BROOKLINE, MASSACHUSETTS

Average Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9		-2		-2		2		8		14		19		22		21		17		11		5		---

Average High Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14		2		2		7		14		20		25		28		27		23		17		10		4

Average Low Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		4		-7		-7		-2		2		8		13		16		15		11		6		1		-4

Highest Recorded Temperature

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		41.1		21.1		20.6		29.4		33.3		35.6		37.8		41.1		38.9		37.8		32.8		28.3		20

Lowest Recorded Temperature

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-28.3		-28.3		-28.3		-19.4		-12.8		-2.2		1.7		4.4		2.2		-3.9		-16.1		-13.9		-25.6

Average Number of Days Above 90F/32C

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13.8		---		---		---		0.1		0.6		3		5.6		3.6		0.9		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		126.2		27.5		25.2		21.9		8		0.3		---		---		---		0.1		3.9		13.7		25.3

Average Number of Days Below 0F/-17C

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.2		1.5		1.2		---		---		---		---		---		---		---		---		---		0.4

Average Precipitation

Years on Record: 113

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1135		102		96		103		96		86		88		86		97		90		89		105		98

Average Number of Days With Precipitation

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		117		10		9		10		11		11		10		10		9		9		8		10		10

Most Reported Precipitation in a Month

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		446		284		232		246		233		378		390		247		446		294		244		270		296

Least Reported Precipitation in a Month

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		21		19		---		20		11		5		9		18		9		3		18		5

Most Precipitation Reported in a Day

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		265.2		75.7		88.4		78.7		136.4		265.2		111.5		87.4		165.1		151.1		191.8		103.6		134.6

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

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		75		7		6		7		7		7		6		6		6		6		5		6		6

Avg. # of Days w/Precip. Above 0.4in/10mm

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29		3		3		3		2		2		2		2		2		2		2		3		3

Avg. No. of Days w/Precip. Above 1in/25mm

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		1		1		1		1		1		1		1		1		1		1		1		1

Average Snowfall

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		114.8		31		30.2		21.6		8.4		0.2		---		---		---		---		---		4.1		19.3

Most Snow Reported in a Month

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		333.2		104.1		126		90.9		333.2		7.6		---		---		---		---		2.5		53.3		86.6

Heating Degree Days

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2060.6		470.6		415.6		311.7		141.1		27.2		1.7		---		---		6.1		70.6		208.9		407.2

Cooling Degree Days

Years on Record: 94

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		370		---		---		---		1.7		15.6		66.7		135		106.7		40		4.4		---		---

Growing Degree Days

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1293.4		---		---		---		---		120.6		266.7		361.7		327.2		200		17.2		---		---

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		11.1		12.5		13.9		15.2		15.8		15.5		14.3		12.9		11.5		10.3		9.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.8		6.6		9.8		13.5		16.8		19.4		20.6		21.1		19.1		15.2		11		7		5.6

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		2.6		3.5		5.2		6.8		8.2		8.8		8.3		7.1		5.6		4		2.8		2.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.7		11.9		14.6		16.5		17.2		17.8		18		18.8		18.7		17.4		15.4		11.6		10.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.1		12.3		15.3		16.5		16.9		17.7		18.3		20.1		19.7		17.8		15.7		11.9		11

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.8		6.6		9.8		13.5		16.8		19.4		20.6		21.1		19.1		15.2		11		7		5.6

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		2.7		3.7		5.4		7.2		8.5		9.1		8.7		7.5		6		4.2		2.9		2.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.8		14.4		18.6		19.4		22.5		20.3		20.4		21.4		22		20.3		18.9		13.7		14.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.4		15.3		20.9		21.1		26.7		22.8		23.6		25.9		26.3		22.7		20.7		14.8		15.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.6		5.7		8.3		12		13.4		15.6		16.8		18.3		17.1		13		8.9		5.3		4.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		2.4		3		4.6		5.7		7.7		8.3		7.6		6.2		5		3.6		2.7		2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.6		9.3		11.4		14.3		13.5		14.3		14.7		16.4		16.6		14.3		11.6		7.7		7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.2		9.1		11.1		13.2		10.8		11.3		12.1		15.1		15.7		13		10.3		6.8		6.5