SUNNYSIDE, WASHINGTON

Average Temperature

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11.1		-0.6		2.8		7.2		11.3		15.6		19.3		22.4		21.5		17.1		11.2		4.6		0.4

Average High Temperature

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18.6		3.8		8.4		14.6		19.5		24		27.9		32.3		31.4		26.4		19.4		10.3		4.4

Average Low Temperature

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.6		-5		-2.8		-0.1		3.1		7.2		10.6		12.6		11.6		7.7		2.9		-1.1		-3.7

Highest Recorded Temperature

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		44.4		21.1		22.2		27.8		35.6		40		41.7		44.4		42.2		39.4		31.7		25		20.6

Lowest Recorded Temperature

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-34.4		-32.2		-28.3		-13.9		-15.6		-4.4		---		3.9		2.2		-7.8		-11.1		-30.6		-34.4

Average Number of Days Above 100F/38C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.1		---		---		---		---		0.1		0.5		3.4		2		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		44.3		---		---		---		0.1		2		6.4		17.2		14.9		3.8		---		---		---

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		104.3		---		---		---		1.9		9		18.2		28.1		28.2		16.5		2.4		---		---

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		162.5		---		0.1		1.8		9.8		22		28.6		31		30.9		27.1		10.8		0.4		---

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		226.5		0.7		2.5		14.9		24.5		30.5		29.9		31		31		29.7		26		5.2		0.5

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		283.4		6.2		14.3		27.7		29.8		31		30		31		31		30		30.3		17.7		4.5

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		323		16.7		23.2		30.5		30		31		30		31		31		30		31		26.1		12.5

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		364.6		31		28		31		30		31		29.9		30.7		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		345		31		28		31		30		30.2		26.8		21.6		24.8		29.6		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		267.4		31		28		30.8		28.7		20.7		10.2		3.1		4.3		20.1		29.9		29.6		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		186.2		30.5		26.8		25.2		16.9		5.8		0.3		---		---		3.3		20.1		26.6		30.6

Average Number of Days Below 32F/0C

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		128.4		26.8		21.8		17.3		7.5		1.2		---		---		---		0.6		8.1		19		26

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		18.9		5.6		2.8		0.4		---		---		---		---		---		---		0.1		2.2		7.9

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		4.2		1.3		0.9		---		---		---		---		---		---		---		---		0.3		1.8

Average Number of Days Below 0F/-17C

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.2		1.2		0.4		---		---		---		---		---		---		---		---		0.1		0.6

Average Precipitation

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		173		23		16		11		12		14		14		5		6		11		15		23		24

Average Number of Days With Precipitation

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		56		7		6		4		4		4		4		2		2		3		5		7		8

Most Reported Precipitation in a Month

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		81		73		67		54		44		61		63		26		37		67		66		81		77

Least Reported Precipitation in a Month

Years on Record: 117

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

Most Precipitation Reported in a Day

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		46.2		30.7		14		17.3		25.4		40.6		46.2		15.5		22.4		36.1		27.4		26.7		22.4

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		23.8		2.9		2.4		2.1		1.8		2.1		1.4		0.5		0.8		1.2		1.9		3.1		3.6

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

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24		3		2		2		2		2		2		1		1		1		2		3		3

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		1.7		0.2		---		0.1		0.3		0.1		0.2		---		0.1		0.2		0.1		0.2		0.2

Average Snowfall

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		31.8		11.7		4.8		0.5		---		---		---		---		---		---		---		4.6		10.2

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.7		1.9		0.8		0.1		---		---		---		---		---		---		---		0.8		3.1

Average Snow Cover

Years on Record: 51

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

Most Snow Reported in a Month

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		114.3		88.9		42.7		9.7		2		---		---		---		---		---		2.5		114.3		114.3

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		3.7		1		0.3		0.1		---		---		---		---		---		---		---		0.5		1.8

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		0.7		0.2		0.1		---		---		---		---		---		---		---		---		0.1		0.3

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		0.2		0.1		---		---		---		---		---		---		---		---		---		---		0.1

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5110		972		739		571		364		168		46		6		7		95		387		720		1037

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		767		---		---		---		4		47		125		281		240		67		2		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3042		1		3		32		128		347		530		741		697		424		126		12		1

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.7		10.9		12.5		14.2		15.6		16.4		16		14.6		13		11.4		10		9.2

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		4.8		8.3		13.5		18.5		22.1		24.9		25.6		22.4		16.9		10.6		5.7		4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.2		2.8		4.3		6.4		7.1		8.8		9.4		9.7		8.5		7.1		5		3.2		2.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16		7.8		11.9		16.5		19.5		20.4		21.6		22.8		22.3		19.6		14.5		9		6.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.4		6.7		11		15.1		20.4		22		25.1		25.9		23.9		19.4		13.9		7.9		5.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		4.8		8.3		13.5		18.5		22.1		24.9		25.6		22.4		16.9		10.6		5.7		4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7		3		4.8		6.9		7.3		9.4		10.8		11.8		10.2		7.5		5.4		3.8		2.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.4		8.8		14.6		19.1		21.2		23.5		24.8		25.9		24.7		21.8		17.1		11.4		7.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19		7.6		13.9		18.1		22.8		26.6		28.8		28.1		25.6		21.9		16.6		10.4		7.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13		4		6.5		11.5		16.7		19.4		22.2		22.2		20.7		15.1		9.4		5		3.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.6		3.6		6		6.8		8.7		9.2		8.9		8		6.6		4.6		3		2.2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.9		6.3		8.9		13.7		17.5		17.8		19.2		19.8		20.6		17.4		12.5		7.7		4.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		5.2		7.7		11.7		17.6		17.4		20.8		21.6		21.8		16.6		11.7		6.6		4.2