ST. MARKS, FLORIDA

Average Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		20.1		11.9		12.7		15.9		19.9		23.7		26.6		27.4		27.5		26		21.3		15.8		12.2

Average High Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		25.9		17.8		18.6		21.8		25.9		29.6		32.3		32.7		32.7		31.3		27.7		22.4		18.2

Average Low Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.3		6.2		6.8		10		13.8		17.7		21.1		22.3		22.3		20.6		15.1		9.2		6.2

Highest Recorded Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42.2		27.8		29.4		31.1		33.9		38.9		42.2		40		38.9		37.8		35		30		27.2

Lowest Recorded Temperature

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-11.7		-11.1		-8.3		-7.2		-0.6		5.6		11.7		15.6		15		5.6		-1.1		-6.7		-11.7

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
mm		1366		98		100		117		97		89		138		191		152		145		75		68		95

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
mm.		212.3		152.4		154.9		190.5		212.3		106.7		183.1		177.8		170.4		195.8		102.4		101.6		114.3

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
mm		2369		322		263		295		393		259		448		537		375		725		339		267		294

Least Rain Reported in a Month

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		834		---		7		---		---		---		16		59		46		2		---		---		5

Average Snowfall

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		0.2		---		0.2		---		---		---		---		---		---		---		---		---		---

Most Snow Reported in a Month

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		7.6		---		7.6		---		---		---		---		---		---		---		---		---		---

Heating Degree Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		850.5		197.2		159.3		74.9		---		---		---		---		---		---		---		75		191.2

Cooling Degree Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1350.9		---		---		---		45.8		164.5		250		283.3		284.2		229.2		93.9		---		---

Growing Degree Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3750.8		61.2		76.1		183.4		295.8		422.8		500		541.7		542.5		479.2		352.2		175		67.2

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		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
Mj/m2		16.4		10.6		13.2		17		20.8		22.3		20.3		20.1		18.8		16.9		14.9		12		10.2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.3		3.9		4.9		6.1		7.1		8.1		8.9		8.7		8		6.7		5.1		4		3.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.5		14.1		16.4		18.8		20.5		20.4		18.1		18.1		18		17.6		17.9		15.8		14.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.2		14.8		16		18.3		20.8		20.8		16.6		16.6		16.2		16.2		18		17.1		15.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.4		10.6		13.2		17		20.8		22.3		20.3		20.1		18.8		16.9		14.9		12		10.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.6		4.2		5.2		6.6		7.7		8.8		9.1		8.9		8.2		7		5.6		4.4		3.8

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		17.8		20.7		22.2		24.2		21.9		21.3		19.8		20.2		20.1		22.3		18		16.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.5		20.7		22.8		24.1		28.3		24		23.5		20.1		20.2		20.4		25.1		20.8		19.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.5		7.7		10.2		13.9		18.3		18.1		18.1		17.2		16.1		13.7		12		8.7		8.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		3.4		4.1		5.3		5.9		7.7		8.1		8.4		7.5		6.3		4.1		3.6		3.2

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		9.3		11.8		14.9		17.9		16.7		16.2		15.7		15.4		14		13.7		10.4		10.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.5		7.8		9.5		12.2		16.2		13.6		13		12.1		11.8		10.7		11.6		9		10.2