WILLIAMS, ARIZONA

Average Temperature

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		---		1		3		8		11		16		19		18		16		10		4		---

Average High Temperature

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17		7		8		11		16		21		27		28		27		25		19		13		8

Average Low Temperature

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		---		-8		-6		-4		---		2		6		11		10		7		1		-4		-7

Highest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		37		21		23		24		30		37		37		37		35		33		29		25		21

Lowest Recorded Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-31		-31		-27		-21		-16		-13		-5		---		---		-11		-13		-21		-27

Average Number of Days Above 90F/32C

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		31.1		---		---		---		---		0.5		6.7		13		8.4		2.4		0.1		---		---

Average Number of Days Below 32F/0C

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		179		29.3		27.7		26.5		16.5		8.8		1.7		---		---		0.9		10.4		27.6		29.8

Average Number of Days Below 0F/-17C

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.4		1.7		2		---		---		---		---		---		---		---		---		0.1		1.5

Average Precipitation

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		550		50		50		40		30		10		10		70		80		40		30		30		50

Average Number of Days With Precipitation

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40		4		3		3		2		2		1		7		8		3		2		2		3

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		173		128		97		80		86		48		59		106		111		173		131		86		104

Most Precipitation Reported in a Day

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		43.2		36.8		36.6		23.1		6.9		19.3		22.1		27.9		43.2		35.6		15.2		15.2		19.3

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

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25		2		1		1		1		1		1		5		6		2		2		1		2

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

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4		1		---		---		---		---		---		1		1		1		---		---		---

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

Years on Record: 13

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

Average Number of Rainy Days

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		47		4		5		4		3		2		1		5		6		3		2		2		4

Average Snowfall

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		172		41		36		27		12		5		---		---		---		---		2		13		32

Most Snow Reported in a Month

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		48.3		48.3		12.7		7.6		5.1		2.3		---		---		---		---		1.3		7.6		27.9

Average Relative Humidity

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		60		70		61		64		57		47		39		58		67		61		57		65		70

Average Dew Point

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-2		-7		-6		-7		-4		-4		-3		8		7		2		-3		-6		-8

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1552.2		342.2		244.4		198.9		107.8		32.2		1.1		---		---		1.7		58.9		217.2		347.8

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1139.4		---		---		5.6		25.6		90		217.8		311.1		278.3		165.6		44.4		1.1		---

Growing Degree Days

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1037.8		---		---		---		---		68.9		200		310		275.6		183.3		---		---		---

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		10.7		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		18.4		10.5		13.7		19		23.5		26.4		27.4		22.9		20.4		19.6		15.8		12		9.8

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		2.9		3.8		4.6		5.7		6.5		7		8.1		7.3		5.3		3.8		2.9		2.6

Average 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		16.5		18.3		22.6		23.9		24		23.6		20.4		19.7		21.7		21		18.4		16.4

Average 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		18.8		20.7		25.6		28.3		29.9		30.4		22.2		20.1		24.2		23.5		21.6		19

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.4		10.5		13.7		19		23.5		26.4		27.4		22.9		20.4		19.6		15.8		12		9.8

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.9		3.5		4.6		5.4		6.5		8.5		8.4		8.8		7.8		5.9		4.5		3.4		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		24.1		19.9		23.1		26.6		27.2		27.1		26.1		22.9		23.3		24.3		26.5		21.6		20.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		30.5		24.3		29		32.8		35.1		37.9		37		28.1		27.6		29		32.8		26.9		24.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.8		8.5		10.7		17.1		21.3		20.2		23.4		19.8		18		17.9		14		10.7		8.1

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		3.9		2.3		2.6		3.3		4.3		4.8		5.6		7.1		6.2		4.5		2.3		2.2		1.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.2		12.3		13.2		19.8		21.6		18.5		20.4		17.8		17.3		19.5		18.1		15.7		12.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.6		12.6		12.8		20.7		23.4		17.7		22.3		16.6		15.6		20.1		18.8		17.4		13.2