BELFAST, NORTHERN IRELAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		49.7		41.1		41.4		44.3		47.4		52.1		56.9		60.3		59.7		56		50.5		45.1		41.5

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		56.1		46.2		46.9		50.4		54.3		59.7		64.2		67.5		66.7		62.8		56.5		50.5		46.8

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		43.3		36		35.8		38.3		40.5		44.4		49.6		53.1		52.7		49.3		44.6		39.6		36.1

Highest Recorded Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		86		59		59		60.8		68		73.4		86		84.2		84.2		75.2		71.6		64.4		59

Lowest Recorded Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		17.6		21.2		19.4		23		26.6		33.8		42.8		44.6		44.6		35.6		28.4		26.6		17.6

Average Number of Days Above 70F/21C

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9		---		---		---		---		1		1		3		3		1		---		---		---

Average Number of Days Above 60F/15C

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		85		---		---		---		2		8		15		21		25		11		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		10		2		2		1		---		---		---		---		---		---		1		2		2

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		34.3		3.1		2.4		3.1		2		2		2.8		2.8		3.1		3.1		3.5		3.1		3.1

Average Number of Days With Precipitation

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		218		20		18		19		18		16		17		17		17		17		19		21		19

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		37.2		3.6		2.6		3.1		2.5		2.5		2.6		2.6		3.4		3		3.9		3.8		3.6

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		155.5		14.7		11.4		13.8		11.4		11.8		11.2		12.1		13.4		12.3		14.4		14.5		14.4

Average Number of Days With Thunderstorms

Years on Record: 6

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

Average Number of Days With Snow

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		1		2		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		32.6		7.5		7		3.6		1.9		0.3		---		---		---		---		0.8		4.2		7.3

Average Relative Humidity

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		81		84		81		78		75		73		74		76		77		79		82		84		86

Average Evening Relative Humidity

Years on Record: 2

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		---		---		---		---		---		---		---		---		---		---		80		79		82

Heating Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5410.4		688.2		627.2		632.4		531		409.2		234		158.1		158.1		261		437.1		558		716.1

Growing Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1102.5		---		---		---		---		55.8		216		306.9		306.9		189		27.9		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13		8.7		10.4		12.5		14.8		16.9		18.1		17.5		15.5		13.3		11.1		9.1		8.1

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hr		1246.9		40.6		64.7		94.7		140.2		181.9		151.5		148.8		140.1		113.6		84.8		51.7		34.3

Average Number of Days With Fog

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13		1		1		1		1		1		1		1		1		1		1		1		2

Average Number of Days With Smoke/Haze

Years on Record: 6

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59		1		4		5		7		10		8		6		3		4		4		3		4

Average No. of Days With Vision Obstruction

Years on Record: 6

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		128		8		11		10		13		14		12		10		8		10		8		11		13

Average Wind Speed

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		10		11.2		11.2		11.2		10.6		10		10		8.7		8.7		8.7		10		10		9.3

Highest Reported Wind Gust

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		54.1		51.6		46		46		39.2		54.1		34.8		28.6		32.3		35.5		36.7		43.5		54.1

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.7		0.6		1.3		2.3		3.7		5		5.1		4.7		4		2.8		1.5		0.7		0.4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.4		0.8		1.4		2.1		2.6		2.7		2.7		2.2		1.5		0.9		0.5		0.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		1.1		2.1		2.9		3.9		4.5		4.4		4.1		4		3.3		2.2		1.3		0.8

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		0.9		1.8		2.4		3.4		4.4		4.2		3.7		3.5		2.9		1.9		1.2		0.6

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.7		0.6		1.3		2.3		3.7		5		5.1		4.7		4		2.8		1.5		0.7		0.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.4		0.9		1.5		2.1		2.6		2.8		2.7		2.3		1.7		1		0.6		0.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		1.3		2.7		3.9		4.4		5.3		5.4		5		5.1		4.1		2.7		1.7		0.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		1.1		2.5		3.6		4.2		5.8		6.2		5.4		5.5		4		2.5		1.6		0.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.2		0.4		1		2		3.3		4		4.2		4		3.3		2.2		1.2		0.6		0.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		0.3		0.7		1.3		2		2.5		2.7		2.6		2.1		1.4		0.8		0.4		0.3

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.3		0.7		1.4		2.4		3.3		3.6		3.6		3.5		3.1		2.5		1.6		1		0.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.6		1.1		1.8		2.5		2.7		2.8		2.5		2.2		1.9		1.3		0.8		0.4