MOUNT CLEMENS, MICHIGAN

Average Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		-4		-3		1		7		13		19		22		21		17		11		4		-1

Average High Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		-1		---		5		12		19		25		27		26		22		16		8		1

Average Low Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		4		-7		-7		-2		2		8		13		16		16		11		6		---		-5

Highest Recorded Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40		17		17		27		32		33		40		38		37		37		31		26		18

Lowest Recorded Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-27		-27		-23		-18		-10		-4		1		4		4		-1		-8		-15		-20

Average Number of Days Above 80F/26C

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		60		---		---		1		4		12		20		16		6		1		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		132		29		26		23		9		1		---		---		---		---		3		15		26

Average Number of Days Below 0F/-17C

Years on Record: 59

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

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		848.4		45.7		48.3		58.4		78.7		78.7		83.8		81.3		86.4		91.4		68.6		73.7		55.9

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		1.7		0.8		0.8		1		1.4		1.9		2.7		3		3		2.4		1.7		1.3		0.9

Average Number of Rainy Days

Years on Record: 57

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		127		12		11		12		12		11		10		9		9		9		9		11		12

Average Number of Days With Thunderstorms

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		37		1		1		1		3		4		7		7		6		4		1		1		1

Most Rain Reported in a Day

Years on Record: 57

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		100		30		60		40		40		80		80		100		80		70		60		40		50

Most Rain Reported in a Month

Years on Record: 57

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1110		100		120		120		130		180		200		230		180		180		110		140		110

Least Rain Reported in a Month

Years on Record: 57

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		400		---		---		10		10		10		---		10		---		---		---		10		---

Average Snowfall

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		86		22		19		13		3		---		---		---		---		---		---		6		19

Average Number of Days With Snow

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		33		9		8		5		1		---		---		---		---		---		---		2		8

Deepest Snow Cover Reported

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		48		43		48		22		15		---		---		---		---		---		---		10		38

Most Snow Reported in a Day

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		133		23		25		16		2		---		---		---		---		2		15		22		25

Most Snow Reported in a Month

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		144		69		55		52		22		2		---		---		---		---		4		28		54

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		73.4		79.1		75.6		71.6		66		70.4		70.9		70.3		74.1		74.1		74		75.3		78.2

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		79		79		79		78		74		74		74		79		84		85		81		77		79

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		60		67		64		59		54		53		53		57		58		62		60		64		69

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-7		-7		-3		1		7		12		16		15		11		5		---		-5

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6		-4		-5		---		5		11		15		18		17		13		7		2		-2

Heating Degree Days

Years on Record: 57

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3684.4		711.7		616.1		518.3		307.8		143.9		35		5		11.7		75.6		237.2		402.8		619.4

Cooling Degree Days

Years on Record: 57

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		347.2		---		---		---		1.7		18.3		66.7		123.9		97.2		36.7		2.8		---		---

Growing Degree Days

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1378.3		---		---		---		---		120.6		283.3		378.9		344.4		216.7		34.4		---		---

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 Number of Days With Fog

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		147		12		11		13		11		11		11		10		14		14		14		13		13

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		64		74		69		64		67		59		56		54		52		57		61		77		76

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		67.5		78		73.3		69.7		68.3		66.3		62.8		58.6		58.9		55.9		64		75.2		79

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		61.7		74.2		67.6		64.2		62.9		60		55.4		50.6		51.6		49.2		57.9		70.6		75.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		5.5		8.2		12.1		16.2		19.4		21.6		21.8		18.8		14.8		9.7		5.8		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		2.5		3.6		5.2		6.9		8.2		8.6		8.1		7.1		5.5		4.1		2.8		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		14.6		9.8		12		14.7		16.7		17.8		18.8		19.4		18.5		17		13.3		9.1		8.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		9.3		11.4		13.8		16		18		20.4		21.6		19.5		17.4		12.8		8.7		8.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		5.5		8.2		12.1		16.2		19.4		21.6		21.8		18.8		14.8		9.7		5.8		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		5.6		2.5		3.7		5.3		7.1		8.5		9		8.7		7.5		5.9		4.2		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		17.4		13		15.2		17.6		18.9		20.4		21.6		21.2		21		22.4		15.4		11.2		10.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.4		13.4		15.7		18.4		20		23.3		26.8		25.7		24.4		26.6		15.8		11.4		11.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.8		4.6		5.8		10.4		14.2		15.7		17.9		17.4		16.3		11.3		8.3		4.1		3.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5		2.4		3.4		4.9		6.6		7.6		7.8		7.6		6.5		4.3		3.9		2.6		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		11.5		7.6		7.7		12.1		14.4		14.3		15.7		15.5		15.9		12.2		10.9		5.7		5.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.9		6.7		5.8		10.3		12.3		11.6		13.9		13.8		14.7		10.1		9.5		4.5		5.2