CLARKSVILLE, OKLAHOMA

Average Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		61		39		43		51		61		69		78		82		82		75		63		50		42

Average High Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		73		49		54		62		73		80		89		94		95		87		76		62		52

Average Low Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		50		29		33		40		50		59		67		71		70		63		51		39		32

Highest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		118		81		87		93		94		98		109		114		118		108		98		86		81

Lowest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-11		-11		-11		-2		22		36		48		53		48		34		16		11		-4

Average Number of Days Above 90F/32C

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		76.3		---		---		0.1		0.2		2.5		13.8		23.1		22.4		12.1		2.1		---		---

Average Number of Days Below 32F/0C

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		74		22.3		14.3		9.3		1.1		---		---		---		---		---		0.7		9.4		16.9

Average Number of Days Below 0F/-17C

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.5		0.4		0.1		---		---		---		---		---		---		---		---		---		---

Average Precipitation

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		41.8		2.5		2.3		3.3		4.7		5.3		5		3		3.2		3.6		3.7		2.9		2.4

Average Number of Rainy Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		72.2		5.4		5.1		6.3		7.1		7.3		7.8		5.6		5.8		5.8		5.9		4.8		5.3

Average Snowfall

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		6.9		2.7		2.2		1		---		---		---		---		---		---		---		0.3		0.7

Average Relative Humidity

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		66		71		69		63		64		69		70		66		63		63		65		63		68

Average Dew Point

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		47		27		32		35		46		58		66		68		66		58		49		34		30

Heating Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3146.9		806		607.4		434		105		---		---		---		---		---		46.5		435		713

Cooling Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1914.5		---		---		---		---		139.5		390		542.5		542.5		300		---		---		---

Growing Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5019		---		---		31		345		604.5		840		1007.5		1007.5		750		418.5		15		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.5		11.4		12.4		13.6		14.6		15		14.8		13.9		12.8		11.7		10.7		10.3

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.3		2.3		3		4		5.1		5.6		6		6.4		5.7		4.8		3.6		2.5		2.1

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.9		1.2		1.6		2		2.3		2.4		2.2		2		1.7		1.3		1		0.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		3.5		3.9		4.6		5.1		5.2		5.3		5.7		5.5		5.2		4.7		3.6		3.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.7		3.6		3.9		4.4		4.9		5		5.4		6.3		5.7		5.3		4.8		3.7		3.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.3		2.3		3		4		5.1		5.6		6		6.4		5.7		4.8		3.6		2.5		2.1

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		1		1.3		1.7		2.1		2.4		2.5		2.4		2.1		1.8		1.4		1		0.9

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.7		4.8		4.9		6		6.3		6		6.1		6.3		6.3		6.4		6		5.3		4.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.6		5.6		5.5		6.7		7.1		6.7		7.3		7.6		7.3		7.4		6.8		6.4		4.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.5		2		2.2		3.3		4		4.4		4.9		5.7		5.1		3.7		2.8		1.8		1.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		0.7		1.1		1.3		1.7		2.1		2.2		2		1.8		1.3		1		0.7		0.7

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		2.8		2.6		3.6		3.9		4.1		4.3		5.1		5		3.8		3.4		2.2		2.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.1		2.6		2.1		2.9		3		3.1		3.5		4.9		4.7		3.1		2.9		1.8		2.1