THORNBURY, ONTARIO

Average Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7		-6.3		-5.4		-1.5		5.5		11.5		16.7		19.8		19.2		15.5		9.1		3.1		-2.7

Average High Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11.4		-2.6		-1.5		2.9		10.2		16.6		22		24.8		24		20.1		13.2		6.5		0.6

Average Low Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2.7		-9.9		-9.3		-5.8		0.9		6.2		11.4		14.8		14.3		10.8		4.9		-0.3		-5.9

Highest Recorded Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		36		15		18		24		30.5		32.8		34		35.5		36		33.5		28.9		22.5		20

Lowest Recorded Temperature

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-31.5		-30.6		-31.5		-28		-13.3		-3.3		0.6		5		3.9		-2		-5		-16.5		-26

Average Number of Days Above 95F/35C

Years on Record: 25

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

Average Number of Days Above 90F/32C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		---		---		---		---		0.3		1.3		2.7		1.3		0.3		---		---		---

Average Number of Days Above 86F/30C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7.1		---		---		---		---		0.2		1.7		2.9		1.8		0.5		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		101.2		---		---		0.5		2.5		8.4		18.9		27.3		25.9		14.4		3.3		0.1		---

Average Number of Days Above 50F/10C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		195.1		0.3		0.6		4.3		12.8		26.5		29.9		31		31		29.4		21.1		6.9		1.2

Average Number of Days Above 32F/0C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		298.1		9.9		11.4		20.3		28.9		31		30		31		31		30		31		26.4		17.3

Average Number of Days Below 35F/2C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		176.6		30.5		27.5		28.9		20.2		6.2		0.1		---		---		0.7		10.1		22.8		29.6

Average Number of Days Below 32F/0C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		148.9		29.5		26.3		26.5		15.3		2.3		---		---		---		0.2		4.1		17.4		27.3

Average Number of Days Below 28F/-2C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		111.2		27.3		23.8		21.5		7.3		0.1		---		---		---		---		0.6		9.3		21.5

Average Number of Days Below 10F/-12C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42.4		15		12.1		7		0.3		---		---		---		---		---		---		0.6		7.4

Average Number of Days Below -4F/-20C

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.6		2.2		1.5		0.5		---		---		---		---		---		---		---		---		0.4

Average Number of Days Below -22F/-30C

Years on Record: 25

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Average Precipitation

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		991.9		100		68.4		64		65.3		82.7		79.1		72.1		78.2		95.9		87.3		99.6		99.4

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		158.3		18.8		13.2		13		11.4		10.8		10.5		9.5		10.5		12.9		14.7		16		17

Most Precipitation Reported in a Day

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		89.4		32		50		39		63.2		67.8		60		67.4		89.4		68		37.2		54.6		32

Avg. No. of Days w/Precip. Above 0.1in/2.5mm

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		163		18.9		13.3		12.5		12.6		12		10.6		9.5		10.8		13.2		15.8		16.3		17.6

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		65		7.2		5.1		4.1		4.3		5.3		4.3		4		4.2		5.7		6.1		6.8		7.8

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29.7		2.6		1.8		1.8		1.9		2.9		3		2.2		2.5		3		2.6		2.8		2.6

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.6		0.1		0.1		0.2		0.2		0.4		0.6		0.7		0.7		0.8		0.3		0.4		0.2

Average Rainfall

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		725.3		20.9		19.4		36.7		57.4		82.7		79.1		72.1		78.2		95.9		84		70.4		28.5

Average Number of Rainy Days

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116.9		4.2		3.8		6.9		11.5		12		10.6		9.5		10.8		13.2		15.5		12.5		6.4

Most Rain Reported in a Day

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		89.4		26.6		46		39		63.2		67.8		60		67.4		89.4		68		37.2		54.6		30.2

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		43.9		1.4		1.2		2.1		3.6		5.3		4.3		4		4.2		5.7		5.9		4.5		1.7

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.6		0.6		0.6		1.1		1.6		2.9		3		2.2		2.5		3		2.5		1.9		0.8

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.2		0.1		---		0.2		0.2		0.4		0.6		0.7		0.7		0.8		0.3		0.3		---

Average Snowfall

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		266.6		79.1		49		27.4		7.9		---		---		---		---		---		3.3		29.2		70.8

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		54.8		16		10.7		7.4		2.1		---		---		---		---		---		0.8		5.4		12.3

Average Snow Cover at Month End

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		5.7		34.5		28		---		---		---		---		---		---		---		---		---		6.3

Deepest Snow Cover Reported

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		50		50		47		28		1		---		---		---		---		---		---		---		19

Most Snow Reported in a Day

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		32		32		23		22		17		1		---		---		---		---		17		31		32

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53.6		15.9		10.6		7		2.2		---		---		---		---		---		0.7		5		12.3

Avg. No. of Days w/Snowfall Above 2in/5cm

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		19.6		5.5		3.7		1.8		0.5		---		---		---		---		---		0.3		2		5.7

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

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.3		1.8		1.2		0.5		0.2		---		---		---		---		---		0.1		0.8		1.8

Avg. No. of Days w/Snowfall Above 10in/25cm

Years on Record: 25

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

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2368.1		424.6		379		336.6		215.3		116.6		41.6		10.1		13.5		58.9		156.2		252.2		363.6

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110.3		---		---		0.1		1.1		5.2		19		41.4		32.5		10.2		0.8		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		978.5		---		---		---		---		46.5		198.3		301.4		279		153.3		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		9.8		11		12.5		14		15.4		16.1		15.7		14.5		13		11.4		10.1		9.4

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.8		5.7		9		13.4		16.3		18.7		20.6		20.4		17.6		13.4		8.6		5.1		4.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		2.2		3.2		4.7		6.7		8.1		8.7		8.3		7.2		5.5		3.9		2.5		1.9

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		11.6		14.9		17.9		17		17.2		17.9		18.2		17.3		15.4		12		8.5		8.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15		11.8		15.4		18.1		17		17.2		19		19.5		17.7		15.2		11.4		8.1		9.6

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.8		5.7		9		13.4		16.3		18.7		20.6		20.4		17.6		13.4		8.6		5.1		4.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		2.3		3.4		5.1		7		8.4		9		8.6		7.4		5.7		4		2.6		1.9

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		14.1		17.5		22.2		21.4		19.8		20.6		21.7		20.3		19.9		15.5		11.1		12.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.6		14.9		19		25.1		25		22.4		24.9		27.4		23.5		22.5		16.1		11.1		14.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.6		5.2		7.6		11.2		13.8		15.1		17.1		17.2		15.5		10		7.1		3.7		3.7

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.7		2		2.9		3.8		5.8		7.7		8.1		7.3		6.5		4.8		3.7		2.3		1.7

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		10		11.8		13.8		14		13.8		14.9		15.4		15.2		10.8		9.2		5.3		6.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.3		9.7		11.1		12.7		12.1		11		13		13.9		13.8		8.5		7.8		4.2		6.4