CHENNAI, INDIA

Average Temperature

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		83.3		76.3		78.4		82		86.5		90.5		90.3		87.3		86		85.3		82.4		78.8		76.6

Average High Temperature

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		91.2		83.8		86.9		90.7		94.5		99.3		99.1		95.5		94.1		93		89.2		84.9		83.1

Average Low Temperature

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		75.6		68.7		70		73.4		78.4		81.7		81.3		79		77.9		77.4		75.6		72.7		70.2

Highest Recorded Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		109		91		102		102		104		109		108		104		100		104		101		97		93

Lowest Recorded Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		61		63		62		64		68		68		70		68		70		70		68		65		61

Average Number of Days Above 95F/35C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		95		---		1		3		13		24		23		14		10		6		1		---		---

Average Number of Days Above 86F/30C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		267		3		18		30		30		31		30		30		29		28		25		13		2

Average Number of Days Below 75F/23C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		144		31		24		16		2		1		1		3		3		4		7		23		29

Average Number of Days Below 65F/18C

Years on Record: 18

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

Average Precipitation

Years on Record: 178

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		49.8		1.2		0.4		0.4		0.7		1.7		2.1		3.9		4.9		4.9		11.2		13.2		5.4

Average Number of Days with Precipitation

Years on Record: 102

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48.3		1.4		1.1		0.5		1.1		2.3		3.4		5.8		6.5		6.2		7.8		8		4.3

Average Number of Days With Thunderstorms

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35		---		---		---		1		3		4		5		5		6		7		3		1

Most Rain Reported in a Month

Years on Record: 178

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		88.4		9.6		11.2		10.3		7.5		23.3		8.6		11.8		15.6		14.9		37.7		33.5		28.3

Least Recorded Rainfall

Years on Record: 178

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		18.4		---		---		---		---		---		---		0.3		0.7		0.5		0.4		0.2		---

Average Number of Days with Frost

Years on Record: 102

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.2		0.1		0.2		0.2		0.2		0.2		---		---		---		---		0.1		0.1		0.1

Average Morning Relative Humidity

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		85		90		90		90		88		77		68		77		79		86		90		91		90

Average Evening Relative Humidity

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		65		64		64		63		67		61		55		61		63		69		72		73		70

Average Dew Point

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		72		67		69		72		76		75		72		73		73		74		74		71		69

Cooling Degree Days

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6708.8		348.8		380		528.6		643.5		790.5		756		689.8		651		606		539.4		414		361.2

Growing Degree Days

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11869.7		813.8		803.7		993.6		1080		1116		1080		1116		1116		1056		1004.4		864		826.2

Average Vapor Pressure

Years on Record: 102

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
InHg		0.8		0.7		0.7		0.7		0.9		0.9		0.8		0.8		0.8		0.9		0.8		0.8		0.7

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		11.8		12.1		12.4		12.8		13.1		13.3		13.2		12.9		12.5		12.2		11.9		11.8

Average Number of Days With Fog

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10		4		2		1		1		---		---		---		---		---		---		1		1

Average Percent of Cloud Cover

Years on Record: 102

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		45.1		26.4		20		21.6		30.3		40.4		63.3		76.4		67.6		58.8		54		46.4		36.4

Average Wind Speed

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		6		5		5		6		8		6		9		8		6		5		5		5		5

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		4.9		5.9		6.6		6.7		6.1		5.2		4.7		4.8		5		4.4		4.1		4.2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.9		1.5		1.5		1.7		1.9		2.1		2.3		2.3		2.3		2.2		2		1.8		1.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.4		5.5		6.3		6.8		6.5		6.1		5.2		4.7		4.7		5		4.6		4.4		4.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5		5.8		6.8		7.3		6.8		5.7		4.3		3.5		3.5		4.1		3.7		3.8		4.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		4.9		5.9		6.6		6.7		6.1		5.2		4.7		4.8		5		4.4		4.1		4.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.1		1.7		1.9		1.8		2.1		2.3		2.3		2.3		2.4		2.2		2		1.8		1.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6		6		6.9		7.2		6.9		6.7		5.9		5.5		5.7		5.8		5.9		4.9		5.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.2		6.8		8		8.1		7.7		6.9		5.5		4.9		5.1		5.4		5.9		4.7		5.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		4.3		4.7		6.3		6.2		5.1		4.6		4		4.2		4.6		3.6		3.4		3.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.8		1.3		1.3		1.5		1.8		1.9		2.1		2.2		2.2		2		1.8		1.7		1.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		4.6		4.9		6.4		6		5.1		4.6		3.9		4.1		4.6		3.7		3.6		3.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		4.4		4.4		6.5		5.8		4		3.3		2.4		2.7		3.4		2.4		2.7		2.9