CHATHAM - RIVERFRONT, ONTARIO

Average Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9.8		-3.6		-2.4		1.9		8.5		14.6		20.3		22.6		21.6		17.8		11.3		5.2		-0.9

Average High Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.1		-0.3		1.2		6		13.5		19.9		25.5		27.7		26.5		22.7		15.5		8.5		2.1

Average Low Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5.4		-6.9		-5.9		-2.2		3.6		9.4		15		17.5		16.7		13		6.9		1.8		-3.9

Highest Recorded Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.5		14		19		25		30		32.5		38.5		37.5		36.5		33.5		29		22.5		19

Lowest Recorded Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-27		-27		-23.5		-22		-8		-2.5		1.5		6		6		1.5		-4.5		-10		-23

Average Number of Days Above 95F/35C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.6		---		---		---		---		---		0.1		0.3		0.1		---		---		---		---

Average Number of Days Above 86F/30C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		---		---		---		---		1		4.9		6.5		3.7		0.8		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		132.1		---		---		0.7		4.2		14.1		26		30.7		30		21		5.3		0.2		---

Average Number of Days Above 50F/10C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		221.2		1.1		1.3		7.1		20.6		30.2		30		31		31		29.9		26.1		11.1		1.8

Average Number of Days Above 32F/0C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		319.4		14.8		16		25.4		29.9		31		30		31		31		30		31		28.6		20.7

Average Number of Days Below 35F/2C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		146.9		29.6		27		25.7		12.7		1.1		---		---		---		0.1		5		17.6		28

Average Number of Days Below 32F/0C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		118.3		26.9		24.5		21.8		7.5		0.1		---		---		---		---		1.7		11.8		24.1

Average Number of Days Below 28F/-2C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		80.4		22.3		19.4		14.3		2.5		---		---		---		---		---		0.1		5.6		16.3

Average Number of Days Below 10F/-12C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.9		9.5		6.5		2		---		---		---		---		---		---		---		---		5

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.4		0.8		0.3		---		---		---		---		---		---		---		---		---		0.3

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

Years on Record: 23

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Average Precipitation

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		882.3		62.7		54.1		59.9		79.7		79.7		77.9		85.4		79.3		89.1		70.7		76.8		67

Most Precipitation Reported in a Day

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		86.1		38		49.2		34.6		67		43.2		66.4		86.1		67.2		84.8		56.8		32		34.2

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		137.1		12.5		9.3		11		13.5		13.3		10.9		9.7		9.6		10.2		11.9		12.6		12.7

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		54.1		4		3.5		4.4		5.3		5.2		4.5		4.4		4.3		5		4.4		5.1		4.1

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28.4		1.8		1.8		1.8		2.6		2.5		2.8		2.6		2.7		2.9		2.1		2.7		2.2

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.7		0.3		0.3		0.1		0.4		0.6		0.5		0.9		0.7		0.8		0.5		0.4		0.3

Avg. No. of Days w/Rain Above 0.1in/2mm

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		118		5.4		5.2		8.4		13.1		13.3		10.9		9.7		9.6		10.2		11.9		11.9		8.3

Average Rainfall

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		803.1		31.6		36.5		48.6		78.3		79.7		77.9		85.4		79.3		89.1		70.7		75		51.1

Most Rain Reported in a Day

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		86.1		34		49.2		34.6		67		43.2		66.4		86.1		67.2		84.8		56.8		32		34.2

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		49.3		2.1		2.3		3.6		5.3		5.2		4.5		4.4		4.3		5		4.4		5		3.3

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		26.5		1.1		1.3		1.5		2.5		2.5		2.8		2.6		2.7		2.9		2.1		2.7		1.8

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.6		0.2		0.3		0.1		0.4		0.6		0.5		0.9		0.7		0.8		0.5		0.4		0.3

Average Snowfall

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		79.2		31.1		17.6		11.3		1.4		---		---		---		---		---		---		1.7		15.9

Average Snow Cover

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		0.9		4.6		2.5		1		---		---		---		---		---		---		---		0.1		2

Average Snow Cover at Month End

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		1		6.7		2.2		0.5		---		---		---		---		---		---		---		0.1		2.3

Deepest Snow Cover Reported

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		44		44		40		25		3		---		---		---		---		---		---		7		22

Most Snow Reported in a Day

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		26		26		20		15		4.5		---		---		---		---		---		1		5.2		18

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.4		7.5		4.7		3.5		0.8		---		---		---		---		---		---		0.9		5

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.6		1.9		1.2		0.7		---		---		---		---		---		---		---		---		0.8

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

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.8		0.7		0.5		0.3		---		---		---		---		---		---		---		---		0.4

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

Years on Record: 23

		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: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		46.1		18.2		10.5		7.6		0.5		---		---		---		---		---		---		0.9		8.4

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

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		20.2		10.5		2.8		3.4		---		---		---		---		---		---		---		0.2		3.4

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

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.3		6.7		2.3		0.6		---		---		---		---		---		---		---		---		1.8

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

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.3		1.7		---		---		---		---		---		---		---		---		---		---		0.6

Heating Degree Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3409.2		679.8		585.6		509.3		294.9		115.6		---		---		---		15.9		217.9		393.9		596.1

Cooling Degree Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		292.8		---		---		---		---		---		59.1		132.4		101.4		---		---		---		---

Growing Degree Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1476.1		---		---		---		---		142.6		309		390.6		359.6		234		40.3		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10		11.1		12.5		13.9		15.2		15.8		15.5		14.3		12.9		11.5		10.3		9.7

Average Wind Speed

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		13.7		16.7		15.1		15.1		15		13.5		12		10.2		9.8		11.2		13.3		16.6		16.1

Highest Reported Hourly Wind Speed

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		77		64		61		58		77		63		61		43		45		50		64		66		74

Average Primary Wind Direction

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		225		225		225		315		315		225		225		225		225		225		225		225		225

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		7.5		11.4		15.8		18.9		21.5		21.5		18.3		15.2		10		5.8		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		5.5		2.6		3.7		5.4		7		8.3		8.7		8.2		7.3		5.6		4.2		2.9		2.3

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		8.2		10.2		13.5		16.1		17.4		18.7		19.1		18		17.3		13.6		8.9		7.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.8		7.3		9		12		14.9		16.9		20		20.8		18.2		17.8		13.1		8.3		6.8

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		7.5		11.4		15.8		18.9		21.5		21.5		18.3		15.2		10		5.8		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		5.7		2.7		3.8		5.4		7.2		8.5		9		8.8		7.6		6		4.3		3		2.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.7		10.2		13.8		17.1		18.8		20.2		20.6		21.4		20.2		21.2		15.9		11.2		10.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.2		9.8		14		17.5		19.5		22.6		24.2		25.8		22.5		24.4		16.3		11.3		10.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.6		4.3		5		9.3		12.9		16.4		18.6		17.6		15.9		11.9		8.3		4.1		3.4

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		3.3		5		6.7		7.8		8.2		7.6		6.8		4.8		4		2.6		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		11.1		6.5		6.1		10.4		12.9		15		16.3		15.7		15.5		12.9		10.6		5.4		5.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.2		5.4		4		7.9		9.9		12.5		14.8		13.9		13.8		10.9		9.1		4.1		4