COLCHESTER, CONNECTICUT

Average Temperature

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		48.7		26.8		27.1		36		46.2		57		65.6		70.7		68.7		62.3		52		41.1		30.3

Average High Temperature

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		59		35.8		36.4		45.7		57.3		68.9		76.9		81.6		79.6		73.3		63.1		50.5		39.1

Average Low Temperature

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		38.3		17.8		17.7		26.4		35.1		45.1		54.3		59.7		57.9		51.2		40.9		31.7		21.5

Highest Recorded Temperature

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		100		68		71		85		91		92		98		100		100		99		90		80		68

Lowest Recorded Temperature

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-23		-18		-23		-12		8		23		32		35		32		25		14		6		-16

Average Number of Days Above 90F/32C

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.8		---		---		---		---		0.2		1.2		2.5		1.4		0.5		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		141.1		28.2		26.1		23.6		11.2		1.5		---		---		---		0.8		6.8		16.7		26.2

Average Number of Days Below 0F/-17C

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.3		2.1		2.2		0.1		---		---		---		---		---		---		---		---		0.9

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		53.3		5		3.6		4.8		4.7		4.2		4.1		3.8		4.7		4.2		4.7		5		4.6

Average Number of Days With Precipitation

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		101		8		7		9		9		10		9		9		9		8		7		8		8

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		17.6		12.5		8.7		9.8		12.8		9.3		17.6		9		10.9		9		9.8		10.7		10.4

Least Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		0.4		0.6		0.8		0.8		1.4		0.8		0.4		0.4		0.4		1		1		0.6		0.6

Most Precipitation Reported in a Day

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		5.2		3		4		2.9		3.8		3.9		3.1		3.6		4.4		4.8		5.2		4.2		3.4

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

Years on Record: 81

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

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

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		33		3		3		3		3		3		2		3		3		2		2		3		3

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

Years on Record: 81

		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: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		39.5		9.8		11.9		6.8		1.2		---		---		---		---		---		0.3		1.9		7.6

Most Snow Reported in a Month

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		42		37.5		42		36		9.5		0.3		---		---		---		---		6		23.5		24.7

Heating Degree Days

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3965		874		789		590		282		60		4		---		---		21		156		423		766

Cooling Degree Days

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		503		---		---		---		1		17		89		188		145		58		5		---		---

Growing Degree Days

Years on Record: 81

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2337.4		---		---		---		---		217		468		641.7		579.7		369		62		---		---

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		15.4		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
kWh/m2		3.7		1.8		2.7		3.7		4.5		5.2		5.5		5.7		5		4.1		3		1.9		1.5

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		0.7		1		1.4		1.9		2.3		2.5		2.3		2		1.6		1.1		0.8		0.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.2		3.3		4		4.4		4.6		4.7		4.8		5.1		4.9		4.7		4.1		3.1		2.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.2		3.4		4.1		4.4		4.3		4.5		4.7		5.2		4.9		4.7		4.1		3.2		3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		1.8		2.7		3.7		4.5		5.2		5.5		5.7		5		4.1		3		1.9		1.5

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		0.7		1.1		1.5		2		2.4		2.5		2.4		2.1		1.7		1.2		0.8		0.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5		4.2		5.2		5.1		5.5		5.5		5.4		5.8		5.6		5.4		5		3.9		3.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		4.5		5.8		5.4		5.9		6		6.1		6.8		6.3		5.9		5.5		4.2		4.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.1		1.5		2.2		3.2		3.5		4.1		4.5		5		4.5		3.5		2.5		1.5		1.2

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		0.6		0.8		1.4		1.8		2.2		2.4		2.2		1.9		1.4		1		0.7		0.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.4		2.6		3		3.8		3.5		3.8		4		4.5		4.4		3.8		3.3		2.3		2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3		2.4		2.7		3.4		2.7		2.8		3.2		4.1		4		3.4		2.9		2.1		1.8