GROTTO, WASHINGTON

Average Temperature

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		49.4		35.1		39.6		42.2		47.8		54.5		59.4		63.4		63		58.6		50.9		41.6		37.1

Average High Temperature

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		59.4		40.5		47		51.8		59.1		67.1		71.4		77.1		75.9		71		60.8		48.4		42.3

Average Low Temperature

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		39.5		29.7		32.1		32.5		36.5		41.9		47.4		49.7		50		46.2		41.1		34.8		32

Highest Recorded Temperature

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		102		65		73		79		89		93		92		101		102		98		87		72		58

Lowest Recorded Temperature

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-4		-4		1		15		27		30		34		35		31		31		26		5		---

Average Number of Days Above 90F/32C

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.7		---		---		---		---		0.6		0.5		2		1.9		0.8		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		88.6		20.1		15.6		16.4		6.6		1.2		---		---		0.1		0.1		2		10.9		15.7

Average Number of Days Below 0F/-17C

Years on Record: 15

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

Average Precipitation

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		100.8		15.1		10.4		9.2		7.3		4		3.5		1.3		2.5		5.5		11.4		15		15.6

Average Number of Days With Precipitation

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		184		21		17		18		17		14		12		7		9		11		18		19		21

Most Reported Precipitation in a Month

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		28		26.1		19.7		14.6		15.8		8.8		9.1		2.7		5.7		16.4		24.1		28		22.1

Least Reported Precipitation in a Month

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		4.8		2.5		1.8		3.6		0.3		0.3		---		0.2		0.8		4.8		7.8		7.1

Most Precipitation Reported in a Day

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		6.7		4.2		4.2		2.6		3.2		1.8		2.4		1.6		1.7		2.9		4.8		6		6.7

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

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		144		19		14		16		13		9		8		3		6		8		14		16		18

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

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		71		10		8		7		5		3		2		1		2		4		8		10		11

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

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		5		3		2		2		1		1		---		---		2		4		5		5

Average Snowfall

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		75.3		28.3		11.3		10.6		1.4		0.1		---		---		---		---		---		7.6		16

Most Snow Reported in a Month

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		83		83		49		30.5		6		2		---		---		---		---		---		35		48

Heating Degree Days

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2923		616		437		398		225		91		18		1		2		23		155		403		554

Cooling Degree Days

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110		---		---		---		---		7		15		42		36		10		---		---		---

Growing Degree Days

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1525.8		---		---		---		---		139.5		282		415.4		403		258		27.9		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.5		10.8		12.5		14.3		15.8		16.6		16.2		14.7		13		11.3		9.8		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		3.6		1.3		2.2		3.2		4.5		5.3		5.7		6.2		5.4		4.1		2.4		1.4		1

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		0.8		1.1		1.7		2.1		2.5		2.7		2.6		2.2		1.8		1.2		0.8		0.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		2.1		3.3		4		4.7		4.8		4.9		5.5		5.4		4.8		3.3		2.3		1.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.8		1.9		2.9		3.4		4.4		4.6		5		6		5.6		4.7		3.1		2		1.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		1.3		2.2		3.2		4.5		5.3		5.7		6.2		5.4		4.1		2.4		1.4		1

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		0.9		1.3		1.8		2.1		2.5		2.7		2.9		2.3		2		1.4		1		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		4.7		2.6		3.9		4.9		5.8		5.9		5.8		6.7		6.1		5.7		4.3		3		2.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.9		2.4		3.5		4.6		6.1		6.6		6.7		7.7		6.7		5.7		4.2		2.6		2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3		1.1		1.7		2.9		3.9		4.7		4.8		4.8		4.8		3.4		2		1.2		0.9

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		0.7		1		1.6		2.1		2.5		2.6		2.5		2.2		1.7		1.1		0.7		0.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		1.8		2.4		3.5		3.9		4.3		4.1		4.3		4.8		3.9		2.6		1.8		1.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.8		1.5		2.1		2.9		3.2		3.6		3.4		3.7		4.5		3.5		2.3		1.5		1.3