SULLIVANS ISLAND, SOUTH CAROLINA

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Elevation: 0 meters Latitude: 32 46N Longitude: 079 51W

WEATHER

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CURRENT CONDITIONS

Sunrise/Set

06:23 am

08:08 pm
Local Time
8:48 am EDT
10 May, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18.9		9.3		10.4		13.9		18.2		22.6		26		27.6		27.3		24.8		20.1		15.2		11

Average High Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23.6		14.3		15.6		19		23.3		27.3		30.3		31.7		31.4		29.1		25		20.4		16.2

Average Low Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.1		4.3		5.2		8.7		13.1		17.9		21.7		23.3		23.1		20.6		15.1		10		5.8

Highest Recorded Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40.6		25.6		27.2		32.2		33.9		37.2		40.6		38.3		39.4		37.2		34.4		31.7		28.9

Lowest Recorded Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-12.8		-12.8		-11.1		-7.2		-9.4		2.8		9.4		15		13.9		8.9		---		-5.6		-11.7

Average Number of Days Above 100F/38C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.9		---		---		---		---		---		0.2		0.5		0.3		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		38.7		---		---		---		0.1		1.7		7.4		13.5		12.4		3.3		0.2		---		---

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		157.2		---		---		0.5		4.8		21.4		28.6		31		30.5		26.2		12		1.9		0.2

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		240.9		2		3.2		10.7		23.1		30.5		29.9		31		31		30		27.9		16.6		5.2

Average Number of Days Above 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		314.8		14.2		15.6		25.5		29.4		31		30		31		31		30		30.9		27.4		18.9

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		354.8		26.1		26.2		30.4		30		31		30		31		31		30		31		29.8		28.3

Average Number of Days Above 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		364		30.5		27.9		31		30		31		30		31		31		30		31		30		30.6

Average Number of Days Below 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		270.5		31		28		31		29.7		24.9		9.7		3.2		6		16.9		29.1		29.9		31

Average Number of Days Below 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		198.2		31		27.9		30.3		22.4		8.3		1		---		0.2		2.9		17.2		26.5		30.4

Average Number of Days Below 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		133.2		28.3		25.5		21		8.7		1.3		---		---		---		0.2		5.7		16		26.3

Average Number of Days Below 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		65.1		18.8		14.8		8.8		1.2		---		---		---		---		---		0.5		5.4		15.7

Average Number of Days Below 32F/0C

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17.9		6.9		4.3		1.3		0.1		---		---		---		---		---		---		0.6		4.7

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2		1		0.2		0.1		---		---		---		---		---		---		---		---		0.7

PRECIPITATION

Average Precipitation

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1198		96		84		100		69		77		115		137		159		118		97		65		82

Average Number of Days With Precipitation

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		104		10		9		9		7		7		9		11		10		9		7		7		9

Most Precipitation Reported in a Day

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		249.7		104.1		153.4		101.6		118.1		165.1		132.6		153.7		126		119.4		249.7		192.3		99.1

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		69.7		6.7		5.7		5.8		4.7		4.3		6.3		7.6		7.5		5.8		5.3		4.5		5.5

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

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70		6		6		6		4		5		6		8		8		6		4		4		6

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

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		3		2		3		2		2		3		3		4		3		2		2		2

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		30.1		2.8		2		2.6		1.9		1.7		2.5		3.3		4		3		2.1		2.2		2

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

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13		1		1		1		1		1		2		1		2		2		1		1		1

PRECIPITATION - RAIN

Most Rain Reported in a Month

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1736		224		236		240		194		364		399		454		524		290		488		259		184

Least Rain Reported in a Month

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		791		16		11		13		---		2		22		32		4		11		2		2		19

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 59

		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: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		3.8		1.8		1.3		3.8		---		---		---		---		---		---		---		---		10.2

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2018		527		416		285		88		10		1		---		---		1		49		196		445

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2340		---		---		6		63		249		440		547		510		355		138		28		3

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6143		70		81		214		426		704		889		1012		975		804		555		296		117

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.7		11.5		12.4		13.5		14.3		14.8		14.5		13.7		12.8		11.8		10.9		10.5

SOLAR RADIATION

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.7		9.4		11.6		15.6		20.2		21.6		21.1		20.6		18.4		16.1		13.9		10.8		9.1

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		3.6		4.7		6		7		8.2		8.8		8.6		7.9		6.5		4.9		3.7		3.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.9		13.1		14.7		17.4		20.2		19.7		18.6		18.5		17.7		17		17.2		14.9		13.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.7		13.5		13.9		16.6		20.6		19.9		18.1		17.8		16.1		15.8		17.2		16		14.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.7		9.4		11.6		15.6		20.2		21.6		21.1		20.6		18.4		16.1		13.9		10.8		9.1

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.4		3.8		4.9		6.3		7.6		8.8		9.1		8.9		8.1		6.8		5.3		4		3.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		15.4		18.6		19.6		23.4		21.7		21.1		20.4		19.8		20.1		21.3		18		15.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.4		17		19.8		19.9		26.9		24		23.4		21.7		20.1		20.9		23.8		20.9		17.9

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		7.2		9.7		12		17.6		17.2		18.7		18.8		16		13.2		11.3		6.8		7.4

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		4.2		5.7		6		7.7		8.2		8.2		7.5		6		4		3.2		3

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.5		9.3		11.6		12.9		17.4		15.9		16.7		17		15.3		13.7		13.4		8.2		10.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.3		8.1		9.6		9.9		15.6		12.7		14.2		14.8		12.1		10.6		11.5		6.4		9.7

NEARBY - MAP

NEARBY - LIST

Charleston - Harbor, South Carolina (4 mi / 8 km)
Mount Pleasant, South Carolina (4 mi / 7 km)
Charleston, South Carolina (14 mi / 22 km)
North Charleston, South Carolina (14 mi / 22 km)
Lincolnville, South Carolina (24 mi / 38 km)

GEOBA.SE

Sullivans Island, South Carolina