BARTER ISLAND, ALASKA

Average Temperature

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		9		-14		-20		-15		-1		21		34		40		39		31		15		---		-12

Average High Temperature

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		15.4		-7.7		-13.9		-8.8		6.7		26.3		38.4		45.4		43.8		35.4		20.3		5.1		-5.8

Average Low Temperature

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		4.1		-20.3		-26.3		-22.5		-9.3		15.7		30.4		34.8		34.4		27.9		10.1		-6.7		-18.3

Highest Recorded Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		78		39		37		36		43		52		68		78		72		66		46		37		37

Average Number of Days Below 32F/0C

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		310		31		28		31		30		31		23		9		11		25		31		30		31

Average Number of Days Below 0F/-17C

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		149.1		28.6		26.9		23.2		2.8		---		---		---		---		6.9		20.5		28.2		12

Average Precipitation

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		6.2		0.5		0.2		0.2		0.2		0.3		0.5		1		1.1		0.7		0.8		0.4		0.3

Average Number of Days With Precipitation

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		89		5		5		5		6		6		6		8		12		10		12		8		6

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		3.2		0.4		0.4		0.2		0.5		0.4		0.8		3.2		2.6		1.5		1.4		0.4		0.4

Least Reported Precipitation in a Month

Years on Record: 30

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

Most Precipitation Reported in a Day

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		2.2		2.2		1.2		0.5		0.4		0.7		1.2		1.6		0.9		0.9		2		0.4		0.5

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

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		18		1		1		1		---		1		2		3		3		2		2		1		1

Average Number of Rainy Days

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		87		5		5		5		6		6		6		8		12		10		12		8		5

Average Snowfall

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		41.8		5		2.7		2.6		2.4		3		1.6		0.5		1.5		4.9		9.2		5		3.4

Average Snow Cover

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		7		12		14		14		15		10		1		---		---		1		5		8		10

Most Snow Reported in a Month

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		35		35		15.3		15		12.2		11.1		9.4		3.8		7.4		22.8		32.1		20.2		12.9

Average Morning Relative Humidity

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		79		70		69		67		73		86		89		89		91		90		84		75		70

Average Evening Relative Humidity

Years on Record: 40

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		78		70		67		67		74		84		87		86		88		87		83		75		70

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9999.9		2440		2267		2423		1967		1391		903		763		815		1016		1564		1978		2346

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13.5		---		8.6		12.9		20		24		24		24		21		14.3		9.8		3.7		---

Average Number of Clear Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53		4		10		12		9		3		3		3		1		2		2		5		---

Average Number of Cloudy Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		192		8		12		11		13		22		20		19		24		24		24		15		---

Average Number of Partly Cloudy Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		66		3		6		8		8		6		7		9		6		4		5		4		---

Average Wind Speed

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		13.2		15.1		14.4		13.7		12		12.7		11.6		10.9		11.8		13.2		14.8		14.9		13.9

Highest Reported Hourly Wind Speed

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		75		75		69		66		49		56		53		48		58		58		69		61		70

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		---		0.3		1.4		3.7		5.7		7.1		6.1		3.9		2		0.6		---		---

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.3		---		0.2		0.9		1.9		2.5		3.5		3.2		1.9		1.2		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		3		---		0.8		2.6		5.2		6.1		6.1		5.4		4.3		3.1		1.6		0.7		---

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		---		0.7		2.3		5.6		8.9		9.9		8.5		5.6		3.2		1.4		---		---

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		---		0.3		1.4		3.7		5.7		7.1		6.1		3.9		2		0.6		---		---

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		---		0.2		1.1		2.2		2.5		3.5		3.3		2		1.2		0.5		---		---

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		---		1.2		4.1		6.4		6.8		6.6		5.9		5.2		3.7		1.8		0.9		---

Maximum 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		7		10.8		11.4		10.2		7.5		4.2		1.6		---		---

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		---		0.2		1		3.2		5.1		6.5		5.2		3.3		1.8		0.5		---		---

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		---		0.2		0.8		1.8		2.4		3.4		3.1		1.9		1.1		0.4		---		---

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		---		0.6		1.4		4.2		4.9		5.5		4.5		3.5		2.6		1.3		0.5		---

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		---		0.5		1		4.1		7.2		8.2		6.2		3.9		2.7		1.1		---		---