DELAWARE, IOWA

Average Temperature

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		-8.1		-6.6		0.2		8.2		14.7		19.9		22.4		21.3		16.7		10.7		2.1		-5.4

Average High Temperature

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.8		-2.9		-1.3		5.4		14.4		21.1		26.2		28.9		27.7		23.1		17.1		7.3		-0.7

Average Low Temperature

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2.2		-13.4		-11.9		-5		1.9		8.3		13.7		15.9		14.8		10.2		4.3		-3.2		-10.1

Highest Recorded Temperature

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		43.9		15		19.4		27.2		32.8		41.7		41.1		43.9		41.1		37.8		32.8		25.6		17.2

Lowest Recorded Temperature

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-35.6		-34.4		-35		-35.6		-16.1		-5.6		1.7		4.4		1.7		-8.9		-11.7		-23.3		-33.3

Average Number of Days Above 90F/32C

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15.9		---		---		---		---		0.4		3.2		6.3		4.5		1.4		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		158.8		30.5		27.7		25.9		12.5		1.7		---		---		---		0.7		7.9		22.1		29.7

Average Number of Days Below 0F/-17C

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24.4		10		7.4		1.1		---		---		---		---		---		---		---		0.4		5.4

Average Precipitation

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		955		31		38		62		100		119		131		102		112		87		61		58		53

Average Number of Days With Precipitation

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		92		6		5		7		9		11		10		8		8		9		7		6		6

Most Reported Precipitation in a Month

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		343		118		90		132		167		243		343		267		253		324		220		147		73

Least Reported Precipitation in a Month

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		2		5		9		24		32		3		2		17		---		2		7

Most Precipitation Reported in a Day

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		161		63.8		29.5		81.5		72.6		111		129.8		161		108.7		158.5		82.3		60.5		43.9

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

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64		3		3		5		6		8		8		6		6		6		5		4		4

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

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22		---		---		1		2		3		3		3		3		3		2		1		1

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

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		---		---		---		1		1		1		1		1		1		---		---		---

Average Snowfall

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		70.9		16.3		14.7		14.5		2.8		0.2		---		---		---		---		0.2		5.8		16.3

Most Snow Reported in a Month

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		86.6		46.7		86.6		80		45.7		6.3		---		---		---		3.8		6.3		34.5		43.2

Heating Degree Days

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2792.2		647.8		546.7		391.7		157.8		37.2		2.2		---		0.6		16.7		105.6		323.9		562.2

Cooling Degree Days

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		381.1		---		---		---		2.2		21.1		78.9		133.3		103.9		36.7		5		---		---

Growing Degree Days

Years on Record: 83

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1400.8		---		---		---		---		146.4		298.3		385.8		349.6		200		20.7		---		---

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		11.1		12.5		13.9		15.2		15.8		15.5		14.3		12.9		11.5		10.3		9.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.7		6.6		9.6		12.7		16.4		19.6		21.7		21.5		18.6		15.2		10.6		6.6		5.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		2.6		3.6		5.2		6.9		8.1		8.6		8.2		7.2		5.5		4.1		2.8		2.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		12.1		14.3		15.4		16.8		17.9		18.9		19.1		18.2		17.4		14.7		10.7		10.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.8		12.2		14.6		14.8		16.1		18.1		20.4		20.9		18.7		17.9		14.6		10.7		10.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.7		6.6		9.6		12.7		16.4		19.6		21.7		21.5		18.6		15.2		10.6		6.6		5.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		2.6		3.8		5.4		7.1		8.5		9.1		8.8		7.6		6		4.3		3		2.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.1		14.3		18.5		21.2		19.9		22.5		22.4		21.4		21		22.5		17.5		15.5		12.9

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		15.1		20.4		24		21.6		27.9		28.7		26		24.2		26.6		18.7		17.3		13.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.9		5.8		7.5		10.2		13.1		14.9		18.4		16.7		16.6		10.9		7.9		4.4		4.5

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.8		2.4		3.1		4.2		6.4		7		7.5		7.6		6.5		4.4		3.7		2.5		2.1

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		9.8		10.4		11.6		13.1		13.6		16.1		14.9		16.1		11.7		9.9		6		7.7

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		9.5		9		9.4		10.2		10.3		14.6		12.5		14.9		9.1		8.2		4.8		7.1