CLARKSVILLE, OKLAHOMA

Average Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16		4		6		10		16		20		25		27		28		23		17		9		5

Average High Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		22		9		12		16		22		26		31		34		35		30		24		16		11

Average Low Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10		-1		---		4		10		15		19		21		21		17		10		3		---

Highest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		47		27		30		33		34		36		42		45		47		42		36		30		27

Lowest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-23		-23		-23		-18		-5		2		8		11		8		1		-8		-11		-20

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		---		---		---		---		2		13		23		22		12		2		---		---

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		14		9		1		---		---		---		---		---		---		9		16

Average Number of Days Below 0F/-17C

Years on Record: 14

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Average Precipitation

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1060		60		50		80		110		130		120		70		80		90		90		70		60

Average Number of Rainy Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		72		5		5		6		7		7		7		5		5		5		5		4		5

Average Snowfall

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		17		6		5		2		---		---		---		---		---		---		---		---		1

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
C		8		-2		---		1		7		14		18		20		18		14		9		1		-1

Heating Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2065.1		447.8		337.4		241.1		58.3		---		---		---		---		---		25.8		241.7		396.1

Cooling Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1063.7		---		---		---		---		77.5		216.7		301.4		301.4		166.7		---		---		---

Growing Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2788.3		---		---		17.2		191.7		335.8		466.7		559.7		559.7		416.7		232.5		8.3		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.5		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
Mj/m2		15.4		8.3		10.9		14.5		18.3		20.3		21.7		23.1		20.4		17.1		13.1		9		7.6

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		3.3		4.3		5.8		7.2		8.3		8.7		8		7.3		5.9		4.5		3.5		3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.7		12.5		13.9		16.6		18.4		18.6		19.1		20.6		19.8		18.8		16.9		13		11.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17		12.9		14		15.8		17.8		18.1		19.6		22.6		20.5		19.1		17.2		13.5		12.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.4		8.3		10.9		14.5		18.3		20.3		21.7		23.1		20.4		17.1		13.1		9		7.6

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.2		3.4		4.5		6		7.6		8.6		9.1		8.6		7.7		6.5		5		3.7		3.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.6		17.3		17.8		21.7		22.5		21.4		22		22.5		22.6		23		21.7		19.2		15.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23.7		20.1		19.9		24.1		25.5		24		26.2		27.2		26.3		26.6		24.6		22.9		17.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.4		7.1		7.9		11.9		14.2		15.9		17.5		20.4		18.5		13.1		10.2		6.3		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		2.7		3.8		4.8		6.2		7.7		7.8		7.3		6.4		4.8		3.6		2.6		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		13		10		9.3		13.1		14		14.7		15.6		18.3		17.8		13.8		12.3		8		8.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11		9.4		7.4		10.6		10.7		11.1		12.5		17.7		16.8		11.3		10.5		6.5		7.6