ANN ARBOR, MICHIGAN

Average Temperature

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		48.8		24.1		25.3		35.1		47.5		58.6		68.2		72.6		70.7		63.7		52.1		39.5		28.2

Average High Temperature

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		58.1		31.1		33.1		44.1		58		69.6		79.1		83.4		81.3		74.2		61.9		47		34.7

Average Low Temperature

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		39.5		17		17.6		26.2		37		47.6		57.3		61.8		60.1		53.2		42.4		32		21.8

Highest Recorded Temperature

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		105		72		67		83		88		95		103		105		104		99		91		78		67

Lowest Recorded Temperature

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-22		-22		-21		-8		7		20		35		41		39		27		19		1		-20

Average Number of Days Above 90F/32C

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12.1		---		---		---		---		0.3		2.5		5.2		3		1.2		---		---		---

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70.7		---		---		---		0.8		3.8		14.9		22.8		18.8		8.1		1.6		---		---

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		135.2		---		---		0.4		4.9		14.8		26.6		30.6		29.5		22.1		5.8		0.5		---

Average Number of Days Above 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		186.8		0.1		---		3.7		14.7		27.1		29.6		31		31		29		16.3		4.1		0.1

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		228.7		1.1		1		9.7		22.8		30.5		30		31		31		30		27.5		12.6		1.5

Average Number of Days Above 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		277.8		6.2		7		20.6		28.7		31		30		31		31		30		31		22.7		8.6

Average Number of Days Below 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		363.5		31		28		31		30		31		29.8		30.3		30.5		30		31		30		31

Average Number of Days Below 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		327.1		31		28		31		29.9		30.2		20.5		17.5		20		27.5		30.5		30		31

Average Number of Days Below 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		255.4		31		28		30.9		28.5		22.5		6.9		1.5		2.9		14.3		28.3		29.7		31

Average Number of Days Below 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		194.3		30.6		27.9		29.3		22.4		6		0.5		---		---		2.6		18.3		26.2		30.6

Average Number of Days Below 32F/0C

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		137.4		28.9		26.2		23.8		9.8		0.9		---		---		---		0.1		3.8		16.6		27.2

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62.2		19.7		16.7		9.4		0.5		---		---		---		---		---		---		3.6		12.3

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		21		9		6.7		2		---		---		---		---		---		---		---		---		3.3

Average Number of Days Below 0F/-17C

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.7		2.6		2.1		0.2		---		---		---		---		---		---		---		---		0.9

Average Precipitation

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		32.2		2		1.9		2.4		2.9		3.3		3.4		3		2.9		2.9		2.4		2.5		2.3

Average Number of Days With Precipitation

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		130		13		11		12		12		12		10		9		9		9		10		11		12

Most Reported Precipitation in a Month

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		10.8		5		6.8		5.1		6.7		10.5		8.4		10.8		8.7		7		8.3		5.9		4.9

Least Reported Precipitation in a Month

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		0.2		0.2		0.3		0.2		0.5		0.2		0.1		---		0.3		0.1		0.1		0.3

Most Precipitation Reported in a Day

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		4.5		1.6		2.3		2.4		2.4		2.6		3.3		2.8		4.5		3.9		2.8		2.3		2.1

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

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		73		6		5		6		7		7		7		6		6		6		5		6		6

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

Years on Record: 120

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

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

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5		---		---		---		---		1		1		1		1		1		---		---		---

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		122.2		11.4		9.7		10.7		11.4		11.1		10		8.7		8.6		9		9.4		10.5		11.3

Most Rain Reported in a Day

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		3.9		1.7		2.5		2.3		3.7		3		3.3		2.9		3.7		3.9		2.9		2.3		2.2

Most Rain Reported in a Month

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		47.2		4.7		6.8		4.8		6.7		10.5		8.5		10.7		8.7		7		7.4		5.9		4.9

Least Rain Reported in a Month

Years on Record: 117

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		16.9		0.2		0.2		0.3		0.2		0.5		0.2		0.1		---		0.3		0.1		0.1		0.3

Average Snowfall

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		41.3		10.9		9.4		6.3		1.9		---		---		---		---		---		0.1		3.6		9.1

Most Snow Reported in a Month

Years on Record: 120

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		58.5		36		58.5		21.5		12		2		---		---		---		---		2.8		57.5		40.5

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6684		1282		1090		927		545		251		55		8		18		124		464		774		1145

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		561		---		---		---		2		24		127		200		156		46		7		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2609		---		---		6		68		256		522		657		603		377		107		12		1

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		15.4		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
kWh/m2		3.7		1.6		2.4		3.4		4.5		5.3		6		5.9		5		4.2		2.8		1.7		1.3

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.7		1		1.5		1.9		2.3		2.4		2.3		2		1.5		1.2		0.8		0.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.1		2.8		3.4		4		4.6		4.8		5.2		5.3		4.9		4.8		3.9		2.6		2.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4		2.7		3.2		3.8		4.3		4.7		5.5		5.7		4.9		4.9		3.8		2.5		2.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		1.6		2.4		3.4		4.5		5.3		6		5.9		5		4.2		2.8		1.7		1.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.7		1.1		1.5		2		2.4		2.5		2.4		2.1		1.7		1.2		0.8		0.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.8		3.6		4.3		5.2		5		5.7		5.9		5.8		5.4		6		4.5		3.5		3.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.3		3.8		4.6		5.6		5		6.5		7.2		6.9		5.9		6.9		4.6		3.8		3.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3		1.4		2.1		2.8		3.6		4.4		5.2		4.6		4.3		3.2		2.4		1.2		1

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		0.7		1		1.3		1.9		2.1		2.2		2.2		1.9		1.3		1.1		0.8		0.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		2.3		2.8		3.2		3.5		4.1		4.5		4.1		4.2		3.4		3.1		1.6		1.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.7		2		2.5		2.6		2.7		3.3		4.1		3.4		3.6		2.8		2.7		1.3		1.4