SAN SALVADOR ATENCO, MEXICO

Average Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.9		12.4		13.8		15.9		17.7		18.7		18.2		17.2		17.2		17		15.9		14.1		12.7

Average High Temperature

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		25		23.2		24.6		26.5		27.7		27.9		25.6		24.1		24.3		24		24.3		24.2		23.1

Average Low Temperature

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.9		1.6		3		5.3		7.7		9.4		10.9		10.3		10.2		10		7.4		4.1		2.3

Highest Recorded Temperature

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38		34		35		34		36		38		35		30		30.5		31		31		31		31

Lowest Recorded Temperature

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-13		-9		-9		-5		-2		---		3.5		-13		1.5		-1.5		-2.5		-7.5		-8

Average Precipitation

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		579		9		5		14		28		46		106		112		110		91		46		8		5

Average Number of Days With Hail

Years on Record: 54

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

Most Reported Precipitation in a Month

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		289		64		24		57		76		94		237		226		256		289		96		42		35

Most Precipitation Reported in a Day

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		75.5		51.5		19.4		39.1		30.7		42		51.3		58.8		60		75.5		73.2		24.2		19.2

Average Number of Rainy Days

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		107.8		1.9		1.8		3.8		7.3		10.4		16.2		19.8		18.7		15.3		8.3		2.6		1.7

Average Number of Days With Thunderstorms

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10.9		---		0.1		0.3		0.6		1.3		2		2.1		2.4		1.1		0.8		0.1		0.1

Heating Degree Days

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1034		183.4		127.9		75.8		18.3		---		2.5		35.3		33.6		40		77.5		125		174.8

Cooling Degree Days

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9.5		---		---		---		---		9.5		---		---		---		---		---		---		---

Growing Degree Days

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2226.1		74.9		107.5		182.6		231.7		267.8		247.5		223.1		224.8		210		180.8		125		83.6

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		11.5		11.9		12.4		13		13.5		13.7		13.6		13.1		12.6		12.1		11.6		11.4

Average Number of Days With Fog

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17.4		1.8		1		0.5		0.6		0.5		0.8		1.9		1.7		1.3		2.7		1.8		2.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.6		15		18		21.1		22.1		22.5		20.6		20.1		19.9		17.1		16.3		15.7		14.4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.7		4.8		5.4		6.2		7.4		8		8.5		8.5		8.1		7.5		6.3		4.9		4.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		18		20.3		22		21.4		20.8		20.6		19.9		18.9		17.2		17.6		18.5		16.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.7		18.9		21.2		22.7		21.4		20.8		17.4		16.6		17		14.3		16.2		19.3		18.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.6		15		18		21.1		22.1		22.5		20.6		20.1		19.9		17.1		16.3		15.7		14.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.2		5.4		6.2		7.2		8.1		8.8		8.9		8.8		8.5		7.7		6.7		5.4		5

Maximum 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		20.7		23.8		24.1		24.1		23.4		24		23.4		21		19.2		20.7		21.1		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		23.6		23.7		27.4		26.4		26.6		26.5		23.4		22.6		21		17.6		21.2		23.9		23.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.3		11.1		14.6		17.3		19.1		19.1		17.8		17		16.8		11.5		12.8		13.6		12.4

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6		4.1		4.3		5.5		6.4		7.1		7.7		7.8		7.6		7.3		5.7		4.2		3.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		12.5		16.1		17.8		18.5		17.8		17.6		16.7		15.9		11.4		13.5		15.7		14.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.7		10.4		14		15.3		15.9		14.8		12.8		11.7		11.9		6.3		9.9		14.7		14.1