ATLANTIC, IOWA

Average Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9		-5		-3		2		9		16		21		24		23		18		12		3		-3

Average High Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16		---		2		7		17		23		28		31		30		26		20		9		2

Average Low Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-11		-9		-3		2		9		15		17		16		11		5		-3		-8

Highest Recorded Temperature

Years on Record: 28

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		47		18		20		30		31		40		41		47		43		39		33		25		20

Lowest Recorded Temperature

Years on Record: 28

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-36		-33		-36		-35		-14		-4		1		5		---		-5		-11		-26		-30

Average Number of Days Above 90F/32C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25		---		---		---		---		---		4		10		8		3		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		158		30		24		26		13		2		---		---		---		1		10		23		29

Average Number of Days Below 0F/-17C

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25		11		6		2		---		---		---		---		---		---		---		---		5

Average Precipitation

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		780		20		20		40		60		90		120		80		100		80		60		30		20

Average Number of Rainy Days

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		58		2		2		4		5		6		7		6		6		5		4		3		2

Average Snowfall

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		86		16		19		29		5		---		---		---		---		---		---		3		12

Average Relative Humidity

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		74		75		76		74		64		73		75		77		79		75		71		71		73

Average Dew Point

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2		-12		-9		-5		-3		6		11		17		16		11		5		-2		-8

Heating Degree Days

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4004.6		749.2		619.9		508.1		250		60.3		---		---		---		---		180.8		458.3		654.4

Cooling Degree Days

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		452.7		---		---		---		---		---		100		189.4		155		8.3		---		---		---

Growing Degree Days

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1745		---		---		---		---		198.1		350		447.8		413.3		258.3		77.5		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.1		11.1		12.5		13.9		15.1		15.7		15.4		14.3		12.9		11.5		10.3		9.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		6.8		9.4		13.2		16.4		19.6		22.2		22.2		19.4		16.3		11.4		7.4		6

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		2.7		3.7		5.3		7		8.2		8.6		8.1		7.1		5.5		4		2.9		2.4

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		12.1		13.4		15.9		16.8		18		19.3		19.7		18.9		18.6		15.9		12		11.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.4		12.2		13.2		15.4		15.9		18		21		22		19.9		19.7		16.3		12.5		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		14.2		6.8		9.4		13.2		16.4		19.6		22.2		22.2		19.4		16.3		11.4		7.4		6

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.8		3.9		5.5		7.2		8.5		9.1		8.8		7.7		6.1		4.4		3.1		2.5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		14.6		16.6		19.9		20.1		21.2		22.5		21.9		21.2		21.6		20.8		17		14.5

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.1		15.5		17.7		21.7		21.7		24.4		28.7		26.9		24.2		24.8		23.6		19.5		16

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		5.9		6.7		9.7		13.1		14		18.4		16.6		15.5		12.3		8.5		4.9		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		4.9		2.5		3.4		4.7		6.5		7.5		7.5		7.4		6.6		4.8		3.3		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		8.3		10.8		13.1		12.8		16.1		14.9		15		13.4		10.7		6.8		8.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.7		9.1		6.8		8.3		10.1		8.9		14.4		12.2		12.7		11.4		9.1		5.6		7.8