JAMESTOWN, SAINT HELENA

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Elevation: 2057 feet Latitude: 16 00S Longitude: 005 42W

WEATHER

Monthly - Summary

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Forecast

Monthly - All Data

Climate Summary

CURRENT CONDITIONS

Sunrise/Set

02:31 am

02:12 pm
Local Time
4:09 pm EDT
19 April, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °C ] °F

TEMPERATURE

Average Temperature

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		60		64		66		66		64		62		60		59		57		57		57		59		60

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		69.1		72		73		73		73		72		68		66		64		64		66		68		70

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		59.2		61		63		63		63		61		57		57		57		57		55		57		59

PRECIPITATION

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		18.9		1.2		2.4		2		2		1.6		2		2		1.6		1.2		1.2		0.8		1.2

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		130		11		10		10		8		9		10		12		14		13		12		12		9

HUMIDITY

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		85.4		85		85		85		85		85		85		85		85		85		90		85		85

DEGREE DAYS

Heating Degree Days

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1561		31		---		---		30		93		150		186		248		240		248		180		155

Cooling Degree Days

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59.3		---		28.3		31		---		---		---		---		---		---		---		---		---

Growing Degree Days

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3977		434		452		496		420		372		300		279		217		210		217		270		310

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		13.3		13		12.5		12.1		11.7		11.6		11.7		12		12.4		12.8		13.2		13.5

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		8.5		6		5		5		8		10		11		11		11		11		10		8		6

Average Number of Days With Fog

Years on Record: 30

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

SOLAR RADIATION

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.7		7.2		7.3		6.7		5.8		5		4.5		4.5		4.7		5.1		5.5		5.9		6.5

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		2.1		1.9		1.7		1.5		1.3		1.2		1.3		1.6		2		2.3		2.4		2.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.9		7		6.9		6.7		6.3		5.7		5.3		5.1		5.1		5.2		5.3		5.8		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		6		7.3		7.6		7.2		6.8		6.4		5.9		5.5		5		4.7		4.6		5		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		5.7		7.2		7.3		6.7		5.8		5		4.5		4.5		4.7		5.1		5.5		5.9		6.5

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		2.3		2.3		2		1.7		1.4		1.4		1.5		1.7		2.1		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		6.5		7.7		7.3		7.3		6.8		6.1		5.9		6		5.6		5.8		5.9		6.5		7.5

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		8.6		8.6		8.4		7.9		7.2		7.1		7.1		5.9		5.7		5.7		6.4		7.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.1		6.4		6.1		5.9		5.1		4.7		3.8		3.9		4.2		4.4		5.1		5.2		5.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		1.8		1.7		1.5		1.3		1.1		1		1.1		1.5		1.8		2.1		2.2		2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		6.3		5.8		5.9		5.4		5.3		4.4		4.3		4.5		4.5		4.9		5.1		5.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.7		5.8		5.4		5.7		5.2		5.7		4.3		4.2		3.9		3.5		3.9		3.9		4.9

NEARBY - MAP

NEARBY - LIST

St. Helena, Saint Helena (5 mi / 8 km)

GEOBA.SE

Jamestown, Saint Helena