SARNIA, ONTARIO

Average Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.3		-4.8		-3.7		0.6		6.9		12.7		18.2		21.1		20		16.4		10.1		4.3		-1.8

Average High Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		-1.2		0.2		4.9		12		18.3		23.8		26.4		25.2		21.7		14.7		8		1.5

Average Low Temperature

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.7		-8.3		-7.5		-3.6		1.7		7.1		12.6		15.8		14.8		11		5.3		0.6		-5.1

Highest Recorded Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		39.1		15		19.4		25.6		31.2		32.9		39.1		37.3		37.9		34.4		29.4		23.3		18

Lowest Recorded Temperature

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-28.9		-28.9		-26.9		-25.6		-10		-3		-1.1		6.1		1.2		-1.6		-8.9		-12.8		-23.6

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		0.6		---		---		---		---		---		0.2		0.3		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		14.1		---		---		---		---		0.9		3.4		5.8		3		0.9		---		---		---

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		14.6		---		---		---		---		0.8		3.9		6		2.9		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		120.8		---		---		0.8		4.5		11.9		22.3		29.1		28.5		18.3		5.1		0.2		---

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		211		0.9		1.2		5.8		16.2		27.9		30		31		31		30		25		10.1		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		314.2		13.8		14.8		23.9		29.5		31		30		31		31		30		31		28.4		19.9

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		162.1		30.1		27.5		27.8		17.2		3.3		---		---		---		0.2		7.2		19.6		29.2

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		132.7		28		25.2		24.8		10.8		0.6		---		---		---		0.1		2.8		14.5		25.7

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		99.2		25		22.1		18.4		5		---		---		---		---		---		0.7		8.4		19.5

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		30.4		11.5		8.9		3.6		---		---		---		---		---		---		---		0.2		6.3

Average Number of Days Below 0F/-17C

Years on Record: 12

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

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		2.3		1.2		0.8		0.1		---		---		---		---		---		---		---		---		0.3

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

Years on Record: 26

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Lowest Reported Wind Chill

Years on Record: 38

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-40.9		-40.9		-37.9		-30.1		-18.7		-7.3		---		---		---		-4.3		-9.3		-20.3		-32

Highest Reported Humidex

Years on Record: 38

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		49.9		17.2		21.5		30		35		38.8		44.3		49.9		47.3		43.8		34.9		26.1		22.4

Average Precipitation

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		878.2		51.5		50.9		57.5		71.5		79.7		83.1		78.5		78.5		104.7		76.1		82.4		63.9

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		147.1		14.6		12.4		13		13.2		11.6		10.9		10.7		10.3		11.3		11.3		13.3		14.4

Most Precipitation Reported in a Day

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		95.8		39.8		39		46.2		51.2		41.6		88.5		72.4		59.4		95.8		63.8		54.4		37.6

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		150		15		11.9		12.9		14		12.6		10.9		10.9		10.4		11.4		12.2		13.7		14.2

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		53.2		3.2		3.2		4.1		5.1		5		4.7		4.3		4.6		5.3		4.6		4.6		4.6

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		27		1.2		1.6		1.7		2.2		2.8		2.4		2.3		2.5		3.5		2.6		2.5		1.7

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		5.7		0.1		0.2		0.2		0.2		0.5		0.7		0.7		0.7		1.1		0.4		0.7		0.2

Average Rainfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		770		22.9		26.4		38		66.8		79.7		83.1		78.5		78.5		104.7		75.6		76.3		39.6

Average Number of Rainy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116.7		5		4.9		7.5		12.4		12.6		10.9		10.9		10.4		11.4		12.2		11.5		7.2

Most Rain Reported in a Day

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		95.8		29.6		39		46.2		51.2		41.6		88.5		72.4		59.4		95.8		63.8		54.4		37.6

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		46.7		1.7		1.8		2.7		4.8		5		4.7		4.3		4.6		5.3		4.5		4.3		2.9

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		24.9		0.7		1		1.3		2.1		2.8		2.4		2.3		2.5		3.5		2.6		2.4		1.3

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		5.5		0.1		0.2		0.2		0.2		0.5		0.7		0.7		0.7		1.1		0.4		0.7		0.1

Average Snowfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		112		31		24.9		19.1		4.5		---		---		---		---		---		0.5		5.9		26.1

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		44		11.6		9.1		6.9		2.4		---		---		---		---		---		0.5		3.7		9.9

Average Snow Cover

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		1.7		7.3		7.1		2.6		0.2		---		---		---		---		---		---		0.2		3.2

Average Snow Cover at Month End

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		1.6		7.9		5.7		0.4		---		---		---		---		---		---		---		0.2		5.3

Deepest Snow Cover Reported

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		60		60		43		38		23		---		---		---		---		---		8		17		53

Most Snow Reported in a Day

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		38		23.6		33		33.3		21.4		---		---		---		---		---		17.8		18.5		38

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		41.4		11.3		8.4		7		2.4		---		---		---		---		---		0.2		3		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		6.6		1.7		1.5		1.4		0.2		---		---		---		---		---		---		0.2		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		0.5		0.5		0.4		---		---		---		---		---		---		---		0.1		0.5

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		---		---		---		---		---		---		---		---		---		---		---		---

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		68.8		21.5		20.5		11.1		1.6		---		---		---		---		---		---		1.3		12.8

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42		14		14.4		6.4		0.2		---		---		---		---		---		---		0.3		6.6

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25		9.9		7.9		3.5		0.2		---		---		---		---		---		---		0.1		3.3

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7.1		3.2		2.3		0.8		---		---		---		---		---		---		---		---		0.9

Average Relative Humidity

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		73		77		76		74		70		69		70		69		72		74		74		76		78

Average Morning Relative Humidity

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		85.9		83.5		82.8		84		83.2		83.8		86.3		89		91.5		90.5		86.6		84.8		84.7

Average Evening Relative Humidity

Years on Record: 2

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		67.4		76		79.9		70.8		56.1		59.2		62		59.6		67		67.9		67.7		66.2		75.9

Average Dew Point

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		4		-7		-7		-3		2		7		13		16		15		12		6		---		-5

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2156.8		399.1		352.1		298.8		192.9		99.9		28.2		5.6		8.7		47.5		140.2		235.1		348.8

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		153		---		---		0.1		1.1		8		28.6		55.3		43.8		15		1.1		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1155.3		---		---		---		---		84.4		240		337.6		310		183.3		---		---		---

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		14		15.2		15.9		15.5		14.4		12.9		11.5		10.2		9.6

Average Monthly Sunshine

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		2060.9		81.7		100.3		139.9		185.2		236.6		266.3		299.1		254.3		191.3		151.2		87.6		67.4

Average Number of Days with Sun

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		287.6		19.2		19.4		22.6		24.4		27.6		27.4		30.1		28.3		26.3		25.4		19.6		17.4

Average Possibility of Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		44		28.4		34.2		36.3		46.5		54.1		58.6		64		58		50.3		43.5		30.5		23.7

Most Sunshine Reported in a Day

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		15		9.6		10.8		11.6		13.6		14.8		15		15		14.2		12.8		10.7		9.8		8.9

Average Wind Speed

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		16.2		19.6		18		18.1		18.2		15.7		13.4		12.3		11.8		13.5		16.4		18.5		18.8

Highest Reported Hourly Wind Speed

Years on Record: 38

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		93		78		81		67		74		65		56		53		67		56		72		83		93

Highest Reported Wind Gust

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		159		100		117		159		109		115		87		102		87		93		106		109		124

Avg. # of Days w/Wind Above 32 mph/52 km/h

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		16.2		2.1		2.1		2.2		1.9		1.1		0.6		0.4		0.3		0.6		1		1.9		2.1

Avg. # of Days w/Wind Above 39 mph/63 km/h

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.7		0.5		0.6		0.8		0.8		0.4		0.1		0.1		0.2		0.1		0.2		0.5		0.6

Average Primary Wind Direction

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		180		270		180		180		360		360		360		360		180		180		180		180		270

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