WILLIS, OKLAHOMA

Average Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17.2		4.4		7.9		11		17.1		22.4		25.9		29		28.6		24.5		18.4		11.9		5.4

Average High Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23.7		11.1		14.3		17.7		23.4		28.1		31.9		35.3		35.5		31.5		25.1		18.7		12.2

Average Low Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.8		-2.3		1.2		4.4		10.7		16.7		19.9		22.7		21.7		17.5		11.6		5.1		-0.1

Highest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42.8		27.8		29.4		33.9		32.8		35		39.4		42.8		42.8		38.3		37.8		29.4		24.4

Lowest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-15.6		-15.6		-12.8		-9.4		-5		5		10		16.7		13.3		5.6		-6.7		-8.9		-14.4

Average Number of Days Above 90F/32C

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		91.2		---		---		0.1		0.2		3		16.7		27.3		27.9		14.8		1.2		---		---

Average Number of Days Below 32F/0C

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62.8		20.2		13		6.1		0.5		---		---		---		---		---		0.4		7.2		15.3

Average Precipitation

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		953		33		44		79		103		111		102		70		54		148		70		88		50

Average Number of Days With Precipitation

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		56		3		4		5		7		6		6		4		4		5		4		4		4

Most Reported Precipitation in a Month

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		305		78		74		133		281		235		305		191		110		265		281		216		100

Least Reported Precipitation in a Month

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		5		5		7		20		31		18		6		3		---		---		12		12

Most Precipitation Reported in a Day

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		124.5		25.4		47		50.8		78.7		124.5		96.5		120.4		61.2		102.9		104.4		102.9		53.6

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

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48		3		4		4		6		6		5		3		3		4		3		4		3

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

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24		1		1		3		3		3		2		1		2		3		2		2		1

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

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13		---		---		1		1		2		2		1		1		2		1		1		1

Average Snowfall

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		10.9		4.1		3		1.5		---		---		---		---		---		---		---		---		2.3

Most Snow Reported in a Month

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		19.1		19.1		17.8		7.6		---		---		---		---		---		---		---		---		16.5

Heating Degree Days

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		836.7		263.9		150.6		92.2		11.1		---		---		---		---		---		6.7		80.6		231.7

Cooling Degree Days

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1293.3		---		0.6		3.9		30.6		135		227.2		330		318.3		187.2		53.9		6.7		---

Growing Degree Days

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3022.8		---		---		31		213.3		384.1		476.7		589		576.9		435		260.1		56.7		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.7		11.4		12.4		13.5		14.4		14.9		14.6		13.8		12.8		11.7		10.8		10.4

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.2		9.4		12		15.5		19.1		20.5		22.6		24.1		21		17.9		13.9		10		8.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		3.4		4.4		5.8		7.2		8.4		8.5		7.8		7.3		6		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		17.5		13.6		15.5		17.5		19.1		18.8		19.8		21.4		20.3		19.3		17.5		14.1		12.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18		14.3		15.5		17		18.8		18.2		20.9		24.2		21.1		19.8		17.8		14.9		13.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.2		9.4		12		15.5		19.1		20.5		22.6		24.1		21		17.9		13.9		10		8.5

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		3.7		4.8		6.2		7.7		8.7		9.1		8.5		7.8		6.7		5.2		3.9		3.4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.4		18		21.1		22.2		23.5		21.4		22.4		23.2		23.3		22.6		22.8		20.1		16

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.8		21.1		23.8		24.7		27.1		23.4		26.9		28.6		27.4		25.7		26.2		24.3		18.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		7.2		9.2		11.8		15.4		17.8		17.5		21.7		18.6		14.3		10		7.7		6.6

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		2.8		3.5		4.9		5.9		7.7		7.7		7.1		6.2		5.1		3.6		2.6		2.8

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		9.6		11.1		12.8		15.3		16.3		15.7		19.4		17.9		15.1		11.6		9.8		9.1

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.7		8.6		9.1		9.9		12.2		13.5		12.4		19.7		16.5		12.7		9.2		8.6		8.3