CHATSWORTH, ONTARIO

Average Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.5		-6.9		-6.1		-2		5.3		11.5		16.5		19.1		18.3		14.5		8.3		2.4		-3.4

Average High Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11.5		-3		-1.6		3.1		10.8		17.6		22.8		25.2		24.1		20		12.9		5.9		---

Average Low Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		1.4		-10.9		-10.6		-7.1		-0.2		5.3		10.3		13.1		12.5		9		3.6		-1.1		-6.8

Highest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.3		14		17		23		29		33		36.7		38.3		35.6		36.1		28.9		21		18

Lowest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-35.6		-35.6		-35		-32		-20		-7.8		-2.8		1.7		-0.6		-3.5		-8.3		-20.6		-30

Average Number of Days Above 95F/35C

Years on Record: 26

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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		4.9		---		---		---		---		0.2		1.1		2.3		1.1		0.2		---		---		---

Average Number of Days Above 86F/30C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.7		---		---		---		---		0.1		1.8		3		1.5		0.3		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		104.4		---		---		0.3		2.9		10.2		20.3		27.6		25.6		14.4		3.1		---		---

Average Number of Days Above 50F/10C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		196.9		0.3		0.5		4.5		15.3		27.1		29.9		31		31		29		20.2		6.9		1.2

Average Number of Days Above 32F/0C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		293.2		9.4		11		20.2		28.5		31		30		31		31		30		31		25.5		14.6

Average Number of Days Below 35F/2C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		190.7		30.7		27.5		29		21.1		10.7		1.6		---		0.2		3.2		14.1		22.9		29.7

Average Number of Days Below 32F/0C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		166.2		29.8		26.6		27.1		18.3		7		0.2		---		---		1.2		9		19.2		27.9

Average Number of Days Below 28F/-2C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		123.6		27.1		23.8		22.3		11.4		1.8		---		---		---		0.2		3.1		11.5		22.4

Average Number of Days Below 10F/-12C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48.6		14.8		13.6		9.4		0.5		---		---		---		---		---		---		0.9		9.4

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9.8		4		3		1.6		---		---		---		---		---		---		---		---		1.2

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.4		0.2		---		0.1		---		---		---		---		---		---		---		---		---

Average Precipitation

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1178		116.1		87.8		73.4		73.2		92.8		80.8		85		99.7		117.5		105.6		121.5		124.7

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		176.4		20.7		14.7		12.8		12.9		12.1		12.3		10.8		12.6		14.4		16.2		17.6		19.2

Most Precipitation Reported in a Day

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		92.6		39.2		53		51.4		54.4		60.7		75		92.6		88.9		85.5		69.1		63.5		42.7

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		181.4		19.7		14.7		12.5		13.4		13.8		12.8		11.6		13.3		14.8		17.9		18.1		18.8

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		76.2		8.3		6.1		5.5		5.2		5.9		4.7		4.7		5.4		6.3		7		8.2		9

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39.1		3.9		2.6		2.2		2.1		3.5		2.6		2.8		3.5		3.7		3.8		4		4.4

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.4		0.4		0.3		0.3		0.2		0.5		0.6		0.8		0.9		1.1		0.2		0.5		0.4

Average Rainfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		855.4		23		26.2		42.4		63.9		92.6		80.8		85		99.7		117.5		102.8		83		38.5

Average Number of Rainy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		128.5		3.7		3.4		6.5		11.9		13.8		12.8		11.6		13.3		14.8		17.7		13.2		5.9

Most Rain Reported in a Day

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		92.6		36.4		45		51.4		54.4		60.7		75		92.6		88.9		85.5		69.1		47.2		37.3

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		52.4		1.8		1.7		3		4.6		5.9		4.7		4.7		5.4		6.3		6.7		5.2		2.6

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29		0.9		1		1.3		1.9		3.5		2.6		2.8		3.5		3.7		3.7		2.8		1.4

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.4		0.1		0.1		0.3		0.2		0.5		0.6		0.8		0.9		1.1		0.2		0.4		0.1

Average Snowfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		322.6		93.1		61.6		31		9.3		0.2		---		---		---		---		2.7		38.5		86.2

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64.9		18.5		12.5		7.8		2.8		0.2		---		---		---		---		0.9		7.2		14.9

Average Snow Cover

Years on Record: 2

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		---		15.8		15.4		---		---		---		---		---		---		---		---		---		---

Average Snow Cover at Month End

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		3.7		12.3		19.3		---		---		---		---		---		---		---		---		2.3		11

Deepest Snow Cover Reported

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		72		72		37		48		2		---		---		---		---		---		---		20		56

Most Snow Reported in a Day

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		63.5		36.8		53		41.7		30.5		8.1		---		---		---		3.6		18		63.5		42.7

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		60.8		17.2		12.2		7.3		2.6		0.1		---		---		---		---		0.9		6.7		13.9

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.9		6.5		4.4		2.3		0.4		---		---		---		---		---		0.2		2.9		6.3

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9.4		2.8		1.5		0.8		0.2		---		---		---		---		---		0.1		1.2		2.9

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.9		0.4		0.2		---		---		---		---		---		---		---		---		0.1		0.3

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2485.9		437.3		389.3		346.2		219.6		120.3		45.6		17.2		23.3		73.7		167.6		262.7		383.2

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		89.7		---		---		---		0.9		5.2		17		32.2		25.1		8.6		0.7		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		885.1		---		---		---		---		46.5		188.3		275.6		251.4		123.3		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.9		11		12.5		14		15.4		16.1		15.7		14.5		13		11.4		10.1		9.5

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		5.4		8.6		12		15.8		19.5		21.8		21.6		18.4		14.3		9		5		4.4

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		2.4		3.4		5.1		6.8		8.1		8.6		8.1		7.1		5.5		4		2.6		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		14.5		10.2		13.4		15.1		16.3		17.9		18.9		19.2		18.1		16.6		12.5		8		7.8

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		9.9		13.3		14.2		15.6		18.4		20.9		21.5		19		16.9		11.9		7.3		8.1

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		5.4		8.6		12		15.8		19.5		21.8		21.6		18.4		14.3		9		5		4.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.5		2.4		3.5		5.2		7		8.4		9		8.7		7.5		5.8		4.1		2.7		2.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.6		12.7		16.5		20.1		21		20		21.6		21.9		20.8		21.4		16.2		9.3		10.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.1		13		17.8		22		24		22.7		27.1		27.5		24.1		25		17.1		9		11.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.5		4.5		7.1		10.1		13		15.4		17.4		16.7		15.6		10.7		7.7		4		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		4.8		2.2		3.1		4.4		6		7.7		7.8		7.3		6.5		4.5		3.7		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		11.3		7.8		10.1		12.1		13.1		14.1		15.2		14.9		15.2		11.6		10.1		5.8		5.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.7		7		9.2		10		10.6		11.4		13.2		12.8		13.7		9.3		8.8		4.7		5.4