O BRIEN, OREGON

Average Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.4		2.9		4.9		6.4		9.2		12.6		15.9		18.9		18.1		15.4		10.5		6.2		3.8

Average High Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17.9		7.1		10.2		12.8		17.1		21.4		25.2		29.8		29		25.3		17.8		11.1		7.6

Average Low Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2.9		-1.3		-0.3		0.1		1.3		3.8		6.5		7.9		7.2		5.4		3.2		1.3		-0.1

Highest Recorded Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40.6		19.4		22.2		27.2		32.2		34.4		39.4		40.6		39.4		38.9		31.1		21.7		18.9

Lowest Recorded Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-18.9		-17.8		-15.6		-7.8		-6.7		-6.1		-1.7		---		-1.7		-6.1		-6.1		-9.4		-18.9

Average Number of Days Above 90F/32C

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		26.6		---		---		---		0.1		0.8		3.9		10.8		8.5		2.6		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		113.1		21.2		17.6		17.9		12.3		4.6		0.5		0.1		0.2		1.7		6.9		12.7		17.5

Average Number of Days Below 0F/-17C

Years on Record: 39

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

Average Precipitation

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		2393		434		314		394		143		48		19		8		13		63		176		398		382

Average Number of Days With Precipitation

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		120		17		15		16		11		8		4		1		2		4		10		15		17

Most Reported Precipitation in a Month

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1215		848		605		819		328		226		139		134		94		185		705		1006		1215

Least Reported Precipitation in a Month

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		57		38		32		10		---		---		---		---		---		11		37		113

Most Precipitation Reported in a Day

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		237.2		157.5		163.8		147.6		71.6		62.2		41.4		101.1		41.7		89.4		167.6		206.2		237.2

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

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		94		14		12		13		8		5		3		1		1		3		8		12		14

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

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		51		9		7		7		3		2		1		---		---		1		4		8		9

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

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29		6		4		4		1		1		---		---		---		---		2		5		6

Average Snowfall

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		57.1		24.9		12.9		8.9		0.8		---		---		---		---		---		0.2		1.8		7.6

Average Snow Cover

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		---		5		2		---		---		---		---		---		---		---		---		---		---

Most Snow Reported in a Month

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		137.9		137.9		75.2		46		8.9		2		---		---		---		---		5.1		30.5		69.8

Heating Degree Days

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1467.8		305.6		222.2		196.7		113.9		47.2		10.6		1.1		0.6		10		82.2		198.3		279.4

Cooling Degree Days

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		103.3		---		---		---		---		1.7		16.1		46.1		32.8		6.7		---		---		---

Growing Degree Days

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		960.1		---		---		---		---		79.2		176.7		275.6		251.4		161.7		15.5		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.1		11.1		12.5		13.9		15.1		15.8		15.4		14.3		12.9		11.5		10.3		9.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.4		6.1		9.3		13.3		17.4		21.8		25.2		26.5		23.3		18.2		11.9		6.5		5.3

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		2.6		3.6		5.2		6.8		7.7		7.7		6.6		5.7		4.6		3.7		2.9		2.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.1		10.6		13.4		16.2		18		20		21.9		23.5		23.2		21.6		17.2		10.4		9.8

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		10.8		13.9		16.1		18.1		22.3		27.3		31.3		28.8		24.9		18.4		10.3		10

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.4		6.1		9.3		13.3		17.4		21.8		25.2		26.5		23.3		18.2		11.9		6.5		5.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.5		2.7		3.8		5.4		7.1		8.5		8.4		7.8		7.2		5.6		4.3		3		2.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.4		13.7		17.6		19		21.6		24.6		23.8		26.1		25.7		25.4		19.6		14.6		13.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		25.2		15		20.2		20.3		24.7		32.9		32.5		38.3		34.5		31.9		21.9		16		14.3

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.7		4.7		7		10.8		14.4		16		23		23.4		19.2		15.4		8.8		5		4.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.2		2.4		3.1		4.8		6		6		6.8		5.2		4.7		3.5		3.4		2.6		2.1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.4		7.2		9.1		12.4		14.5		14.7		20		20.8		18.9		17.6		11.5		7.1		6.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		6.4		7.9		10.6		12.3		12		22.7		24.4		19.8		18.1		10.2		6		6.3