SAO LUIS, MARANHAO

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		26.1		26.1		25.7		25.6		25.8		25.9		25.9		25.6		25.9		26.3		26.6		26.9		26.7

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		30.4		30		29.4		29.4		29.6		30.1		30.4		30.2		30.7		31		31.2		31.4		31.1

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23.3		23.5		23.1		23		23.1		23.1		22.9		22.6		23		23.5		23.7		24		24

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		36		33.6		36		32.8		33		33.2		33.1		32.7		34.4		34		33.2		34.4		33.8

Lowest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.1		20		20.1		17.9		13.1		20.2		20.6		18.1		20.3		20.9		21.2		21.6		20

Average Number of Days Above 95F/35C

Years on Record: 20

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

Average Number of Days Above 86F/30C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		303		23		18		19		21		25		27		28		29		28		29		28		28

Average Number of Days Below 75F/23C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		205		16		18		22		20		20		21		24		21		14		12		8		10

Average Precipitation

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		2196		260.2		344.4		404.2		361.2		330.3		206		143.7		25.8		14.9		12.9		19.3		98.5

Average Number of Days With Precipitation

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		111		12		16		19		20		15		10		7		3		1		2		1		5

Average Evaporation Rate

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1011.4		78.8		52.7		53.8		46.7		55		67.8		77.4		94.6		116.1		126.4		130.4		111.7

Average Number of Rainy Days

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		111		12		16		19		20		15		10		7		3		1		2		1		5

Average Number of Days With Thunderstorms

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27		3		4		4		4		4		2		3		1		1		---		---		1

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		84.9		85		88		89		90		89		86		86		84		81		81		79		81

Average Morning Relative Humidity

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		78.5		79.5		84.3		85.9		87.2		85.2		82.2		80.7		75.9		70		68.2		69.3		73.7

Average Evening Relative Humidity

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		69		69.8		73.5		75.5		77.1		73.9		68.8		67.9		65.2		62.5		62.7		63.7		67.4

Average Dew Point

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23		23		23		23		23		23		23		23		23		22		22		22		23

Cooling Degree Days

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3697.4		284.2		243.3		266.9		266.7		284.2		283.3		284.2		292.8		300		310		308.3		318.6

Growing Degree Days

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6947.7		542.5		478.7		525.3		516.7		542.5		533.3		542.5		551.1		550		568.3		558.3		576.9

Average Station Pressure

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		1005.1		1004.4		1004.4		1004.5		1004.6		1005.2		1006.2		1006.8		1006.3		1005.8		1004.8		1004.1		1004

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		12.6		12.5		12.5		12.4		12.4		12.4		12.4		12.4		12.4		12.5		12.6		12.6

Average Number of Days With Fog

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24		2		2		3		4		4		2		3		1		---		1		1		1

Average Number of Days With Smoke/Haze

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27		3		3		3		2		2		2		2		2		2		2		2		2

Average No. of Days With Vision Obstruction

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48		5		5		6		6		6		4		4		3		2		2		2		3

Average Percent of Cloud Cover

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		60		70		80		80		80		70		60		50		50		50		50		50		60

Average Wind Speed

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		14		16		14		12		12		12		12		12		14		16		17		17		17

Average No. of Days With Blowing Dust/Sand

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48		5		5		6		6		6		4		4		3		2		2		2		3

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.1		17.8		17.4		16.1		16.4		17.6		18.6		19.7		21.3		21.8		21.8		21.5		19.9

Average 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		7.8		8.2		8.4		7.8		6.8		6		5.9		6.4		7.2		7.5		7.2		7.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.1		17.7		17.2		15.9		16.3		17.6		18.9		19.9		21.3		21.6		21.6		21.4		19.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.7		14.8		13.2		10.9		12.4		16.3		19.8		21.4		22		20.6		20.4		21		19.1

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.1		17.8		17.4		16.1		16.4		17.6		18.6		19.7		21.3		21.8		21.8		21.5		19.9

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.6		8		8.3		8.5		7.9		7.2		6.6		6.5		6.8		7.8		8		7.7		7.8

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		21.3		23		19		19.4		20.2		21.2		22.3		23.2		24.6		24.6		23.9		21.7

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		21.1		23		15.5		17.5		21.1		24.7		26.4		25.8		26.6		26.2		26		22.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.6		14.2		14.1		13.4		13.3		14.1		16.7		17.8		19.9		19.4		19.6		19.6		16.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.5		7.2		7.1		8.2		7.5		6.2		5.2		5		5.7		6.1		6.4		6.3		6.8

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		14.1		13.9		13.2		13.2		14.1		16.8		17.9		19.9		19.3		19.4		19.5		16.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.4		9.3		8.4		7.3		8.1		10.4		15.9		17.4		19.3		16.4		16.4		17.5		13.6