ALDEN, IOWA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7.9		-9.6		-5.7		0.8		8.5		15.5		20.7		22.6		21.4		16.8		10.1		0.3		-7.2

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.3		-5.1		-1.2		5.8		14.7		21.7		26.8		28.3		27.1		23.2		16.2		4.7		-3.1

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2.4		-14.1		-10.2		-4.2		2.3		9.2		14.6		16.8		15.8		10.5		3.9		-4		-11.3

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		31.6		2.9		6.9		11.3		20		26.4		31.1		31.6		31.2		27.1		19.7		13		2.6

Lowest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-21.6		-21.6		-18.5		-9.2		-0.8		5.1		11.9		14.4		13.3		7.6		0.2		-8.3		-19.8

Average Precipitation

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		840		17		18		44		82		110		136		123		102		84		58		42		25

Average Number of Days With Precipitation

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		90		6		5		7		9		11		10		8		8		7		7		6		6

Most Reported Precipitation in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		309		47		54		105		177		267		274		286		309		206		149		100		100

Least Reported Precipitation in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		1		1		6		19		39		43		27		8		24		5		---		2

Most Precipitation Reported in a Day

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		186.4		20.3		36.1		47.8		91.7		87.6		104.1		186.4		83.3		118.1		62.2		58.4		38.1

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		61.2		2.3		2.4		4		6.7		8.1		7.9		6.6		6.2		5.3		4.8		3.6		3.3

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

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		61		3		2		4		7		8		8		6		6		5		5		4		3

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

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		21		---		---		1		2		3		4		3		3		2		2		1		---

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		21.3		0.1		0.2		1		2.3		2.8		3.8		3		2.9		2.1		1.6		1		0.5

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

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9		---		---		---		1		1		2		2		1		1		1		---		---

Average Snowfall

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		77.7		18.8		15.8		10.9		5.6		---		---		---		---		---		1		7.6		18

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		18.1		4.3		3.5		2.3		1.2		---		---		---		---		---		0.3		1.9		4.6

Most Snow Reported in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		60.5		53.3		47		31.8		25.4		1.3		---		---		---		---		6.3		31.2		60.5

Avg. No. of Days w/Snow Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12.6		2.8		2.3		1.6		1.1		---		---		---		---		---		0.2		1.4		3.2

Avg. No. of Days w/Snow Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.4		0.8		0.6		0.5		0.2		---		---		---		---		---		---		0.3		1

Avg. No. of Days w/Snow Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.1		0.2		0.2		0.3		---		---		---		---		---		---		---		0.1		0.3

Avg. # of Days w/Snow Depth Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64.8		19.5		16.8		6.7		1.3		---		---		---		---		---		0.1		3.7		16.7

Avg. # of Days w/Snow Depth Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40		13.6		11		3.9		0.4		---		---		---		---		---		---		1.4		9.7

Avg. # of Days w/Snow Depth Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24.6		10.5		6.5		2.1		---		---		---		---		---		---		---		0.5		5

Avg. # of Days w/Snow Depth Above 10in/25cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.6		2.9		2.3		---		---		---		---		---		---		---		---		0.1		1.3

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4203.9		865		671.7		542.8		297.2		121.7		18.9		6.1		15.6		76.7		257.2		539.4		791.7

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		404.4		---		---		---		2.8		32.2		88.9		137.8		110.6		31.7		0.6		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1442.9		---		---		---		---		170.5		320		390.9		354.8		205		1.7		---		---

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		9.6

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.4		6.2		9		12.1		16.1		19.4		21.5		21.5		18.4		14.8		10.3		6.4		5.2

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		2.4		3.5		5.2		6.9		8.1		8.7		8.2		7.2		5.5		3.9		2.7		2.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.3		11.7		13.7		14.9		16.6		17.8		18.7		19.1		18.1		17		14.7		10.8		10.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		11.8		13.7		14		15.9		18		20.2		21.1		18.8		17.4		14.8		10.9		10.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.4		6.2		9		12.1		16.1		19.4		21.5		21.5		18.4		14.8		10.3		6.4		5.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		2.5		3.6		5.3		7.1		8.4		9		8.7		7.6		5.9		4.1		2.8		2.2

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.7		15		16.2		19.6		20.7		21.8		21.7		21.2		20.9		21.3		18.4		14.5		13.3

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		16.1		17		21.5		23.2		26.4		27.2		25.9		24.2		24.6		20.2		16		14.3

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.7		4.9		6.2		9.8		12.7		14.8		19		17.1		15.8		11.6		7.3		5		4.2

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		2.2		3.3		4.5		6.2		7.2		7.8		7.6		6.5		4.7		3.5		2.5		2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.5		8.4		8.4		11.2		12.7		13.5		16.6		15.3		15.3		12.6		9.2		7.5		7.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.8		7.6		6.6		9.1		9.8		10.3		15.8		13.3		13.6		10.7		7.5		6.5		6.7