MAYUMBA, GABON

Average Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		25		26		26		27		27		26		23		22		23		23		25		25		26

Average High Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		26		28		28		28		28		27		25		24		24		25		26		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		24		22		21		21		22		23		23		24

Highest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		37		31		32		32		33		37		32		32		35		32		33		33		35

Lowest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15		19		21		22		22		16		17		17		17		15		17		21		21

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		66		9		12		14		15		6		1		---		1		---		1		3		5

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		246		15		12		12		8		18		27		30		30		28		25		21		20

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		2		---		---		---		---		---		---		1		---		---		---		---		---

Average Precipitation

Years on Record: 89

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1750		210		230		220		170		70		---		---		10		50		220		360		170

Average Number of Days With Thunderstorms

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		73		10		14		12		13		7		---		---		---		---		2		8		7

Most Rain Reported in a Month

Years on Record: 89

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		2900		600		750		530		820		360		20		---		200		540		750		760		430

Least Recorded Rainfall

Years on Record: 89

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		550		10		10		10		---		---		---		---		---		---		20		---		20

Average Morning Relative Humidity

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		95		95		95		95		95		96		94		94		93		94		94		96		96

Average Evening Relative Humidity

Years on Record: 6

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		81		80		80		79		81		82		80		78		79		82		83		83		84

Average Dew Point

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		22		23		24		24		24		23		21		20		20		21		22		23		23

Cooling Degree Days

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2710.7		249.7		235.4		266.9		266.7		241.1		166.7		137.8		137.8		166.7		206.7		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		5961.1		508.1		470.8		525.3		516.7		499.4		416.7		396.1		396.1		416.7		465		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		12.7		12.6		12.5		12.4		12.3		12.3		12.3		12.4		12.4		12.5		12.6		12.7

Average Number of Days With Fog

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		---		---		---		---		3		3		5		3		1		---		1		1

Average Wind Speed

Years on Record: 4

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

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.2		16.9		17.5		17.9		17		14.8		13.8		14.1		13.8		12.8		13.8		14.3		15.4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.7		8		8.3		8.4		7.8		7.2		6.8		7		7.5		7.8		8.1		8		7.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.1		16.8		17.4		17.6		16.9		14.8		13.9		14.1		13.7		12.7		13.6		14.2		15.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11		13.2		13.2		13.4		13.2		11.6		10.9		11		9.2		7		8.1		9.4		11.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.2		16.9		17.5		17.9		17		14.8		13.8		14.1		13.8		12.8		13.8		14.3		15.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.8		8		8.3		8.5		7.9		7.2		6.9		7		7.6		8.2		8.3		8.1		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		16.9		18.1		18.7		19		18		16.4		15.7		15.7		15.8		15.7		15.7		16.2		17.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		15.4		15.3		15.6		15.1		14		13.9		13.4		12.3		11		10.7		12.2		14.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.3		15.5		16.2		15.9		15.8		11.9		12.5		12.2		12.2		10.7		11.1		12.5		13.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.5		7.8		8.2		8.3		7.7		7.1		6.7		6.9		7.3		7.3		7.6		7.7		7.7

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		15.4		16.1		15.7		15.7		11.9		12.5		12.2		12.2		10.6		11		12.4		13.1

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.4		11.2		11.3		10.5		11.4		7.4		8.9		8.2		7.2		4.7		5.1		7		8.3