JERSEY, CHANNEL ISLANDS

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11.5		6.3		6.1		7.9		9.5		12.6		15.1		17.2		17.5		15.8		13		9.6		7.1

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.2		8.3		8.4		10.4		12.5		15.8		18.4		20.4		20.6		18.7		15.4		11.7		9.2

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.8		4.3		3.8		5.3		6.5		9.3		11.8		13.9		14.3		12.9		10.6		7.5		5

Highest Recorded Temperature

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		34		13		17		18		25		27		31		32		34		27		22		21		16

Lowest Recorded Temperature

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-8		-8		-8		-3		-1		1		6		10		8		7		2		-1		-3

Average Number of Days Above 65F/18C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64		---		---		---		1		5		9		17		20		10		2		---		---

Average Number of Days Below 32F/0C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		3		5		1		---		---		---		---		---		---		---		1		2

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		120		10		10		10		10		10		10		10		10		10		10		10		10

Average Number of Days With Precipitation

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		247		24		20		23		18		19		18		18		18		19		22		24		24

Average Number of Days With Sleet

Years on Record: 19

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

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		865.8		93.1		68.9		66.1		56.4		55.6		47.5		44.6		49.5		63.9		103.4		105.4		111.3

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		132.2		14.8		11.7		11.7		10.1		8.9		7.5		7.1		7.3		9.2		13.6		15.2		15.2

Average Number of Days With Thunderstorms

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		1		---		---		---		1		1		2		1		2		1		1		1

Average Number of Days With Snow

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		2		3		1		1		---		---		---		---		---		---		---		1

Average Number of Days With Frost

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.1		3.6		4		0.7		---		---		---		---		---		---		---		0.5		2.3

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		84.6		90		85		85		85		80		85		85		85		80		85		85		85

Average Morning Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		89		88		89		90		88		89		90		90		91		89		88		87		89

Average Evening Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		77		84		81		79		73		72		72		73		71		74		78		81		84

Average Dew Point

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7		3		3		5		5		8		11		13		13		12		9		6		5

Heating Degree Days

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2962.4		378.9		353.1		344.4		291.7		206.7		116.7		60.3		43.1		91.7		180.8		275		344.4

Growing Degree Days

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		834.2		---		---		---		---		51.7		133.3		198.1		215.3		158.3		77.5		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.4		10.7		12.5		14.3		16		16.9		16.4		14.9		13.1		11.3		9.7		8.9

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hr		1904.8		66.1		91.6		134		196.5		236.7		245.4		252.7		235.3		184.6		118.8		79.9		63.2

Average Number of Days With Fog

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		138		11		12		13		10		12		14		15		14		10		8		8		11

Average Number of Days With Smoke/Haze

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		129		9		14		11		12		13		11		12		12		10		9		7		9

Average No. of Days With Vision Obstruction

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		197		16		19		18		17		19		19		19		19		14		11		11		15

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		21.1		25		22.8		21.7		20.6		19.4		18.1		18.5		17.8		19.8		22.8		23.7		24.1

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.8		3.3		5.9		10		15.7		20.1		21.6		20.9		18.2		12.6		7.1		3.9		2.6

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.2		3.4		5.6		7.6		9		9.6		9.2		8		6.2		3.8		2.5		1.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.5		5.2		8.4		11.9		16.4		18.5		18.6		18.5		18.1		14.5		9.5		6.2		4.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12		4.5		7.3		9.9		15.1		19		19.9		19.6		18.1		13.2		8.5		5.2		3.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.8		3.3		5.9		10		15.7		20.1		21.6		20.9		18.2		12.6		7.1		3.9		2.6

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6		2.6		3.8		5.9		7.7		9.1		9.8		9.4		8.1		6.5		4.4		2.9		2

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15		6.9		10.2		14.3		21		22		21.9		21.4		20.7		17		11.6		8.2		5.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		6.4		9.2		12.6		22.3		25.1		26		24.7		22.3		16.4		10.7		7.2		4.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.7		2.8		5.1		8.9		13.3		16.6		16		17.8		15.3		10.9		5.2		2.9		1.9

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.5		2		3.1		5.4		7.5		8.9		9.5		9.1		7.9		5.9		3.2		2.1		1.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10		4.2		7		10.3		13.5		15.1		14		15.8		14.9		12.3		6.5		4.1		2.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.2		3.5		5.8		7.8		10.5		12.7		10.7		14.1		12.7		10.4		5.2		3.1		2