GILLIAM, WASHINGTON

Average Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11.9		0.9		4		7.5		11.1		15.2		19.4		23.8		23.3		18.4		12.2		5.5		1.8

Average High Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17.5		4.2		7.8		12.6		17.1		21.7		26.5		31.8		30.8		25.6		18.1		9.3		4.9

Average Low Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.3		-2.3		0.2		2.4		5.1		8.7		12.3		15.8		15.8		11.3		6.3		1.7		-1.3

Highest Recorded Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		45.6		21.1		23.9		26.1		35.6		37.8		41.7		45.6		45.6		40		31.7		26.7		20

Lowest Recorded Temperature

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-31.1		-27.8		-26.7		-15.6		-6.7		-3.3		2.2		4.4		5.6		---		-7.2		-23.9		-31.1

Average Number of Days Above 90F/32C

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40		---		---		---		---		1.2		5.4		16.4		13.2		3.7		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70.5		19.1		12.8		7		1.2		---		---		---		---		---		1.6		9.9		18.8

Average Number of Days Below 0F/-17C

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.3		1.2		0.4		---		---		---		---		---		---		---		---		0.1		0.6

Average Precipitation

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		491		58		45		50		42		46		30		15		19		22		43		64		58

Average Number of Days With Precipitation

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		108		14		11		11		10		8		7		3		4		5		8		13		14

Most Reported Precipitation in a Month

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		168		150		105		110		102		168		78		120		79		72		112		130		136

Least Reported Precipitation in a Month

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		11		10		11		4		7		6		---		---		---		---		13		12

Most Precipitation Reported in a Day

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		92.5		33.3		30.5		34.5		41.1		43.2		38.1		92.5		58.2		34		39.6		38.1		35.3

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		54.7		6.4		5		6.6		4.9		5.3		3.6		1.4		1.3		2.2		4.1		6.8		7.1

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

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		55		7		6		6		5		5		3		1		2		2		4		7		7

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

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9		1		1		1		1		1		1		---		---		---		1		1		1

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		8.8		1		0.9		1		0.7		1		0.7		0.2		0.4		0.3		0.6		1.2		0.8

Average Snowfall

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		43.4		16		7.4		2.8		---		---		---		---		---		---		0.2		4.6		12.4

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.7		2.1		1		0.2		---		---		---		---		---		---		---		0.5		1.9

Average Snow Cover

Years on Record: 47

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

Most Snow Reported in a Month

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		74.4		74.4		33.8		17.8		2.5		---		---		---		---		---		6.1		53.1		59.4

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		3.9		1.4		0.7		0.1		---		---		---		---		---		---		---		0.3		1.4

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		1.3		0.6		0.2		---		---		---		---		---		---		---		---		0.1		0.4

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		0.4		0.1		0.1		---		---		---		---		---		---		---		---		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		2712.2		521.7		393.9		318.9		207.2		106.1		38.3		5		5		55		179.4		366.1		515.6

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		531.7		---		---		---		2.2		16.1		76.7		182.8		179.4		72.8		1.7		---		---

Growing Degree Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1634.4		---		---		---		33.3		160.2		281.7		427.1		411.6		253.3		67.2		---		---

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		14.1		15.6		16.3		15.9		14.6		13		11.4		10		9.3

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		4.9		8.3		12.9		17.6		20.9		23.9		24.7		21.5		16.2		10.1		5.4		4.2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.1		2.9		4.3		6.3		7		8.8		9.4		9.4		8.1		6.9		4.9		3.2		2.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		8.2		12.1		15.7		18.5		19.3		20.7		22		21.4		18.7		13.8		8.5		6.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		7		11		14.1		19.1		20		23.4		24.9		22.9		18.3		13		7.5		6.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		4.9		8.3		12.9		17.6		20.9		23.9		24.7		21.5		16.2		10.1		5.4		4.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.7		3.2		4.7		6.8		7.3		9.1		10.6		10.4		8.6		7.6		5.4		3.6		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		9.9		13.8		18.7		21.2		23		24.5		24.6		22.9		22		17.1		10.6		7.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.7		8.5		13		17.6		22.7		26.1		28.7		27.9		24.8		22.1		16.6		9.5		7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.9		4.3		7.1		11.1		15.1		17.7		19.7		19.1		19.4		13		8.1		4.6		3.8

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		2.7		3.8		5.9		6.7		8.7		9.2		9		7.9		6.3		4.2		2.8		2.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.8		6.8		9.8		13		15.6		16.2		17.1		17		19.2		14.7		10.7		7		6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.8		5.8		8.8		10.9		15		14.4		16.5		16.3		19.7		13.2		9.6		5.9		5.4