CHARLESTON, TENNESSEE

Average Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.6		3.3		5.3		9.6		14.6		19		23.1		25.1		24.7		21.2		14.9		9.2		4.7

Average High Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		21.2		9.1		11.7		16.5		22.1		26		29.6		31.3		31		27.8		22.2		16.1		10.6

Average Low Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		-2.5		-0.9		2.7		7.2		12		16.6		18.8		18.4		14.7		7.7		2.4		-1.1

Highest Recorded Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40.6		23.3		25.6		30		32.8		35		36.7		40.6		40		37.2		31.7		29.4		24.4

Lowest Recorded Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-26.7		-26.7		-18.9		-17.8		-6.7		-1.1		2.8		9.4		8.3		-1.1		-6.1		-12.8		-20

Average Number of Days Above 90F/32C

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35.2		---		---		---		0.1		0.9		6.3		12.9		11.4		3.8		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		86.4		20.9		17.1		11		3.2		0.1		---		---		---		---		2.9		12		19.3

Average Number of Days Below 0F/-17C

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.4		0.3		---		---		---		---		---		---		---		---		---		---		0.1

Average Precipitation

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1371		126		118		143		112		118		111		123		86		108		83		118		127

Average Number of Days With Precipitation

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		128		12		11		12		10		11		11		12		10		9		8		11		12

Most Precipitation Reported in a Day

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		171.7		98		88.9		171.7		109.2		115.3		120.9		129.5		77		148.6		83.3		88.9		100.3

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

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		86		8		8		9		7		7		7		8		6		6		5		7		8

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

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		38		4		4		4		3		3		3		3		3		3		2		3		3

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

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15		1		1		2		1		1		1		1		1		1		1		1		1

Most Rain Reported in a Month

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1852		231		239		371		315		344		251		342		178		336		213		245		355

Least Rain Reported in a Month

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		832		35		16		32		30		26		28		19		16		14		---		40		26

Average Snowfall

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		5.6		2.3		1.5		0.2		0.2		---		---		---		---		---		---		---		1.3

Most Snow Reported in a Month

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		39.4		19.1		22.4		6.3		7.6		---		---		---		---		---		---		2.5		21.6

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2157.8		491.1		377.8		270.6		127.8		45		---		---		---		12.2		134.4		271.7		427.2

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		686.7		---		---		---		6.1		51.7		135		200		187.8		90.6		15.6		---		---

Growing Degree Days

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2223.7		---		---		---		138.3		279		393.3		466.7		456.4		336.7		153.3		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.6		11.4		12.4		13.6		14.5		15		14.7		13.9		12.8		11.7		10.8		10.3

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		8.1		10.3		14.3		17.9		19.5		20.6		20.4		18.5		16.6		13.6		9.4		7.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6		3.5		4.5		5.9		7.3		8.5		8.9		8.6		7.7		6.2		4.6		3.6		3.1

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.8		11.5		12.8		16.1		17.9		17.9		18.2		18.3		17.8		17.9		17.4		13.2		11.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.3		11.4		12.1		14.8		16.8		16.6		17.5		17.8		16.6		17.5		17.8		13.6		11.2

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		8.1		10.3		14.3		17.9		19.5		20.6		20.4		18.5		16.6		13.6		9.4		7.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.3		3.5		4.6		6.1		7.6		8.7		9.1		8.9		8		6.5		5.1		3.8		3.2

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		15.1		16.7		19.8		20.5		20.7		20.4		21.9		21.2		21.5		21.7		18.4		13.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.3		16.7		17.6		20.8		21.4		22.3		22.4		25.6		23.2		23.7		24.7		21.7		15.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		6.7		8.1		10.8		14.2		16.9		16.7		18.2		16		14.4		10.1		7.2		6.2

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		3.1		4.2		5.4		6.9		7.9		8.4		7.6		7		5.4		3.7		2.9		2.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.6		8.9		9.3		11.6		14		15.6		14.9		16.4		15.4		15.2		11.9		9.4		8.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.3		7.8		7.3		8.5		10.5		12.3		11.4		14		12.4		13.2		9.9		8.1		7.7