PRESTON, ONTARIO

Average Temperature

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7.4		-6.4		-5.6		-0.8		6.5		13		18		20.7		19.6		15		8.9		2.8		-3.2

Average High Temperature

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12.2		-2.7		-1.5		3.6		11.6		18.9		23.7		26.5		25.1		20.4		13.8		6.4		0.1

Average Low Temperature

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2.6		-10.1		-9.6		-5.3		1.5		7.1		12.2		14.9		14		9.6		3.9		-0.8		-6.4

Highest Recorded Temperature

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.3		14.5		14		23.5		29.5		33		37		38.3		38.3		36.1		29.4		23.3		19

Lowest Recorded Temperature

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-33		-33		-31.5		-26		-16.1		-5		-0.6		3.3		---		-3.3		-8.9		-18.3		-28.9

Average Number of Days Above 95F/35C

Years on Record: 16

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

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		7.8		---		---		---		---		0.4		1.4		3.9		1.8		0.4		---		---		---

Average Number of Days Above 86F/30C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.4		---		---		---		---		0.5		1.7		4.1		1.9		0.2		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116		---		---		0.4		3.1		12.2		23.8		29.5		27.8		15.5		3.6		0.1		---

Average Number of Days Above 50F/10C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		203.6		0.3		0.3		4.6		16.7		29.4		29.9		31		31		29.5		22.7		7		1.1

Average Number of Days Above 32F/0C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		298.6		10.2		11.4		21.5		29.2		31		30		31		31		30		31		26.7		15.7

Average Number of Days Below 35F/2C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		179.3		30.7		27.8		28.9		18.4		6.1		0.1		---		0.1		1.9		12.1		23.2		30

Average Number of Days Below 32F/0C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		152.9		29.6		26		26.2		13.4		2.6		---		---		---		0.7		7.3		18.8		28.4

Average Number of Days Below 28F/-2C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110		26.7		22.3		19.9		6.1		0.1		---		---		---		---		2.3		10.8		21.8

Average Number of Days Below 10F/-12C

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42.4		14.4		13.1		6.3		0.3		---		---		---		---		---		---		0.3		8.1

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.3		2.6		1.8		0.4		---		---		---		---		---		---		---		---		0.5

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

Years on Record: 16

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

Average Precipitation

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		976		65.1		56.8		60		83.7		89.2		79.4		106.2		96.6		87.1		80.4		98.8		72.8

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		173.5		20.5		15.7		15.2		14.2		12.7		11.9		10.9		11		12.2		13.4		16.7		19

Most Precipitation Reported in a Day

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		108		34.6		42.6		39.9		47.4		49.8		86.9		91.6		108		81.3		74.7		50.6		34

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		177.6		20.6		15.6		14.8		15.3		13.3		11.9		11.3		11.4		13.2		14.2		17.7		18.5

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59.7		3.8		3.3		4.5		5.3		5.5		5.3		5.3		5.5		4.8		5.6		5.9		4.8

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30.9		1.5		1.7		1.6		2.6		3.2		3.2		3.3		3.1		2.7		2.7		3.3		2

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.3		0.2		0.3		0.2		0.4		0.6		0.3		1.1		0.9		0.5		0.2		0.4		0.2

Average Rainfall

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		838.9		29		26.8		40.3		78.2		88.7		79.4		106.2		96.6		87.1		79		86.8		40.8

Average Number of Rainy Days

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		128		5.8		5.2		8.2		13.1		13.1		11.9		11.3		11.4		13.2		13.9		13.2		7.7

Most Rain Reported in a Day

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		108		34.6		42.2		39.9		47.4		49.8		86.9		91.6		108		81.3		74.7		50.6		34

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		51.2		1.7		1.4		2.9		5.1		5.5		5.3		5.3		5.5		4.8		5.5		5.3		3

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28.1		0.9		0.9		1.3		2.6		3.1		3.2		3.3		3.1		2.7		2.7		3.1		1.3

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.2		0.2		0.3		0.2		0.4		0.6		0.3		1.1		0.9		0.5		0.2		0.4		0.1

Average Snowfall

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		137.1		36.1		30		19.7		5.5		0.5		---		---		---		---		1.4		12		32

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		17.3		12.8		9.1		3.2		0.2		---		---		---		---		0.5		6.6		14.3

Average Snow Cover

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		3.4		12.5		15.3		7.1		0.3		---		---		---		---		---		---		0.5		4.7

Average Snow Cover at Month End

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		3.1		16		11.9		1.3		---		---		---		---		---		---		---		0.3		7.7

Deepest Snow Cover Reported

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		59		48		59		57		19		---		---		---		---		---		2		22		31

Most Snow Reported in a Day

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		27.9		27.9		22.9		20.3		14.2		4.4		---		---		---		---		10.2		22		24

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62.2		17		12.1		8.9		3.2		0.3		---		---		---		---		0.6		6.4		13.7

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7.5		2		1.9		1.3		0.2		---		---		---		---		---		---		0.2		1.9

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2		0.4		0.7		0.3		0.1		---		---		---		---		---		---		0.2		0.4

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

Years on Record: 16

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		91.9		26.2		24.5		17		1.8		---		---		---		---		---		0.1		3.8		18.5

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		67.9		21.6		20.9		11.7		0.6		---		---		---		---		---		---		0.6		12.5

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48.8		16.4		17.9		8.1		0.4		---		---		---		---		---		---		0.4		5.7

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

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		23.7		9.2		8.5		4.9		---		---		---		---		---		---		---		0.1		0.9

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2323		427.7		381.8		328		199.4		95		27.5		6.6		11.9		60.8		159.7		254.2		370.3

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		127.2		---		---		---		0.8		7.1		22.8		47.9		37.2		10.9		0.4		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1087.9		---		---		---		---		89.6		231.7		322.1		294.5		150		---		---		---

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		11.1		12.5		14		15.3		16		15.6		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		12.9		5.5		8.6		12		15.7		18.6		21.1		21.1		18.2		14.4		9.6		5.6		4.6

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		7		8.3		8.7		8.3		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		14.4		10		12.9		14.6		16.1		17		18.4		18.8		17.9		16.4		13.1		8.8		8.5

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		9.6		12.6		13.6		15.2		16.5		19.4		20.3		18.2		16.4		12.6		8.3		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		12.9		5.5		8.6		12		15.7		18.6		21.1		21.1		18.2		14.4		9.6		5.6		4.6

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		17.1		11.6		15.4		18.2		19.7		20		21		20.6		20.4		19.8		16.2		10.6		11.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.7		11.6		15.9		19.1		21.3		22.4		25.5		24.2		23.1		22		16.9		10.7		11.4

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		4.7		7.4		9.5		13.4		15.2		16.9		17.3		16.5		11.3		7.9		3.9		3.5

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.1		2.5		3.4		4.8		6.4		7.8		8		7.8		6.7		5		3.8		2.5		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		11.3		7.7		10.2		10.8		13.5		13.9		14.8		15.4		16.1		12.2		10.2		5.3		5.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.6		6.8		9.4		8.5		10.9		10.9		12.3		13.6		15		10.1		8.6		4		4.8