YORKTOWN, IOWA

Average Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.6		-5.1		-2.2		3.1		10.9		16.7		21.5		24.2		23.2		18.6		13.5		4.2		-2.2

Average High Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16.8		0.4		3.6		9.2		17.7		23.2		27.7		30.6		29.6		25.4		20.5		10.3		3.2

Average Low Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		4.3		-10.6		-7.9		-2.9		4.2		10.3		15.5		17.8		16.8		11.8		6.4		-1.8		-7.6

Highest Recorded Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40.6		18.3		22.2		30.6		32.8		36.1		39.4		40.6		38.3		38.9		33.9		26.1		22.8

Lowest Recorded Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-30.6		-30.6		-29.4		-28.3		-9.4		-2.8		2.8		8.9		4.4		-3.3		-9.4		-23.9		-27.2

Average Number of Days Above 90F/32C

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28.2		---		---		---		0.1		0.9		4.2		11.1		8.4		3.2		0.4		---		---

Average Number of Days Below 32F/0C

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		138.5		29.5		26.1		22.3		7.4		0.6		---		---		---		0.3		4.4		19.4		28.4

Average Number of Days Below 0F/-17C

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		6.2		2.7		0.3		---		---		---		---		---		---		---		0.2		2.5

Average Precipitation

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		800		20		23		47		71		100		145		99		107		82		54		32		20

Average Number of Days With Precipitation

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		82		5		5		7		9		10		10		7		9		7		5		4		4

Most Reported Precipitation in a Month

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		490		100		65		175		170		204		282		490		230		258		250		104		52

Least Reported Precipitation in a Month

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		1		3		19		31		37		5		27		10		---		---		1

Most Precipitation Reported in a Day

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		121.4		26.9		40.9		41.4		54.6		97.8		92		121.4		75.2		111		98.3		80.5		33.8

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

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		54		2		2		4		6		7		8		5		7		5		4		2		2

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

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		20		---		---		1		2		3		4		3		3		2		1		1		---

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

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		---		---		---		---		1		2		1		1		1		---		---		---

Average Snowfall

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		50.8		11.2		12.4		11.2		1.8		---		---		---		---		---		0.2		3.6		10.4

Most Snow Reported in a Month

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		52.3		34.3		52.3		47		12.7		---		---		---		---		---		7.6		20.3		52.1

Heating Degree Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2184.4		552.2		421.1		305.6		97.8		17.2		0.6		---		---		7.8		56.1		261.1		465

Cooling Degree Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		561.1		---		---		0.6		5.6		36.7		108.9		181.7		153.3		60.6		13.9		---		---

Growing Degree Days

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1794.3		---		---		---		28.3		208.4		345		439.2		408.2		256.7		108.5		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.2		11.2		12.5		13.8		15		15.6		15.3		14.2		12.9		11.5		10.4		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