LITTLE CREEK, DELAWARE

Average Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		---		2		6		11		17		22		25		23		20		14		8		3

Average High Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17		5		6		11		16		22		27		29		28		25		18		13		7

Average Low Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		-3		-2		1		6		12		17		20		19		15		9		3		-1

Highest Recorded Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		39		22		24		30		32		36		37		39		38		36		32		28		23

Lowest Recorded Temperature

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-20		-20		---		-12		-6		---		6		11		8		3		-4		-10		-20

Average Number of Days Above 80F/26C

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		86		---		1		2		6		17		25		22		11		2		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		86		24		20		12		2		---		---		---		---		---		1		8		19

Average Number of Days Below 10F/-12C

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3		1		1		---		---		---		---		---		---		---		---		---		1

Average Precipitation

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1080		70		70		90		80		90		80		100		110		90		70		80		90

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		2.2		1.2		1.1		1.3		1.7		2.3		3.2		3.7		3.6		2.9		2.1		1.6		1.3

Average Number of Rainy Days

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		113		11		9		11		10		11		9		9		9		8		7		9		10

Average Number of Days With Thunderstorms

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		34		1		1		1		3		5		5		7		6		2		1		1		1

Most Rain Reported in a Day

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		220		50		60		60		60		70		90		130		220		80		100		140		70

Most Rain Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1840		200		190		190		180		200		380		320		420		200		170		210		200

Least Rain Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		570		---		20		20		---		10		10		10		20		10		---		---		10

Average Snowfall

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		43		13		15		5		---		---		---		---		---		---		---		1		5

Average Number of Days With Snow

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		4		3		1		1		---		---		---		---		---		---		1		1

Deepest Snow Cover Reported

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		66		45		66		30		2		---		---		---		---		---		---		12		30

Most Snow Reported in a Day

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		163		45		20		5		---		---		---		---		---		---		22		23		45

Most Snow Reported in a Month

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		136		54		86		51		5		---		---		---		---		---		---		22		34

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72		69.8		67		67.4		68.8		72.1		74.5		73.2		76.1		76.8		75.2		72.1		71

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		75		69		70		70		72		76		76		79		82		82		80		76		69

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		57		57		56		52		56		58		56		58		61		59		57		57		56

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7		-5		-3		---		4		11		15		18		18		14		8		3		-2

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10		-1		---		3		8		13		18		21		20		16		11		6		1

Heating Degree Days

Years on Record: 49

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2519.4		535		450		364.4		194.4		65		5.6		---		0.6		21.1		134.4		285.6		463.3

Cooling Degree Days

Years on Record: 49

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		674.4		---		---		1.1		7.2		41.1		132.2		207.8		183.9		87.2		12.8		1.1		---

Growing Degree Days

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1990.7		---		---		---		50		223.9		366.7		465		430.6		316.7		137.8		---		---

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		11.2		12.4		13.7		14.9		15.4		15.1		14.1		12.9		11.6		10.5		10

Average Number of Days With Fog

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		183		13		12		13		13		16		16		18		21		18		16		14		13

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		54		58		60		55		57		57		51		53		49		47		46		53		57

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		57.5		61.2		56.6		59.9		59.4		59.4		59.6		57.1		55.9		54.4		50.2		58.5		58.3

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		51.4		55.9		50.3		55.3		52.5		54.2		50.1		49.3		48.1		48.8		45.7		53.4		53.3

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.1		7.3		10.3		13.6		17		19.1		21		19.9		18.3		15.8		12.1		8.2		6.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		3		3.9		5.5		7.2		8.3		8.8		8.6		7.5		5.9		4.3		3.2		2.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		11.7		13.9		15.9		17.2		17.5		18.4		17.8		17.8		17.5		16.2		12.6		11

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		12		14.4		15.2		16.2		16.7		18.5		17.3		17.2		17.5		16.4		13.1		11.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.1		7.3		10.3		13.6		17		19.1		21		19.9		18.3		15.8		12.1		8.2		6.5

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		4.1		5.7		7.4		8.6		9.1		8.8		7.7		6.2		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		18.2		13.7		17.3		18.7		19.7		20.4		20.2		19.6		20.3		20.1		20.2		15.6		13.4

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.9		14.9		19.5		19.5		20.5		22.4		22.5		21.1		22		21.7		22.6		17.4		14.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.7		6.3		8.1		12.1		14.4		12.2		18		17.8		16.2		13.2		10		6.7		4.9

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		2.8		3.5		5.2		6.8		7.8		8.4		8.2		7		5.4		3.6		2.8		2.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.5		9.5		10.2		13.8		14.3		11.2		15.8		16		15.6		14.3		12.6		9.5		7.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.7		9		9		12		11.5		6.5		13.5		13.8		13.4		12.4		11.3		8.8		6.5