NANTUCKET, MASSACHUSETTS

Average Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9		1		---		2		6		11		16		19		19		16		12		7		2

Average High Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		4		3		5		10		15		20		23		23		20		16		11		6

Average Low Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6		-2		-3		-1		3		7		12		16		16		13		8		4		-1

Highest Recorded Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		35		13		13		16		22		25		31		32		35		28		25		20		14

Lowest Recorded Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-16		-15		---		-13		-6		-1		3		10		9		1		-1		-6		-16

Average Number of Days Below 32F/0C

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		93		24		21		19		3		---		---		---		---		---		---		5		19

Average Number of Days Below 0F/-17C

Years on Record: 12

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Average Precipitation

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1120		110		100		110		100		80		40		60		100		80		70		100		100

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		1.9		1		0.9		1.1		1.5		2		2.9		3.3		3.2		2.6		1.9		1.5		1.1

Average Number of Rainy Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		76		7		7		7		6		6		3		5		7		5		5		6		7

Average Snowfall

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		80		15		24		21		2		---		---		---		---		---		---		---		15

Average Dew Point

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6		-3		-3		-1		3		7		13		17		16		13		8		3		-1

Heating Degree Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3581.4		542.5		510.1		499.4		341.7		215.3		66.7		---		---		41.7		172.2		308.3		490.8

Cooling Degree Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		103.4		---		---		---		---		---		---		60.3		43.1		---		---		---		---

Growing Degree Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1140.8		---		---		---		---		43.1		183.3		318.6		301.4		208.3		86.1		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.1		11.1		12.5		13.9		15.1		15.7		15.3		14.2		12.9		11.5		10.4		9.8

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		63.8		65.2		61.7		65.6		66.2		66.9		68		65.8		63		58.1		59.1		63.3		62.3

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		57.6		60.7		55.2		60.8		61.4		62		59.9		56.7		55.9		52		53.5		57.4		57.3

Average Wind Speed

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		16.2		18.3		18.6		18.5		17.5		15.8		14.5		13.7		12.9		13.9		15.4		16.9		18

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.5		6.2		9.4		13.7		17.7		21.3		22.5		22.1		19.9		16.6		12		7.3		5.5

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		2.7		3.7		5.2		6.8		7.9		8.5		8.1		7		5.4		4		3		2.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.2		10.1		13.2		16.5		18.1		19.5		19.6		19.7		19.6		19.1		17		11.7		9.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17		10		13.5		16.4		18.3		21		21.6		21.7		21		20.4		17.8		12		9.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.5		6.2		9.4		13.7		17.7		21.3		22.5		22.1		19.9		16.6		12		7.3		5.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		2.8		3.9		5.5		7.2		8.5		9.1		8.7		7.3		6		4.2		3.1		2.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.1		12.8		18.2		19.8		21.6		22.3		21.6		22.1		22.5		21.9		20.5		14.6		11.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.1		13.3		21		21.5		24.7		27.1		26.3		27.4		27.2		25.3		23.1		16		12.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		5.2		7.2		11.9		13.9		17.7		18.6		19.1		18.6		13.3		10.8		5.2		4.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.8		2.6		3.1		4.8		6		7.1		7.9		7.3		6.1		4.7		3.3		2.7		2.3

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13		7.8		9.1		13.9		14		16.2		16.3		17.1		18.1		14.6		14.6		7.2		6.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.8		7		7.8		12.5		11.3		14.5		14.7		16.3		18.3		13.2		14.4		6		5.9