PORT SAN JUAN, ALASKA

Average Temperature

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5		-0.9		-0.9		---		2.9		6.9		10.7		13.1		13		9.3		4.6		0.9		-0.1

Average High Temperature

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.1		1.6		1.7		---		6.2		11		14.9		16.5		16.5		12.6		7.5		3.6		2.3

Average Low Temperature

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		1.9		-3.2		-3.4		---		-0.4		2.8		6.6		9.7		9.6		6.1		1.7		-1.7		-2.6

Highest Recorded Temperature

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		28.3		9.4		10		16.7		21.7		27.8		28.3		25.6		18.9		14.4		11.1		11.1		28.3

Lowest Recorded Temperature

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-20.6		-20.6		-18.3		-12.8		-5		-2.8		-1.1		-1.1		-2.8		-12.8		-16.7		-14.4		-20.6

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		0.3		---		---		---		---		---		0.2		0.1		---		---		---		---		---

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		5.7		---		---		---		---		0.1		1.5		2.5		1.5		---		---		---		---

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		51		---		---		---		---		3.1		11.6		18.1		16		2.2		---		---		---

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		137.8		---		---		---		1.8		16.5		28.1		31		31		25.8		3.6		0.1		---

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		233.7		5.5		3.6		6.5		21.5		30.7		30		31		31		30		26.6		10.9		6.5

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		365		31		28		31		30		31		30		31		31		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		327.2		31		28		31		30		31		27.1		14.4		15.5		27.3		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		236.4		31		27.9		31		29.6		22.8		4.1		0.3		0.2		6.7		23.7		28.5		30.6

Average Number of Days Below 32F/0C

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		146		29		22.8		20.4		16.4		3.8		0.1		---		---		1.1		10.4		19.8		22.6

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		25		6.5		6.3		3.6		0.5		---		---		---		---		---		0.4		3.1		4.5

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		3		0.9		1.2		0.4		---		---		---		---		---		---		---		0.3		0.4

Average Number of Days Below 0F/-17C

Years on Record: 31

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

Average Precipitation

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		3356		339		286		237		238		171		122		129		224		374		447		364		426

Average Number of Days With Precipitation

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		213		21		18		18		17		16		14		15		14		19		21		19		21

Most Reported Precipitation in a Month

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		878		724		525		441		556		449		413		301		518		663		762		849		878

Least Reported Precipitation in a Month

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		19		59		19		24		38		47		45		45		37		128		212		68		112

Most Precipitation Reported in a Day

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		180.6		123.4		99.3		73.4		83.8		74.9		85.3		63.8		139.2		109.7		180.6		104.9		97

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		174		17.2		14.7		14.5		14.2		11.6		9.7		10.4		12.4		16		18.3		16.6		18.4

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

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		174		17		15		15		14		12		10		10		12		16		18		17		18

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

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		89		9		8		7		7		5		3		3		6		9		11		10		11

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		89.5		9.3		7.5		6.8		6.8		4.8		3		3.1		6.4		9.8		11.1		10		10.9

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

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		47		5		4		3		3		2		1		1		3		6		7		6		6

Average Snowfall

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		272.3		53.1		57.7		47.2		16.3		1.3		---		---		---		---		3.8		31.2		61.7

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39.6		8.6		7.3		7.1		2.5		0.2		---		---		---		---		0.7		4.6		8.6

Average Snow Cover

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		12		27		40		33		20		2		---		---		---		---		---		5		25

Most Snow Reported in a Month

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		193.6		132.1		193.6		159.3		104.1		26.7		---		---		---		---		31.8		130.8		150.4

Avg. No. of Days w/Snow Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28		5.8		5.3		5.2		1.8		0.1		---		---		---		---		0.5		3.4		5.9

Avg. No. of Days w/Snow Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12.8		2.7		2.8		2.3		0.9		---		---		---		---		---		0.2		1.2		2.7

Avg. No. of Days w/Snow Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.4		1.1		1.6		1.5		0.3		---		---		---		---		---		0.1		0.4		1.4

Avg. No. of Days w/Snowfall Above 10in/25cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.6		0.2		0.3		0.4		0.1		---		---		---		---		---		---		0.2		0.4

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8710		1065		965		1009		829		635		402		284		301		483		766		943		1028

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		465		---		---		---		---		9		78		182		166		29		1		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13.3		7.8		10		12.6		15.5		18.4		20.4		19.2		16.3		13.5		10.7		8.3		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		8.8		1.1		3.2		7.5		12.8		17.2		18.8		16.4		13.3		8.8		4.6		1.7		0.6

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		0.8		2.2		4.6		7.1		8.9		9.9		9.3		7.8		5		2.9		1.2		0.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.8		2.5		6.2		10.9		14.2		15.8		16		14.4		13.2		10.8		7.5		4.2		1.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.2		2.2		5.1		8.9		13.1		16.8		17.5		14.1		11.8		9.9		6.7		3.6		1.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.8		1.1		3.2		7.5		12.8		17.2		18.8		16.4		13.3		8.8		4.6		1.7		0.6

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		0.9		2.6		5.1		7.2		9		10		9.5		8		5.4		3.5		1.4		0.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.7		3		8.7		14.9		19.2		20.1		19.4		17.8		18.1		13.9		10.7		5.3		1.9

Maximum 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		2.8		7.5		13.2		19.4		25		24.9		20.9		20.3		13.9		9.9		4.6		1.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.4		1		2.7		5.7		8.8		12.7		11.8		13.5		10.6		6		3.1		1.3		0.5

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.6		0.8		1.9		4.1		6.3		8.5		9.1		9.1		7.4		4.4		2.2		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
Mj/m2		6.7		2.1		4.5		7.2		8.7		11.4		10.1		11.8		10		6.4		4.4		2.5		1

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.7		1.8		3.7		4.9		5.6		8.3		5.4		8.9		6.8		4.3		3.5		1.9		0.9