VASHON, WASHINGTON

Average Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		50.7		38.7		41.3		44.4		49		54.3		58.9		62.9		62.8		58.5		51.5		45.4		41

Average High Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		59		43.8		47.2		52.1		58.6		64.5		69.7		74.7		74		68		58.3		51		45.7

Average Low Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		42.5		33.8		35		36.7		39.7		44.1		48.2		51.1		51.6		49.1		44.7		39.7		36.3

Highest Recorded Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		98		66		69		78		85		88		95		96		98		93		83		78		64

Lowest Recorded Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		7		8		9		21		25		29		32		38		40		32		21		18		7

Average Number of Days Above 90F/32C

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.9		---		---		---		---		---		0.1		0.4		0.4		---		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39.2		11.5		8.7		6.1		1.7		0.1		---		---		---		---		0.4		3.1		7.5

Average Precipitation

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		42.6		6.4		5		3.7		2.5		2		1.5		0.7		0.8		2.1		4		6.8		7.2

Average Number of Days With Precipitation

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		129		16		14		13		11		9		7		3		4		7		12		16		17

Most Reported Precipitation in a Month

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		26.7		17		10.5		9.1		6.9		4.3		5.2		2.9		2.6		5.2		10.3		13.3		26.7

Least Reported Precipitation in a Month

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		1.2		0.1		0.2		0.6		0.2		---		---		---		0.3		0.1		1.2		1.8

Most Precipitation Reported in a Day

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		4.3		3.2		3.9		2.6		2.5		1.3		1.2		1.2		1.1		2		2.2		4.3		3.2

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

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		93		13		10		9		7		6		4		2		2		5		9		12		14

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

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27		5		3		2		1		1		1		---		---		1		3		5		5

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

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7		1		1		---		---		---		---		---		---		---		1		2		2

Average Snowfall

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		7.7		3.8		1.8		0.5		---		---		---		---		---		---		---		0.5		1.1

Most Snow Reported in a Month

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		20		19.5		20		11.3		0.5		---		---		---		---		---		---		7.5		7.7

Heating Degree Days

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2358		505		388		330		188		69		10		---		1		16		128		288		435

Cooling Degree Days

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64		---		---		---		---		1		7		26		24		6		---		---		---

Growing Degree Days

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1498.5		---		---		---		---		133.3		267		399.9		396.8		255		46.5		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.6		10.9		12.5		14.2		15.8		16.6		16.1		14.7		13		11.3		9.9		9.1

Average Daily Solar Radiation - Global

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		4.1		5		5.5		5.9		5.2		4.1		2.3		1.3		0.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.7		1.1		1.6		2.1		2.5		2.7		2.5		2.2		1.8		1.2		0.8		0.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		1.8		2.8		3.5		4.2		4.6		4.8		5.2		5.2		4.7		3.1		1.9		1.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.4		1.5		2.5		2.9		3.5		4.1		4.6		5.5		5.2		4.5		2.9		1.6		1.3

Maximum Daily Solar Radiation - Global

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		4.1		5		5.5		5.9		5.2		4.1		2.3		1.3		0.9

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.8		0.8		1.2		1.8		2.2		2.5		2.7		2.6		2.3		2		1.4		0.9		0.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		2.4		3.5		4.7		5.2		5.7		5.8		6.4		5.9		5.6		4.1		2.6		1.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		2.1		3.3		4.3		5.2		6.3		6.6		7.4		6.4		5.5		4		2.3		1.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.7		0.9		1.4		2.4		3.4		4.3		4.6		4.1		4.4		3.5		2		1.1		0.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.6		0.9		1.5		2.1		2.4		2.6		2.5		2.2		1.7		1.1		0.7		0.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		1.4		1.9		2.7		3.4		3.9		4.1		3.7		4.3		3.9		2.6		1.5		1.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.3		1.1		1.5		1.9		2.4		3		3.2		2.7		3.7		3.5		2.3		1.2		1