NUKU'ALOFA, TONGA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		75.4		79.5		80.2		79.9		77.5		74.4		72.8		70.7		70.7		71.5		73.5		75.8		78.1

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		69.6		74.1		74.7		74.5		71.8		68.5		67.1		64.6		64.8		65.5		67.5		70		72.5

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		81.2		84.9		85.8		85.3		83.3		80.2		78.4		76.8		76.6		77.5		79.5		81.7		83.7

Highest Recorded Temperature

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		90		90		90		89		87		87		84		84		83		84		85		86		88

Lowest Recorded Temperature

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		51		62		63		60		60		56		52		51		52		52		55		56		61

Average Number of Days Above 90F/32C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.2		1.6		2.6		---		---		---		---		---		---		---		---		---		---

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		67.8		6.8		8.3		8.1		6.5		4.4		3.7		3.7		4.6		4.8		5		4.8		6.9

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		192		18		16		19		17		17		16		16		16		14		14		14		15

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		180		17		19		19		17		15		14		15		13		13		11		12		15

Average Relative Humidity

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		76		77		78		79		76		78		77		75		75		74		74		73		75

Average Dew Point

Years on Record: 6

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		65		69		71		71		68		66		63		61		61		61		63		65		66

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3784.6		450.1		430.5		461.3		376.2		291.1		233.1		176.7		176.7		195.3		263.2		324.9		405.5

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9263.3		915.1		854.3		926.3		826.2		756.1		683.1		641.7		641.7		645.3		728.2		774.9		870.5

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		13.6		13.1		12.6		12		11.5		11.3		11.4		11.8		12.4		13		13.5		13.8

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		10.5		11		11		10		9		9		9		10		11		11		11		12		12

Average Number of Days With Fog

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		---		---		1		---		---		1		1		1		1		---		1		---

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.4		6.7		6.3		5.7		4.7		4.1		3.7		3.9		4.5		5.3		6.3		6.6		6.6

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.8		2.4		2.2		1.9		1.6		1.3		1.2		1.2		1.5		1.8		2		2.3		2.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		6.1		6		5.8		5.2		4.9		4.5		4.6		5.1		5.6		6.1		6.1		6.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.6		6.2		5.9		5.6		5.1		5.2		5		5		5.2		5.4		6.2		6.2		6.1

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.4		6.7		6.3		5.7		4.7		4.1		3.7		3.9		4.5		5.3		6.3		6.6		6.6

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		2.6		2.4		2.1		1.8		1.4		1.3		1.3		1.7		2		2.3		2.5		2.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.4		7.3		7		6.6		6.7		5.4		5.2		5.3		5.9		6		6.8		6.7		8.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		7.2		9		7.9		7.2		7.7		6		6.4		6.2		6.5		6.2		7.5		7.5		8.8

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		5.3		5		5.1		3.2		3.8		3.2		3.5		3.2		4.6		5.2		5.8		6.1

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		1.9		1.9		1.7		1.2		1.2		1		1.1		1.3		1.7		1.8		2.1		1.9

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		4.9		4.8		5.2		3.4		4.4		3.7		4		3.5		4.8		5.1		5.4		6.1

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4		3.9		3.7		4.6		2.4		4.3		3.7		4		2.7		4.1		4.3		4.8		5.2