ST. CATHARINES, ONTARIO

Average Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		48.2		25.5		26.4		33		45.1		56.4		66.3		71.5		69.7		62.2		50.8		41		31

Average High Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		56.5		31.6		33.2		40.7		54.2		66.9		76.5		81.4		79.3		71.3		59.2		47.6		36.6

Average Low Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		39.9		19.4		19.8		25.3		36.1		45.8		56		61.6		60.1		52.9		42.4		34.4		25.3

Highest Recorded Temperature

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		98.6		63.5		65.3		78.8		87.8		92.3		98.6		97.7		96.1		94.1		84		72.5		70.7

Lowest Recorded Temperature

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-18.4		-14.8		-18.4		-6.7		14.9		25		32		42.1		36		30		18		10		-14.8

Average Number of Days Above 95F/35C

Years on Record: 26

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

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		14		---		---		---		0.1		0.3		3.7		6.2		2.6		1.1		---		---		---

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		126.3		---		---		0.6		3		12.7		25.4		30.3		30.1		19		5		0.3		---

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		215		1.2		1.4		5.5		17.5		29.8		30		31		31		30		25.4		10.3		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		313.3		12.7		14.1		23.8		29.6		31		30		31		31		30		31		28.6		20.5

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		158.1		30.1		26.9		27.6		16		4.3		---		---		---		0.6		7.6		18		27.1

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		131.3		28.1		25		24		11.3		1.8		---		---		---		0.2		4		13.3		23.7

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		91.2		23.9		20.6		17.1		4.1		0.1		---		---		---		---		0.8		7.1		17.5

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		28.3		11.1		8.7		3.9		---		---		---		---		---		---		---		0.1		4.6

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		2.2		1.4		0.6		---		---		---		---		---		---		---		---		---		0.2

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

Years on Record: 26

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Average Precipitation

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		34.3		2.3		1.9		2.2		2.9		3.2		3.3		3.3		2.7		3.5		3		3.3		2.8

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		121.7		11		9.3		9.9		11.1		10.6		10.1		8.5		8.5		9.7		9.3		11.4		12.3

Most Precipitation Reported in a Day

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		3.1		1.7		1.4		1.5		1.7		2.3		3		2.7		2		3.1		2.2		2.2		1.2

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		119.7		11.1		8.4		9.3		10.9		10.7		9.6		8.8		8.5		9.6		10		11.3		11.5

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		55.9		3.5		3.3		4		4.9		5.3		5.2		4.7		4		5.4		5		5.8		4.8

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		30.7		1.6		1.6		2		2.8		3		3		2.9		2.4		3.1		2.7		3		2.6

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		5.4		0.3		0.1		0.2		0.4		0.4		0.7		1		0.6		0.7		0.4		0.4		0.3

Average Rainfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		29.8		1		1		1.4		2.7		3.2		3.3		3.3		2.7		3.5		3		2.9		1.8

Average Number of Rainy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		95.4		3.2		3.8		5.6		9.8		10.7		9.6		8.8		8.5		9.6		10		9.6		6.1

Most Rain Reported in a Day

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		3.1		1.7		1.4		1.5		1.7		2.3		3		2.7		2		3.1		2.2		2.2		1.2

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		48.7		1.4		1.9		2.7		4.5		5.3		5.2		4.7		4		5.4		5		5.6		3.1

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		27.6		0.9		1		1.2		2.6		3		3		2.9		2.4		3.1		2.7		3		1.8

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		5.3		0.2		0.1		0.1		0.4		0.4		0.7		1		0.6		0.7		0.4		0.5		0.2

Average Snowfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		45.7		13.4		8.5		7.8		2.4		0.1		---		---		---		---		---		3.1		10.5

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29.5		8		6		4.3		1.6		0.1		---		---		---		---		---		2.5		7

Average Snow Cover

Years on Record: 1

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		0.7		4.3		0.4		2		---		---		---		---		---		---		---		---		1.9

Average Snow Cover at Month End

Years on Record: 1

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		0.1		---		0.8		---		---		---		---		---		---		---		---		---		0.5

Deepest Snow Cover Reported

Years on Record: 2

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		12.6		12.6		2.4		7.9		---		---		---		---		---		---		---		3.9		5.9

Most Snow Reported in a Day

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		15		15		13.8		7.5		6.9		1.4		---		---		---		---		1		11		10.8

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		27.7		8.2		5		4.5		1.6		0.1		---		---		---		---		---		2.2		6.2

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		7.5		2.2		1.4		1.4		0.3		---		---		---		---		---		---		0.5		1.7

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		2.9		0.8		0.5		0.7		0.1		---		---		---		---		---		---		0.2		0.6

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

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

Years on Record: 1

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		---		17		8		17		---		---		---		---		---		---		---		0.3		---

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

Years on Record: 1

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		---		15		4		10		---		---		---		---		---		---		---		---		---

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

Years on Record: 1

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		---		13		---		8		---		---		---		---		---		---		---		---		---

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

Years on Record: 1

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		---		10		---		1		---		---		---		---		---		---		---		---		---

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6665.2		1267.9		1137.1		995.1		621		269.7		---		---		---		99		448		747		1080.4

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		343.3		---		---		---		---		---		25.5		186		131.8		---		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2286.7		---		---		---		---		195.3		475.5		651		596.8		351		17.1		---		---

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		15.3		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
kWh/m2		3.7		1.4		2.2		3.3		4.6		5.5		6		6		5.2		4.1		2.7		1.6		1.2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.7		1		1.4		1.9		2.3		2.4		2.3		2		1.5		1.1		0.8		0.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4		2.4		3.3		4		4.7		5.1		5.3		5.4		5.1		4.7		3.7		2.5		2.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4		2.2		3.1		3.7		4.6		5.2		5.7		6		5.4		4.7		3.5		2.4		2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		1.4		2.2		3.3		4.6		5.5		6		6		5.2		4.1		2.7		1.6		1.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.7		1		1.5		2		2.4		2.5		2.4		2.1		1.6		1.2		0.8		0.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.9		3		4.1		5.1		5.4		6.1		6		6.1		5.9		5.7		4.3		3.4		3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		3		4.2		5.4		5.8		7.4		7.6		7.6		6.8		6.4		4.5		3.6		3.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		1.1		1.8		2.3		3.8		4.4		4.8		4.8		4.7		3.3		2.1		1.1		0.9

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		0.7		1		1.3		1.8		2		2.2		2.1		1.8		1.4		1.1		0.7		0.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.1		1.6		2.5		2.6		3.8		4.1		4.2		4.3		4.6		3.6		2.7		1.5		1.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		1.3		2		1.9		3.1		3.3		3.6		3.7		4.4		3.1		2.3		1.2		1.2