JAMESTOWN, NEW YORK

Average Temperature

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9		-3		-3		1		7		14		18		21		20		16		11		4		-1

Average High Temperature

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15		1		1		6		13		21		25		27		27		23		17		8		2

Average Low Temperature

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-7		-8		-3		1		7		12		15		13		10		5		---		-5

Highest Recorded Temperature

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		37		22		21		27		32		33		36		37		37		36		31		26		20

Lowest Recorded Temperature

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-35		-35		-31		-23		-18		-5		---		2		1		-4		-8		-21		-27

Average Number of Days Above 90F/32C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		---		---		---		---		---		2		4		3		2		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		138		29		25		25		10		2		---		---		---		1		5		16		25

Average Precipitation

Years on Record: 61

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1090		80		70		80		80		80		100		100		80		90		80		90		90

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		1.7		0.8		0.8		1		1.3		1.8		2.5		2.8		2.8		2.3		1.6		1.3		0.9

Average Number of Rainy Days

Years on Record: 61

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

Average Dew Point

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-8		-7		-5		2		6		12		14		14		10		5		---		-5

Heating Degree Days

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4044.7		671.7		612.1		525.3		316.7		120.6		---		---		---		41.7		223.9		416.7		620

Cooling Degree Days

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		188.6		---		---		---		---		---		25		94.7		68.9		---		---		---		---

Growing Degree Days

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1335.8		---		---		---		---		137.8		275		353.1		327.2		208.3		34.4		---		---

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		15.4		14.3		12.9		11.5		10.3		9.7

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		65.7		84.5		76.2		69.1		61.3		56.9		55.5		53.1		52.3		55		64.2		76.6		83.1

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		61		81.6		72.7		64.7		56.9		51.2		49.4		45.6		46.9		49.4		60.7		73.2		80.1

Average Wind Speed

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		13.1		15.8		14.9		14.4		14.3		12.7		11.1		10.5		9.6		10.9		12.7		14.4		15.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.8		6		9.1		12		15.4		18		20.4		20.4		17.8		14.3		9.6		5.8		4.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		2.6		3.7		5.3		7.1		8.3		8.9		8.5		7.3		5.7		4.2		2.9		2.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		10.6		13.3		14.4		15.7		16.5		17.9		18.1		17.4		16.1		12.8		8.8		8.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.7		10.3		13.1		13.2		14.3		15.3		18.1		18.7		17.2		15.8		12		8.2		8.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.8		6		9.1		12		15.4		18		20.4		20.4		17.8		14.3		9.6		5.8		4.9

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		3.8		5.4		7.2		8.5		9.1		8.8		7.6		6		4.3		3		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		16.7		12.9		16.3		17.5		17.9		19.6		19.8		19.9		20.3		20		14.9		11.4		10.5

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.9		13.2		17.2		17.7		17.9		21.2		22.4		22.4		22.8		22.2		14.9		11.6		10.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.7		4.5		7.6		10.1		13		14.1		17.7		17.7		16.2		11.6		7.2		3.9		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		5.3		2.5		3.4		5		6.8		7.9		8.5		8.1		6.7		5.1		4.1		2.6		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		11.3		6.8		10.3		11.5		13		12.9		15.6		15.8		15.7		12.5		8.9		5.2		6.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.4		5.7		9.4		9.3		10.1		9.2		13.5		14		14.2		10.3		7		3.8		6.2