PETROLIA, ONTARIO

Average Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.8		-5		-3.5		1.1		7.6		13.8		19.1		21.7		20.7		16.9		10.4		4.3		-1.8

Average High Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.7		-1.3		0.6		5.8		13		19.8		25.2		27.7		26.4		22.6		15.3		8		1.6

Average Low Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.8		-8.6		-7.5		-3.6		2.1		7.7		13		15.7		15		11.1		5.5		0.6		-5.1

Highest Recorded Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		39.5		15		21		26.5		31.5		33.5		39.5		38		38		35.5		29.4		23.3		18.5

Lowest Recorded Temperature

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-30		-30		-27		-25		-13		-2.5		-1.7		5.6		2		-2		-7.2		-17.2		-22

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		0.6		---		---		---		---		---		0.2		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		16.3		---		---		---		---		1.1		4.1		6.5		3.3		1.3		---		---		---

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		18.2		---		---		---		---		1		5		7.1		3.8		1.5		---		---		---

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		130.3		---		0.1		1.1		4.4		14.5		25		29.9		29.4		20.1		5.7		0.3		---

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		217.7		0.9		1.1		7.5		19.7		29.4		30		31		31		30		25.9		9.5		1.9

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		315.3		13.3		15.6		24.7		29.6		31		30		31		31		30		31		28.2		19.9

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		164.2		30.4		27.4		26.7		16.7		4.4		0.1		---		0.1		0.8		8.8		20		28.8

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		138.1		28.8		25.8		24		11.9		1.4		---		---		---		0.3		4.3		15.5		26.3

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		97.3		24.4		21		17.8		5.2		0.1		---		---		---		---		0.9		8.4		19.5

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		30.3		11.4		8.8		3.4		0.1		---		---		---		---		---		---		0.1		6.5

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		2.2		1.3		0.7		0.1		---		---		---		---		---		---		---		---		0.2

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		960.6		66.2		56.6		62.5		86.9		87		90.1		75.7		81.8		107.3		81.7		89.3		75.5

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		155.8		15.6		12.4		13.5		14.6		11.5		11.7		10.8		11.7		11.5		12.9		14.5		14.9

Most Precipitation Reported in a Day

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		142.6		33.4		48.8		44.4		60.2		52.8		142.6		72.2		56.4		73.6		62.4		49.5		51.6

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		161.5		16.4		12.7		13.7		15.5		13		11.8		11.3		11.5		12		13.5		15.3		15

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		59.2		4.5		3.9		4		6		5.5		4.9		4.3		4.9		5.5		5.1		5.4		5.2

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		30.1		1.4		1.7		1.8		2.8		2.8		3.1		2.7		2.8		3.2		2.6		2.9		2.5

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		5.2		0.1		0.2		0.2		0.3		0.5		0.5		0.4		0.6		1.3		0.5		0.5		0.2

Average Rainfall

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		842.7		26.9		31.4		44.6		83.6		87		90.1		75.7		81.8		107.3		81.6		83.5		49.3

Average Number of Rainy Days

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		133.2		6.3		6.3		9.5		14.8		13		11.8		11.3		11.5		12		13.5		13.9		9.3

Most Rain Reported in a Day

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		142.6		33.4		48		44.4		60.2		52.8		142.6		72.2		56.4		73.6		62.4		49.5		51.6

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		50.6		1.8		2		2.8		5.7		5.5		4.9		4.3		4.9		5.5		5		4.9		3.3

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		27.4		0.7		1		1.2		2.8		2.8		3.1		2.7		2.8		3.2		2.6		2.8		1.7

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		5.1		---		0.1		0.2		0.3		0.5		0.5		0.4		0.6		1.3		0.5		0.5		0.1

Average Snowfall

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		117.8		39.2		25.2		17.9		3.3		---		---		---		---		---		0.1		5.8		26.2

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35.6		10.8		7.4		5.3		1.4		---		---		---		---		---		0.1		2.7		7.9

Average Snow Cover

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		2.3		10.3		8.4		3.6		---		---		---		---		---		---		---		0.2		4.8

Average Snow Cover at Month End

Years on Record: 24

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		1.9		9.9		7		0.2		---		---		---		---		---		---		---		1		4.9

Deepest Snow Cover Reported

Years on Record: 24

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		112		112		48		28		4		---		---		---		---		---		---		8		39

Most Snow Reported in a Day

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		40.6		28		40.6		20.8		17.8		---		---		---		---		---		11.7		25.4		29.5

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		36.8		11.3		7.9		6		1.6		---		---		---		---		---		0.1		2.1		7.8

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		7.5		2.5		1.7		1.1		0.1		---		---		---		---		---		---		0.3		1.7

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		2		0.7		0.5		0.3		---		---		---		---		---		---		---		---		0.4

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		0.1		---		---		---		---		---		---		---		---		---		---		---		---

Av. # of Days w/Snow Depth Above 0.4in/10mm

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		83.8		26.2		25.6		13.8		0.5		---		---		---		---		---		---		1.7		16

Avg. # of Days w/Snow Depth Above 2in/5cm

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		52.4		18.5		17.4		8.2		---		---		---		---		---		---		---		0.3		8

Av. # of Days w/Snow Depth Above 3.9in/10cm

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		36.6		13.2		11.7		6.4		---		---		---		---		---		---		---		---		5.3

Av. # of Days w/Snow Depth Above 7.8in/20cm

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17.5		8.8		2.7		1.8		---		---		---		---		---		---		---		---		4.2

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2097.6		399.3		350.4		291.2		181.1		82.6		21.4		4.6		6.4		43.2		134.9		234.9		347.6

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		179.6		---		---		0.2		1.1		11.3		36.6		59.5		50.1		19.3		1.6		0.1		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1272.7		---		---		---		---		117.1		263.3		356.5		328.9		198.3		8.6		---		---

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		15.9		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		4.7		7.5		11.5		16.1		19.7		22.1		22.4		19		14.9		9.4		5.3		4.1

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		8.1		8.5		8		7		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		14.2		7.8		10.7		13.9		16.6		18.1		19.3		20		18.7		17.1		12.9		8		7.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.3		7		9.7		12.7		15.8		18.5		21.5		22.9		19.9		17.6		12.3		7.3		6.7

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		4.7		7.5		11.5		16.1		19.7		22.1		22.4		19		14.9		9.4		5.3		4.1

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		17.3		9.8		14.4		18.1		20.2		20.2		21.9		22.6		21.9		22.2		15.6		10		10.5

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		9.6		14.8		19		22.4		22.7		27.6		29.1		26.3		26.4		15.9		9.9		10.9

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.2		3.3		6.2		7.3		13.5		16.1		17.2		16.1		16.7		11.6		7		3.8		3.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		2.2		3.4		4.8		6.3		7.7		7.7		7.1		6.2		4.4		3.9		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		10.6		4.7		8.2		8		13.6		14.8		15.1		14.4		16.3		12.7		8.7		5.2		4.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.6		3.4		6.5		5		11.1		12.3		12.8		11.8		15.3		10.7		6.9		4		3.9