BALLYKELLY, NORTHERN IRELAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9.7		5.1		5.2		6.8		8.5		11		13.4		15.3		15		13.3		10.4		7.4		5.3

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		8		8.2		10.1		12.1		15		17		18.9		18.5		16.7		13.5		10.2		8

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.4		2.2		2.1		3.5		4.8		7		9.7		11.6		11.4		9.8		7.2		4.5		2.5

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		29		13		13		19		20		25		28		29		27		24		20		16		14

Lowest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-12		-12		-11		-12		-4		-3		-1		2		1		-2		-4		-6		-10

Average Number of Days Below 32F/0C

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42		8		7		7		4		---		---		---		---		---		1		4		6

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		850		80		50		40		40		50		60		90		80		80		80		70		90

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		852.6		83.5		62.7		69.8		55.2		51.2		56.1		66.1		75.3		68.7		89		86.7		88.4

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		170.5		16.9		13.3		15.6		12.2		12.3		10.7		13.1		13.2		13.3		16.2		18.7		15.1

Average Number of Days With Frost

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		26.5		6.5		6.2		3.2		1.3		0.2		---		---		---		---		0.4		2.4		6.5

Average Relative Humidity

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		83		90		85		81		76		73		76		79		82		83		86		89		90

Average Dew Point

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7		3		3		5		6		7		9		12		12		13		8		6		4

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3711.4		447.8		400.2		378.9		316.7		241.1		158.3		111.9		120.6		166.7		266.9		358.3		413.3

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		476.4		---		---		---		---		17.2		91.7		146.4		137.8		83.3		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13		8.6		10.4		12.5		14.9		17		18.2		17.6		15.6		13.3		11		9.1		8

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hr		1343.8		52.3		72.4		100.9		155		202.7		161.4		140.4		141.1		119.6		102.5		57.9		37.7

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		16.7		20.4		20.4		20		16.9		14.3		14.3		14.3		13.7		15		16.5		17.6		17.2

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10		2		4.5		8.5		14.3		19.1		19.3		17.6		14.9		10.5		5.6		2.6		1.4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		1.4		2.8		5		7.4		9.2		9.9		9.7		8.1		5.6		3.4		1.8		1.1

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.8		4		7.3		10.7		15.3		17.6		16.6		15.5		14.8		12.6		8.3		4.6		2.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.1		3.4		6.3		9		14.4		18.4		16.9		14.4		13.4		11.5		7.3		4.1		2.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10		2		4.5		8.5		14.3		19.1		19.3		17.6		14.9		10.5		5.6		2.6		1.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		1.6		3.2		5.5		7.5		9.3		10		9.8		8.1		5.9		3.7		1.9		1.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.8		4.8		8.9		14.1		17.8		20.4		19.1		18.1		17.6		14.8		9.8		5.3		3.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		4.2		8.1		13.1		18.4		23.6		22		19.7		18.2		14.3		8.9		4.7		3.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.6		1.8		3.6		7.1		12.2		16		16.8		15.7		13		8.7		4.7		1.9		1.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		1.3		2.5		4.7		7.3		9.2		9.8		9.6		8		5.3		3		1.5		1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.9		3.1		5.4		8.4		12.5		14.5		14.5		13.8		12.6		9.9		6.6		2.9		2.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.2		2.5		4.4		6.3		9.9		12.5		12.6		11.1		9.9		8.1		5.5		2.2		1.9