BIRR, IRELAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		49		41		41		44		47		52		57		59		59		55		50		44		42

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		56		46		47		51		55		61		66		67		67		63		57		50		47

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		43		36		36		37		39		43		49		52		52		48		43		38		37

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		87		57		59		71		74		78		84		87		83		78		74		64		59

Lowest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		6		6		15		13		24		26		33		39		36		29		18		20		14

Average Number of Days Below 32F/0C

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		49.7		8.9		9		8.9		5.6		0.9		---		---		---		0.7		2.2		6.7		6.8

Average Precipitation

Years on Record: 35

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		34.9		3.4		2.6		2.1		2		2.5		2.3		3.4		3.5		3.2		3.4		3.2		3.4

Average Number of Days With Hail

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7.3		0.6		0.8		1.8		2		0.9		0.1		---		0.2		0.1		0.2		0.3		0.3

Average Number of Rainy Days

Years on Record: 35

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		90		9		7.8		6.1		5.9		6.6		6.2		8		8.1		7.7		8		7.6		9

Average Number of Days With Thunderstorms

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.9		0.1		0.1		0.2		0.3		0.4		0.8		0.9		0.5		0.3		0.1		0.2		0.1

Most Rain Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		2.3		1.5		1.1		0.9		1		0.8		1.6		1.8		2.3		1.4		1.3		1.2		1.5

Avg. No. of Days w/Rain Above 0.1in/2mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		147		14		11		14		11		12		11		11		12		11		14		13		13

Avg. No. of Days w/Rain Above 0.2in/5mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53		5		4		4		3		4		4		3		5		4		6		5		6

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.7		3.5		2.6		2.5		0.8		0.2		---		---		---		---		---		0.2		1.9

Average Number of Days With Frost

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		98		16		15		13		12		7		1		---		---		2		6		11		15

Average Relative Humidity

Years on Record: 28

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		86		91		89		81		81		79		80		84		85		88		90		92		92

Average Morning Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		85.4		89.8		88.9		86.9		81.5		77.7		78.3		80.9		84.2		86.6		89.1		90.9		90.3

Average Evening Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72.8		82.4		75.6		71.6		65.1		64.7		66.2		67.5		68.5		70.3		76.1		81.1		84.5

Average Dew Point

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		45		39		39		38		41		45		51		54		55		52		47		42		40

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5660.9		744		663.9		651		540		403		225		170.5		170.5		285		465		630		713

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1041		---		---		---		---		62		225		294.5		294.5		165		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.9		8.9		10.5		12.5		14.7		16.6		17.7		17.1		15.3		13.2		11.1		9.3		8.3

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		15.7		7.7		9.4		10.5		13		15.1		15.7		15.2		13.6		11.5		9.7		8.5		6.9

Average Number of Days With Fog

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		20.4		2.1		1.3		1.1		1.5		1.1		0.8		1.1		1.8		2.5		2.1		1.9		2.9

Average Number of Cloudy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		67.4		11		7.1		5.8		2.9		2.2		2.9		2.5		2.5		3.5		6.2		8.8		12

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		4.2		4.9		5		4.8		4		3.9		3.6		3.5		3.5		3.7		4.2		4.3		4.7

Highest Reported Hourly Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		19.9		24.9		23.6		20.5		18		18		16.8		14.9		16.8		18.6		23		19.9		23.6

Highest Reported Wind Gust

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		36.8		46.6		47.8		39.8		36		34.2		30.4		30.4		28.6		31.7		39.8		33.6		42.9

Avg. # of Days w/Wind Above 32 mph/52 km/h

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.5		0.2		0.2		---		---		---		---		---		---		---		---		---		0.1

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.4		0.6		1.2		2.1		3.4		4.3		4.4		4.2		3.6		2.6		1.5		0.8		0.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.5		0.8		1.4		2.1		2.5		2.7		2.6		2.2		1.5		0.9		0.6		0.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		1.1		1.8		2.5		3.4		3.9		3.8		3.7		3.4		2.9		2		1.4		0.9

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		0.9		1.5		1.9		2.6		3.2		2.9		2.8		2.6		2.4		1.7		1.2		0.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.4		0.6		1.2		2.1		3.4		4.3		4.4		4.2		3.6		2.6		1.5		0.8		0.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.5		0.9		1.5		2.1		2.6		2.8		2.7		2.3		1.6		1		0.6		0.4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		1.6		2.2		3.5		4.2		4.5		4.8		4.7		4.9		3.6		2.5		1.7		1.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.1		1.4		1.9		3		3.7		4.2		4.8		4.7		4.9		3.2		2.3		1.5		1.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.1		0.5		0.9		1.6		2.9		3.7		3.9		3.6		3.1		2.1		1.2		0.7		0.4

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		0.4		0.6		1.2		1.9		2.5		2.6		2.4		2.1		1.4		0.8		0.5		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		2.1		0.9		1.2		1.7		2.8		3.4		3.4		3.2		3		2.2		1.6		1.1		0.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		0.7		0.8		0.9		1.9		2.3		2.2		2		2		1.5		1.3		0.9		0.5