

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		100.3		80		29.2		43.2		7.6		1.3		---		---		---		---		7.6		10.2		43.2

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4284		896		727		587		299		119		16		1		2		51		262		508		818

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1136		---		---		3		21		76		229		344		304		135		22		2		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3851		12		15		68		212		424		663		809		767		534		247		82		18

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		7.5		10.2		13.8		17.1		18.5		20.4		19.8		17.6		15.4		12.5		8.3		6.6

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		5.7		7.2		8.5		8.9		8.6		7.7		6		4.3		3.3		2.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.4		11.7		13.5		15.9		17.2		17		18		17.7		17		16.9		16.5		12.3		10.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.9		11.8		13.5		15		16.1		15.5		17.5		17		15.7		16.3		16.9		12.7		10.9

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		7.5		10.2		13.8		17.1		18.5		20.4		19.8		17.6		15.4		12.5		8.3		6.6

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		8.8		7.8		6.3		4.8		3.5		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		18.2		14.4		16.2		18.1		20.2		21.2		20.4		19.6		18.7		19.8		21.1		16.8		12.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.7		15.3		17.7		18.4		21.3		23.9		22.9		20.7		18.7		21.2		23.8		19.1		13.6

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		6.2		7.6		11.1		14.9		12.6		17.8		17.7		15.2		12.9		9.4		5.6		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		5.4		2.9		3.8		5.4		6.7		7.6		8.3		8.3		7.5		5.5		3.5		2.8		2.7

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.9		8.8		9.2		12.2		14.8		11.6		15.7		15.9		14.6		13.7		11.5		7.2		7.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.7		8.1		7.6		9.7		12.1		6.9		13.1		13.5		11.6		11.4		9.7		5.8		7