CHENNAI, INDIA

Average Temperature

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		28.5		24.6		25.8		27.8		30.3		32.5		32.4		30.7		30		29.6		28		26		24.8

Average High Temperature

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		32.9		28.8		30.5		32.6		34.7		37.4		37.3		35.3		34.5		33.9		31.8		29.4		28.4

Average Low Temperature

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		24.2		20.4		21.1		23		25.8		27.6		27.4		26.1		25.5		25.2		24.2		22.6		21.2

Highest Recorded Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42		32		38		38		40		42		42		40		37		40		38		36		33

Lowest Recorded Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16		17		16		17		20		20		21		20		21		21		20		18		16

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
mm		1260		30		10		10		10		40		50		90		120		120		280		330		130

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
mm		2240		240		280		260		190		590		210		290		390		370		950		850		710

Least Recorded Rainfall

Years on Record: 178

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		460		---		---		---		---		---		---		---		10		10		10		---		---

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
C		22		19		20		22		24		23		22		22		22		23		23		21		20

Cooling Degree Days

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3887.8		193.8		211.1		293.7		357.5		439.2		420		383.2		361.7		336.7		299.7		230		200.7

Growing Degree Days

Years on Record: 100

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6961.5		452.1		446.5		552		600		620		600		620		620		586.7		558		480		459

Average Vapor Pressure

Years on Record: 102

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		26.8		22.5		22.9		25.3		29.4		30.9		28.3		27.7		28.2		29.1		28.5		25.6		23.8

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
km/h		9		8		8		9		12		9		14		12		9		8		8		8		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		18.8		17.8		21.2		23.9		24.2		22		18.9		17		17.3		18		15.9		14.6		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		6.9		5.4		5.5		6		6.9		7.6		8.1		8.3		8.4		7.8		7.1		6.3		5.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		19.6		22.6		24.3		23.4		21.8		18.8		16.8		16.9		17.9		16.4		15.7		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		20.9		24.6		26.3		24.6		20.6		15.6		12.6		12.6		14.7		13.4		13.8		16.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.8		17.8		21.2		23.9		24.2		22		18.9		17		17.3		18		15.9		14.6		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		7.4		6		6.8		6.5		7.6		8.4		8.3		8.4		8.5		8		7.3		6.4		6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.7		21.5		24.9		25.9		24.9		24.1		21.2		19.9		20.4		20.7		21.1		17.7		18.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.4		24.5		28.9		29.3		27.7		24.8		19.6		17.5		18.4		19.4		21.1		17.1		20.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.3		15.3		16.9		22.5		22.2		18.5		16.6		14.2		15.3		16.6		12.9		12.3		12

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		4.8		4.6		5.3		6.3		7		7.7		8		8		7.3		6.3		6		5.3

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.5		16.6		17.7		22.9		21.5		18.2		16.4		14		14.9		16.4		13.2		13		12.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.5		15.7		15.7		23.4		20.7		14.4		11.9		8.6		9.7		12.4		8.8		9.7		10.4