SAN XAVIER INDIAN RESERVATION, ARIZONA

Average Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		20		11		12		15		18		23		28		30		29		27		21		15		11

Average High Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		27		17		19		21		26		31		36		36		35		33		28		22		17

Average Low Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		4		5		7		11		15		20		23		22		20		15		8		5

Highest Recorded Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		46		31		31		36		38		41		46		46		43		42		38		32		28

Lowest Recorded Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-8		-8		-5		-5		---		2		10		16		17		10		---		-3		-6

Average Number of Days Above 90F/32C

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		135		---		1		4		16		28		28		27		23		8		---		---		---

Average Number of Days Below 40F/4C

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48		14		10		6		1		---		---		---		---		---		1		4		12

Average Number of Days Below 32F/0C

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		4		2		1		---		---		---		---		---		---		---		1		3

Average Precipitation

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		290		20		20		20		---		---		---		50		50		30		20		10		20

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		1.5		0.9		0.9		0.9		1		1.2		1.7		2.9		3.1		2.3		1.4		1		0.9

Average Number of Rainy Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		51		5		4		4		2		1		2		10		9		4		3		3		4

Average Number of Days With Thunderstorms

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		46		1		1		1		1		2		3		14		14		5		2		1		1

Most Rain Reported in a Day

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		70		30		30		40		20		10		10		50		50		60		70		30		50

Most Rain Reported in a Month

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		590		120		80		70		40		40		20		160		120		110		130		50		140

Least Rain Reported in a Month

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		140		---		---		---		---		---		---		---		---		---		---		---		---

Average Snowfall

Years on Record: 47

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

Average Number of Days With Snow

Years on Record: 47

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

Deepest Snow Cover Reported

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		10		2		2		10		---		---		---		---		---		---		---		7		7

Most Snow Reported in a Day

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		63		7		5		1		---		---		---		---		---		---		16		15		16

Most Snow Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		18		13		8		10		1		---		---		---		---		---		---		16		15

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		36.6		48		45.3		37.8		27.1		20		18.9		39.3		46.3		38.9		34.1		37.4		47.2

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		49		60		60		54		38		34		28		47		60		50		45		51		60

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		26		35		33		27		17		16		14		26		33		26		24		27		36

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-1		---		---		-1		---		2		11		15		9		3		---		---

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11		5		7		7		10		12		15		18		20		16		12		7		5

Heating Degree Days

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		837.8		215.6		158.9		121.7		37.8		5		---		---		---		---		12.2		93.9		192.8

Cooling Degree Days

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1682.2		---		2.2		8.9		60.6		166.7		312.8		370.6		340		274.4		130.6		15		0.6

Growing Degree Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3875.5		34.4		78.5		155		266.7		413.3		566.7		620		602.8		516.7		361.7		166.7		51.7

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.8		11.5		12.4		13.4		14.3		14.7		14.5		13.7		12.7		11.8		10.9		10.5

Average Number of Days With Fog

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7		1		1		1		---		---		---		---		---		1		1		1		1

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		34		40		44		36		30		28		21		45		50		24		22		26		39

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		35.1		39.9		44.7		34.3		26.6		25.7		25.1		50		51.9		32.4		27		29.2		35.5

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		31.5		35.7		39.6		30.9		24.5		21.2		24.2		45.3		46.2		30.2		24.2		25.7		30

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.5		12.1		15.2		20.5		25.4		27.4		27.2		23.3		21.2		20.3		16.6		13.3		11.1

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.1		3.1		3.9		4.5		5.2		6.2		7.1		8.1		7.3		5.5		4.2		3.1		2.8

Average 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		17.8		20.3		23.8		25.4		24.9		23.6		20.7		20.4		21.9		21.1		19		17.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.7		20.8		22.4		27.3		31.2		31.5		29.6		22.4		21		24.1		23.3		22.6		20.1

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.5		12.1		15.2		20.5		25.4		27.4		27.2		23.3		21.2		20.3		16.6		13.3		11.1

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		3.8		4.6		5.5		6.3		8		8.2		8.6		7.8		6.1		5		3.5		3.3

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		20.3		23.9		26.2		28		28		25.9		23		23		24.7		24.5		21.5		19.3

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		24.9		28.3		31.9		36.8		39.7		35.7		27.7		26.5		29.3		29.2		26.7		23.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.3		9.8		13.4		18.1		23		22.8		24.3		21.3		19.5		18.8		14.3		12.3		9.9

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.1		2.5		3		3.7		3.9		4.3		5.8		7.2		6.4		4.6		3.2		2.5		2.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.6		13.4		17.2		20.6		23		20.8		21.3		19.1		18.7		20.1		17.5		17.2		14.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		13.9		17.4		21.5		25.9		21.9		23.7		18.8		17.8		20.7		17.5		19.6		16