ST. MARYS, ALASKA

Average Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-1.2		-12.9		-13.7		---		-3.7		6.1		10.4		12.9		11.8		7.1		-1		-8.5		-14.2

Average High Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.1		-9.8		-9.3		---		0.2		10.9		15.4		17.6		16.7		11.9		2.5		-4.9		-10.2

Average Low Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-5.7		-16.6		-18.2		---		-8		0.6		5.4		8.3		7.1		2.2		-4.7		-11.9		-18.2

Highest Recorded Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		28.9		7.8		5		15.6		25.6		26.7		28.3		28.9		22.8		13.9		6.1		5		28.9

Lowest Recorded Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-42.2		-42.2		-41.1		-35.6		-16.7		-3.3		-1.1		-1.7		-9.4		-25		-33.9		-40.6		-42.2

Average Number of Days Below 32F/0C

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		224		29		30.3		27.5		27.8		14.1		2.1		0.2		1.2		8.8		25		28.6		29.4

Average Number of Days Below 0F/-17C

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		58.6		13.2		14.6		3.1		---		---		---		---		---		0.5		5.9		16.3		5

Average Precipitation

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		484		26		18		20		20		21		53		68		80		59		40		41		38

Average Number of Days With Precipitation

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		139		10		7		8		8		9		13		15		18		15		14		11		11

Most Reported Precipitation in a Month

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		167		58		50		105		77		61		154		132		136		167		88		104		100

Least Reported Precipitation in a Month

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		---		---		---		---		3		11		23		3		8		1		6

Most Precipitation Reported in a Day

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		32.5		19.1		14.2		32.5		25.6		18		24.1		30.2		28.7		20.3		19.8		22.6		26.7

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

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59		3		2		2		3		3		7		8		9		7		5		5		5

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

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		---		---		---		---		---		1		1		2		1		1		1		1

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		1		0.5		0.6		0.5		0.7		1.1		1.6		2		1.9		1.4		0.9		0.7		0.6

Average Snowfall

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		172.2		24.1		12.7		20.3		13.7		2.8		2		---		---		2		14.7		38.1		41.7

Average Snow Cover

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		15		33		43		43		33		5		---		---		---		---		---		7		25

Most Snow Reported in a Month

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		103.6		49.5		43.9		101.8		45.7		25.6		31.5		---		---		35.3		45.2		71.4		103.6

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		76.8		73.7		77.1		71.9		74.9		72		71.2		78.1		83.3		82.5		81		78.3		77.8

Heating Degree Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5176.1		796.1		748.3		677.8		495.6		213.3		86.7		33.9		49.4		172.2		427.2		637.8		837.8

Cooling Degree Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.3		---		---		---		---		---		0.6		2.2		0.6		---		---		---		---

Growing Degree Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		157.2		---		---		---		---		12.1		88.3		56.8		---		---		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13.6		7.3		9.8		12.7		15.8		19.5		22.1		20.3		16.8		13.6		10.6		7.9		6.4

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		60.7		49.3		53.9		47		54.2		60.9		63.9		72.4		74.4		72.1		65.3		61.8		53.3

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		53.7		43.7		45.9		40.7		47.1		52.5		55		64.7		69.8		65		58.1		55.3		48.6

Average Wind Speed

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		18.1		21		23.6		21.2		19.4		16.6		14.7		14.4		15.5		15.8		16.3		19		20.1

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.9		0.8		2.9		7.5		13.7		18.7		19.9		16.3		11.7		8.4		4.5		1.4		0.3

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		0.6		1.9		4.5		7.1		8.9		10		9.3		7.6		4.9		2.8		1		0.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.1		2.2		6		11.7		16.9		17.5		17		14.3		11.3		10.7		8.2		4.2		1.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.9		1.9		5.1		9.8		16.1		20.7		20.4		14.7		9.1		10		7.3		3.5		0.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.9		0.8		2.9		7.5		13.7		18.7		19.9		16.3		11.7		8.4		4.5		1.4		0.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.2		0.6		2.5		5		7.3		9		10		9.5		8		5.2		3.1		1.1		0.4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13		2.8		9		15.5		22		20.8		19.8		18.4		16.6		13.2		10.2		5.5		2.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.3		2.5		8		14.2		22.7		26.5		27.1		23.4		18.1		13.3		9		4.8		1.9

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7		0.6		2.3		5.6		11.4		15.1		17.1		10.8		9		6.1		3.8		1.3		0.3

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		0.5		1.7		3.9		7		8.8		9.9		8.5		6.7		4.3		2.5		0.9		0.2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.6		1.5		4.2		7.8		13.6		13.7		14.5		9.3		8.5		6.9		6.4		3.5		0.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6		1.2		3.3		5.5		10.7		13.2		14.9		4.9		5.1		5.1		5.8		2.9		0.2