RIO CHICO, ZACATECAS

Average Temperature

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15		9.9		11.3		13.6		16.4		18.7		19.4		18.1		17.8		17		15		12.5		10.5

Average High Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23.6		19.1		21		23.5		26.2		28.2		27.2		24.8		24.5		23.7		23		22		19.7

Average Low Temperature

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.5		0.6		1.6		3.7		6.6		9.2		11.5		11.4		11.2		10.3		6.9		3.1		1.5

Highest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42		32		38		39		42		40		40		37		37		38		32		32		32

Lowest Recorded Temperature

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-15.5		-15.5		-13.2		-11		-6		-2		2		5.5		5.5		---		-5		-8.5		-14

Average Precipitation

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		470		18		19		4		5		13		64		107		106		73		36		11		14

Average Number of Days With Hail

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.3		---		0.1		0.1		0.2		0.1		0.1		0.3		0.3		---		0.1		---		---

Most Reported Precipitation in a Month

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		564		160		564		65		81		57		287		416		247		211		135		111		53

Most Precipitation Reported in a Day

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		121.3		33.4		41.9		40.5		34		32.2		121.3		77.2		75.5		67.5		79		34.2		27.1

Average Number of Rainy Days

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59.8		2.5		1.7		0.7		0.9		2.7		8.1		12.3		12.1		9.1		5.1		1.7		2.9

Average Number of Days With Thunderstorms

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.2		---		0.1		0.1		0.3		0.4		0.8		1.6		1.4		0.8		0.5		0.2		---

Heating Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1437		262.7		198.6		146.4		57.5		---		---		7.8		14.7		40		105.1		173.3		239.4

Cooling Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42.9		---		---		---		---		12.1		30.8		---		---		---		---		---		---

Growing Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1860.9		---		36.9		111.9		192.5		270.4		280.8		250.6		243.7		210		153.3		76.7		18.9

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		11.3		11.8		12.4		13.1		13.7		13.9		13.8		13.3		12.6		12		11.4		11.2

Average Number of Days With Fog

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.7		0.5		0.3		0.2		---		0.1		0.2		0.9		1.2		1.5		2		0.9		0.9

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.8		16.1		19.4		23.6		25		25.3		24.1		22.5		22.1		19.7		19.4		17.8		15.3

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		3.7		4.2		4.7		6.2		7.2		8		8.1		7.5		6.8		4.9		3.4		3.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.1		19.9		23.1		25.5		24.3		23.1		23.7		20.4		20.9		20.1		22.1		22.8		19.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.4		24.2		26.5		29.6		27.6		25.9		23.2		20.7		21.1		19.5		24.1		27		23.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.8		16.1		19.4		23.6		25		25.3		24.1		22.5		22.1		19.7		19.4		17.8		15.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.6		4.9		5.1		6.2		7.5		7.9		8.6		8.9		8.2		7.3		5.9		4		4.4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.8		24.1		27.4		27.6		28.5		24.8		26.1		22.5		22.1		22.2		25.2		25.3		22.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		29.8		32		34.4		33.8		36.8		29.9		27.6		25.2		23.7		23.4		29.9		31.8		29.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18		12.2		17.2		20.2		21.2		23.4		21.5		18.3		19.4		17.4		16.5		16.5		12.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.7		2.3		2.6		3.7		4		6.4		7.2		7.5		7.1		6.2		3.8		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		18.8		14.3		20.1		21.4		20.6		21.5		21.1		16.9		18.3		17.6		18.4		20.7		15.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.4		14.2		21		21.8		19.9		22.4		18.5		13.5		16.3		15.2		17.8		23.4		16.4