ST. MARKS, FLORIDA

Average Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		68.2		53.5		54.9		60.6		67.8		74.6		79.9		81.4		81.5		78.8		70.4		60.5		53.9

Average High Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		78.6		64		65.5		71.3		78.6		85.2		90.1		90.8		90.9		88.4		81.8		72.4		64.7

Average Low Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		57.7		43.1		44.2		50		56.9		63.9		69.9		72.1		72.1		69.1		59.1		48.6		43.1

Highest Recorded Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		108		82		85		88		93		102		108		104		102		100		95		86		81

Lowest Recorded Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		11		12		17		19		31		42		53		60		59		42		30		20		11

Average Number of Days Above 90F/32C

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		80.7		---		---		---		0.3		4.9		17.6		21		21.7		13.7		1.5		---		---

Average Number of Days Below 32F/0C

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		19		5.6		4.2		1.4		---		---		---		---		---		---		0.1		2		5.8

Average Precipitation

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		53.8		3.8		4		4.6		3.8		3.5		5.5		7.5		6		5.7		3		2.7		3.7

Average Number of Days With Precipitation

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		96		8		7		8		5		6		9		13		12		9		5		6		7

Most Precipitation Reported in a Day

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		8.4		6		6.1		7.5		8.4		4.2		7.2		7		6.7		7.7		4		4		4.5

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

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		68		5		5		6		4		5		6		10		9		7		4		4		5

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

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		33		2		3		3		2		2		3		4		4		3		2		2		2

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

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		1		1		1		1		1		2		2		2		2		1		1		1

Most Rain Reported in a Month

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		93.3		12.7		10.3		11.6		15.5		10.2		17.6		21.1		14.8		28.6		13.3		10.5		11.6

Least Rain Reported in a Month

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		32.8		---		0.3		---		---		---		0.6		2.3		1.8		0.1		---		---		0.2

Average Snowfall

Years on Record: 74

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

Most Snow Reported in a Month

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		3		---		3		---		---		---		---		---		---		---		---		---		---

Heating Degree Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1255.7		355		286.7		134.9		---		---		---		---		---		---		---		135		344.1

Cooling Degree Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2431.6		---		---		---		82.5		296.1		450		510		511.5		412.5		169		---		---

Growing Degree Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6654.8		110.1		137		330.2		532.5		761.1		900		975		976.5		862.5		634		315		120.9

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.9		11.6		12.4		13.3		14.1		14.5		14.3		13.6		12.7		11.8		11.1		10.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		2.9		3.7		4.7		5.8		6.2		5.7		5.6		5.2		4.7		4.2		3.3		2.8

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		1.1		1.4		1.7		2		2.3		2.5		2.4		2.2		1.9		1.4		1.1		1

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.9		3.9		4.6		5.2		5.7		5.7		5		5		5		4.9		5		4.4		3.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.8		4.1		4.5		5.1		5.8		5.8		4.6		4.6		4.5		4.5		5		4.8		4.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		2.9		3.7		4.7		5.8		6.2		5.7		5.6		5.2		4.7		4.2		3.3		2.8

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		1.2		1.5		1.8		2.1		2.4		2.5		2.5		2.3		2		1.6		1.2		1.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.7		4.9		5.7		6.2		6.7		6.1		5.9		5.5		5.6		5.6		6.2		5		4.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.2		5.7		6.3		6.7		7.9		6.7		6.5		5.6		5.6		5.7		7		5.8		5.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.8		2.1		2.8		3.9		5.1		5		5		4.8		4.5		3.8		3.3		2.4		2.3

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		0.9		1.1		1.5		1.6		2.1		2.3		2.3		2.1		1.7		1.2		1		0.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		2.6		3.3		4.1		5		4.6		4.5		4.4		4.3		3.9		3.8		2.9		3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		2.2		2.6		3.4		4.5		3.8		3.6		3.4		3.3		3		3.2		2.5		2.8