DORCHESTER, ONTARIO

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1083		84		65		79		89		88		95		101		88		110		89		98		99

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		186.5		21.5		17.1		16.8		16.2		13.6		11.8		12.6		12.2		13.4		14.6		17.3		19.2

Most Precipitation Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		94.5		42.8		42.7		32.7		79.8		69		91.4		79.4		72.8		94.5		78.7		51.4		34.4

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		65.4		5.2		3.9		5.4		6.1		5.8		5.5		5.3		5		5.6		5.3		5.8		6.5

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		34.3		2		1.6		2.5		2.6		2.7		3.7		3.3		3.2		3.8		2.8		3.2		3

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.5		0.2		0.2		0.3		0.4		0.6		0.7		1		0.6		1.1		0.5		0.5		0.4

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		879.7		31.1		28.5		48.8		78.6		87.7		95.1		100.7		87.6		110.1		85.7		79.1		46.7

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		132		6.2		5.7		9.3		13.5		13.6		11.8		12.6		12.2		13.4		14.2		12.1		7.5

Most Rain Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		94		43		43		33		80		69		91		79		73		94		79		51		31

Avg. No. of Days w/Rain Above 0.1in/2mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		72.6		18.4		14		10.8		4.5		0.4		---		---		---		---		1.7		7.7		15.1

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53.2		2		1.6		3.5		5.5		5.8		5.5		5.3		5		5.6		5.1		4.8		3.4

Avg. No. of Days w/Rain Above 0.4in/10mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29.8		1		0.9		1.6		2.5		2.7		3.7		3.3		3.2		3.8		2.8		2.8		1.6

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.1		0.2		0.2		0.2		0.4		0.5		0.7		1		0.6		1.1		0.5		0.5		0.2

Avg. No. of Days w/Rain Above 3.9in/10cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.2		0.8		0.5		0.6		0.1		---		---		---		---		---		---		0.3		1

Average Snowfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		203.5		52.6		36.1		30		10.2		0.6		---		---		---		---		2.9		18.9		52.1

Average Snow Cover at Month End

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		3		14		10		1		---		---		---		---		---		---		---		1		9

Deepest Snow Cover Reported

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		50		46		50		32		15		---		---		---		---		---		10		12		40

Most Snow Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		34.4		29.8		22		18.2		13.2		7.2		---		---		---		0.4		12.2		17.6		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		14		15.2		15.9		15.5		14.4		12.9		11.5		10.2		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		13.1		6.1		9.2		12.3		15.6		18.8		21.4		21.2		18		14.5		9.5		5.5		4.8

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		3.5		5.2		7		8.2		8.7		8.2		7.2		5.6		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		14.7		11.5		14.1		15.2		15.9		17.2		18.6		18.9		17.7		16.6		13		8.6		9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.7		11.5		14.3		14.5		14.8		16.9		19.9		20.6		17.9		16.7		12.4		8		8.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		6.1		9.2		12.3		15.6		18.8		21.4		21.2		18		14.5		9.5		5.5		4.8

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		8.5		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		17.5		14.3		16		18.4		19.2		19.8		21.1		21.2		20.4		21		15.9		10.3		11.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		15.2		16.7		19.5		20.4		22		25.8		25.7		23		24.2		16.6		10.2		12.3

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		5.6		7.6		9.6		12.7		15.7		17.4		17.2		16.1		11.1		7.5		4.1		3.8

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		2.3		3.3		4.8		6.5		7.8		8		7.6		6.7		4.7		3.8		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		10		10.6		10.9		12.8		14.4		15.2		15.4		15.6		11.9		9.5		5.7		6.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.9		9.6		9.9		8.7		9.9		11.7		13.1		13.5		14.2		9.7		7.9		4.5		5.5