SAO TOME, SAO TOME AND PRINCIPE

Average Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		25		26		26		26		26		26		25		24		24		25		25		25		26

Average High Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		27		27		28		28		28		27		26		25		26		26		27		27		27

Average Low Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23		24		25		25		25		25		23		22		22		23		23		23		24

Highest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		33		32		33		32		32		32		31		32		32		33		33		33		33

Lowest Recorded Temperature

Years on Record: 10

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

Average Number of Days Above 86F/30C

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		79		10		13		16		13		9		2		1		1		2		3		4		4

Average Number of Days Below 75F/23C

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		245		19		16		18		16		17		20		24		25		24		24		22		19

Average Number of Days Below 65F/18C

Years on Record: 10

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

Average Number of Days With Precipitation

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59		4		4		6		7		5		1		1		2		6		8		9		6

Average Number of Rainy Days

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59		4		4		6		7		5		1		1		2		6		8		9		6

Average Number of Days With Thunderstorms

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		83		10		11		15		16		9		---		---		---		---		1		9		12

Average Morning Relative Humidity

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		92		95		94		94		94		92		90		88		88		92		92		94		95

Average Evening Relative Humidity

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		76		77		75		76		77		76		73		72		73		75		77		78		79

Average Dew Point

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		22		23		23		23		23		22		21		20		20		21		22		22		23

Cooling Degree Days

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2855.2		241.1		235.4		258.3		250		249.7		200		180.8		189.4		200		215.3		216.7		232.5

Growing Degree Days

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6105.8		499.4		470.8		516.7		500		508.1		450		439.2		447.8		450		473.6		466.7		490.8

Average Length of Day

Years on Record: 30

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

Average Number of Days With Fog

Years on Record: 8

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

Average Number of Days With Smoke/Haze

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		61		12		10		5		1		4		8		11		3		---		---		---		7

Average No. of Days With Vision Obstruction

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70		13		10		5		3		5		9		11		4		1		---		1		8

Average Wind Speed

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		12		8		9		9		12		14		14		14		14		12		12		9		8

Average No. of Days With Blowing Dust/Sand

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70		13		10		5		3		5		9		11		4		1		---		1		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		18.1		19		19.5		18.8		17.4		17.4		17.7		17.6		18.2		18.5		17.8		17.3		17.6

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.6		7.3		7.8		8.2		8		7.2		6.8		6.9		7.5		8.1		8		7.6		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		17.9		18.8		19.3		18.6		17.2		17.1		17.5		17.4		18		18.3		17.6		17.1		17.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		17.8		17		14.9		13.5		15.1		16.8		16.1		15.7		14.8		14		14.4		15.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.1		19		19.5		18.8		17.4		17.4		17.7		17.6		18.2		18.5		17.8		17.3		17.6

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.8		7.7		8		8.4		8.1		7.5		7.1		7.2		7.8		8.3		8.2		7.8		7.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.3		22.3		21.3		21.7		18.8		19.8		20.1		19.8		20.3		20.8		20.2		19.5		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		20		24.7		20.7		20.2		16.2		19.9		22		20.7		19.7		19		18.3		18.7		19.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		16.5		18.3		16.8		15.1		14.3		15.5		12.3		14.8		16.5		15.1		14.9		15.5

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7		6.2		7.3		7.6		7.8		6.7		6		6.4		7		7.6		7.6		7.2		6.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.3		16.3		18.1		16.6		14.9		14.1		15.3		12.2		14.6		16.3		14.9		14.7		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		11.3		13.4		14.9		11.8		10		10.2		12.8		7.9		10.2		11.7		9.9		10.7		12.3