PORTSMOUTH, OHIO

Average Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		0.8		1.8		7.1		12.8		18.1		22.6		24.6		23.8		20.3		13.8		7.6		2.2

Average High Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		19.2		5.8		7.2		13.2		19.6		24.9		29.2		31		30.2		27.2		20.8		13.5		7.1

Average Low Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.8		-4.2		-3.6		1		6.1		11.3		16.1		18.2		17.4		13.5		6.9		1.7		-2.6

Highest Recorded Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		41.7		26.1		26.1		35.6		37.2		37.2		39.4		41.7		40.6		39.4		36.7		29.4		24.4

Lowest Recorded Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-33.9		-33.9		-27.8		-17.8		-11.1		-2.2		3.3		4.4		1.7		-2.2		-7.8		-16.7		-27.8

Average Number of Days Above 90F/32C

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		37.6		---		---		0.1		0.4		2.3		7.7		12.3		9.8		4.6		0.4		---		---

Average Number of Days Below 32F/0C

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		101.3		23.8		21		14.7		3.9		0.2		---		---		---		0.1		2.9		13.1		21.7

Average Number of Days Below 0F/-17C

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.9		1		0.5		---		---		---		---		---		---		---		---		---		0.4

Average Precipitation

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1048		88		75		103		90		105		96		112		95		70		62		72		81

Average Number of Days With Precipitation

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		123		11		10		12		12		11		11		10		9		8		8		10		11

Most Reported Precipitation in a Month

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		324		324		217		270		209		271		228		305		194		257		184		189		251

Least Reported Precipitation in a Month

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		16		4		10		11		7		14		18		14		6		---		9		14

Most Precipitation Reported in a Day

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		162.6		64		86.4		95		112.3		78.7		78		127.5		97.3		162.6		89.7		76.2		83.8

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

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		81		7		6		8		8		8		7		8		6		5		5		6		7

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

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29		2		2		3		2		3		3		3		3		2		2		2		2

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

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		1		1		1		1		1		1		1		1		1		---		1		1

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		121.8		11.4		10.4		11.9		11.4		11.3		10.4		10.2		9.1		7.7		7.9		9.5		10.6

Most Rain Reported in a Day

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		160		60		80		70		110		60		70		120		90		160		80		70		80

Most Rain Reported in a Month

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1410		320		220		210		200		230		220		300		190		250		180		180		250

Least Rain Reported in a Month

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		570		10		---		10		10		---		10		10		10		---		---		---		10

Average Snowfall

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		34.5		11.7		9.7		5.3		0.5		---		---		---		---		---		---		1.5		5.8

Most Snow Reported in a Month

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		66.8		66.8		56.6		50.8		16.5		---		---		---		---		---		2.5		15.2		33.5

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2851.1		606.1		489.4		375.6		194.4		78.9		8.9		---		5		36.7		188.9		348.3		518.9

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		538.9		---		---		---		1.7		43.9		108.9		171.1		146.7		58.9		7.8		---		---

Growing Degree Days

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2025.2		---		---		---		85		251.4		378.3		452.9		428.8		310		118.8		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.3		11.3		12.4		13.7		14.8		15.4		15.1		14.1		12.8		11.6		10.5		10

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		6.5		9.1		12.4		16.5		18		21		20.7		18.4		15.8		11.7		7.2		5.7

Average 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		3		4.1		5.7		7.2		8.5		8.8		8.5		7.5		5.9		4.3		3.2		2.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		10.1		12		14.3		16.7		16.5		18.4		18.5		17.8		17.6		15.7		10.7		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		14.3		9.7		11.4		12.8		15.4		14.8		18.5		18.8		17.4		17.6		15.7		10.5		8.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		6.5		9.1		12.4		16.5		18		21		20.7		18.4		15.8		11.7		7.2		5.7

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.9		3		4.2		5.7		7.4		8.6		9.1		8.8		7.7		6.3		4.6		3.3		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		17.7		12.3		14.7		18.9		19.5		19.7		20.8		20.4		20.1		20.2		18.9		15.2		11.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.1		12.7		15.4		19.9		20.2		20.8		24.1		22.9		21.6		22		20.5		16.8		12.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.2		5.5		7.4		9.9		13.6		14.8		18.4		17.8		16.7		13.2		8.5		4.4		4.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		2.9		3.9		5.1		6.8		8		8.2		8		7.1		5.4		3.9		2.9		2.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.7		8		9.1		10.9		13.5		13.5		16.2		15.9		16.2		14.2		10.2		5.4		6.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.6		7		7.5		8.1		10.3		9.8		14.1		13.8		14.4		12.3		8.2		3.8		5.9