ALDERNEY, CHANNEL ISLANDS

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		52		44.2		43.4		45.8		47.8		52.8		56.7		60.7		61.5		59.7		55.2		49.9		45.6

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		56.1		47.5		47.1		49.5		52.3		57.6		61.7		65.7		66		63.9		59		53.2		49.1

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		47.8		40.8		39.7		42.1		43.3		48		51.6		55.8		57		55.6		51.4		46.6		42.1

Highest Recorded Temperature

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		88		55		55		64		64		75		77		81		88		77		72		61		55

Lowest Recorded Temperature

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		19		30		19		32		36		32		43		52		50		52		45		41		32

Average Number of Days Above 65F/18C

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		46		---		---		---		---		4		7		11		16		7		1		---		---

Average Number of Days Below 32F/0C

Years on Record: 5

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

Average Number of Days With Precipitation

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		242		23		19		21		19		14		17		19		19		21		24		24		22

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		30		3.2		2.3		2.1		1.7		1.7		1.8		1.9		1.8		2.2		4.2		4.1		3.2

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		125.2		13.8		11.1		11.7		9.1		7.9		7.9		7		7.2		8.4		12.1		15.2		13.7

Average Number of Days With Thunderstorms

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		---		---		---		---		1		1		2		1		1		---		---		---

Average Number of Days With Snow

Years on Record: 4

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

Heating Degree Days

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4455.8		604.5		593.3		542.5		495		341		225		108.5		77.5		150		294.5		435		589

Growing Degree Days

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1578.5		---		---		---		---		124		225		356.5		387.5		300		170.5		15		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.9		9.3		10.7		12.5		14.4		16.1		17		16.5		15		13.1		11.3		9.7		8.8

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hr		1782.9		58.1		80.8		125.8		186.2		220.8		231.2		236.5		219.9		171.6		120.8		77.8		53.6

Average Number of Days With Fog

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		146		12		11		14		13		14		14		17		16		9		7		8		11

Average Number of Days With Smoke/Haze

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		107		7		8		8		12		17		12		10		8		8		6		4		7

Average No. of Days With Vision Obstruction

Years on Record: 4

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		198		15		15		18		18		24		21		22		18		14		9		10		14

Average Wind Speed

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		18		21		19		19		18		17		14		14		13		18		18		19		25

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		0.9		1.6		2.7		4.2		5.4		5.6		5.6		4.8		3.3		2		1.1		0.7

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.6		0.9		1.5		2.1		2.5		2.7		2.6		2.2		1.7		1.1		0.7		0.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.4		1.5		2.4		3.3		4.4		4.9		4.9		4.9		4.8		3.8		2.7		1.8		1.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		1.3		2.1		2.7		4		4.9		5		5		4.6		3.4		2.4		1.5		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		3.2		0.9		1.6		2.7		4.2		5.4		5.6		5.6		4.8		3.3		2		1.1		0.7

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.7		1		1.7		2.1		2.5		2.7		2.6		2.3		1.8		1.2		0.8		0.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4		1.9		2.9		4.1		5.2		5.7		5.9		5.7		5.9		4.5		3.1		2.1		1.5

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.2		1.8		2.6		3.7		5.2		6.4		6.9		6.5		6.4		4.3		2.8		1.8		1.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		0.7		1.4		2.3		3.6		4.2		4.5		4.7		3.8		2.9		1.6		0.9		0.6

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		0.5		0.9		1.5		2.1		2.5		2.7		2.6		2.2		1.6		1		0.6		0.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.7		1.1		2		2.7		3.6		3.8		3.9		4.1		3.7		3.2		2.2		1.3		0.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.2		0.9		1.7		2		2.8		2.9		3		3.5		2.8		2.7		1.8		1.1		0.8