GUSTAVUS, ALASKA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		41.2		27.5		29.6		33.2		40.1		46.9		52.7		55.9		55		48.9		41.1		32.8		29.6

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		48.4		32.9		35.9		40.8		48.9		56		61.7		63.8		63.1		56.9		47.5		38.4		34.2

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		33.9		22.1		23.2		25.6		31.4		37.8		43.6		48		46.9		41		34.6		27.1		25

Highest Recorded Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		87		54		55		53		70		83		83		86		87		73		65		57		56

Lowest Recorded Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-25		-25		-16		-13		4		23		29		33		25		23		13		-6		-17

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.8		---		---		---		---		---		0.3		0.3		0.2		---		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.7		---		---		---		---		1.2		3.1		3.4		3.6		0.5		---		---		---

Average Number of Days Above 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		79.2		---		---		---		0.9		8.8		17.4		23.7		21.2		7.1		0.1		---		---

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		165.9		0.1		0.1		0.6		10.7		25.1		29.5		31		31		28.5		8.9		0.3		---

Average Number of Days Above 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		263.8		4.7		7.2		19.3		29.1		30.9		30		31		31		30		29.7		14.1		6.7

Average Number of Days Below 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		365		31		28		31		30		31		30		31		31		30		31		30		31

Average Number of Days Below 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		364.2		31		28		31		30		31		29.9		30.5		30.8		30		31		30		31

Average Number of Days Below 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		338.8		31		28		31		29.8		30.5		27.5		19.7		20.9		28.3		30.9		30		31

Average Number of Days Below 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		243.8		30.8		27.8		30.8		27.6		18.2		6.7		2.3		4.5		11.1		24.4		28.8		30.7

Average Number of Days Below 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		147.9		23.9		21		23.2		15.6		6.2		1.1		0.2		0.5		3.3		10.2		19.7		22.9

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		44.2		10.5		9.5		6.9		1.8		0.1		---		---		---		---		1.1		6.5		7.8

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17.9		5.2		4.3		2.4		0.2		---		---		---		---		---		0.1		2.2		3.5

Average Number of Days Below 0F/-17C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.5		2.4		1.3		0.4		---		---		---		---		---		---		---		0.5		0.8

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		59.4		5.4		4.6		3.2		2.7		3		2.9		4.2		5.3		7.6		8.2		6.4		6

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		224		20.2		16.3		17.7		17.1		15.8		15.4		17.2		18.2		21.3		23.6		20.5		20.7

Avg. No. of Days w/Precip. Above 0.1in/2.5mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		144.6		13.5		10.1		10.2		8.5		9.5		8.5		10.2		12.5		15.2		17.8		14.7		13.9

Avg. No. of Days w/Precip. Above 0.5in/13mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35.4		3.3		1.8		1.5		1.3		1.3		1.2		2.2		3		5.5		6.1		3.9		4.3

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.1		0.8		0.5		---		0.3		0.1		0.1		0.4		0.5		1.4		1.6		1.2		1.2

Average Precipitable Water

Years on Record: 20

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

Average Number of Rainy Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		90.7		8.2		6.2		6		5.6		5.9		4.6		6.8		6.9		9.9		12.3		9.7		8.6

Average Snowfall

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		66.1		16.6		12.2		11		1.1		0.3		---		---		---		---		0.7		7		17.2

Average Dew Point

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		35		18		24		25		31		39		46		50		50		45		36		29		25

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8701		1162		993		986		746		561		371		283		311		482		742		967		1097

Cooling Degree Days

Years on Record: 30

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

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		495		---		---		---		2		21		97		184		158		32		1		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13.2		8.1		10.1		12.6		15.3		17.9		19.5		18.5		16		13.4		10.8		8.6		7.3

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		75		77.1		75.8		69.5		67.3		66.7		72.1		81.7		77.1		80.7		79.1		76.5		76.4

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		68		70.2		65.7		61.6		56.9		58.4		66		75.8		71.1		75.8		74.1		71.1		71.1

Average Wind Speed

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		5		4.7		5		6.3		5.4		5.3		4.3		3.8		3.9		4.6		5.8		5.8		5.5

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		0.4		1.1		2.2		3.8		4.9		5.2		4.8		3.9		2.5		1.4		0.6		0.2

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		0.3		0.7		1.3		2		2.6		2.8		2.6		2.2		1.5		0.9		0.4		0.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.8		0.9		2		3.2		4.1		4.5		4.5		4.2		3.8		3		2.2		1.2		0.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		0.7		1.6		2.6		3.8		4.5		4.6		4.2		3.4		2.7		1.9		1.1		0.4

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		0.4		1.1		2.2		3.8		4.9		5.2		4.8		3.9		2.5		1.4		0.6		0.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.3		0.8		1.4		2		2.6		2.8		2.6		2.2		1.6		0.9		0.5		0.2

Maximum 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		1.1		2.3		3.7		5.3		5.1		5.2		4.8		4.6		4.1		2.6		1.6		0.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.5		0.9		1.9		3.2		5.3		5.7		6.1		5.3		4.7		4.1		2.3		1.4		0.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.2		0.3		0.9		1.6		3.2		4.1		4.6		4.3		3.2		1.8		1.1		0.4		0.2

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		0.3		0.6		1.2		2		2.6		2.7		2.6		2.1		1.3		0.8		0.3		0.2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.2		0.7		1.5		1.9		3.4		3.7		4		3.8		3.1		1.9		1.7		0.8		0.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.8		0.5		1.1		1.3		2.7		3		3.6		3.3		2.2		1.3		1.4		0.6		0.3