CHATHAM, ONTARIO

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Elevation: 198 meters Latitude: 42 18N Longitude: 082 05W

WEATHER

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CURRENT CONDITIONS

Sunrise/Set

06:04 am

08:45 pm
Local Time
3:46 am EDT
17 May, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		-3		-4		1		7		13		19		22		21		17		10		3		-2

Average High Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14		---		---		5		13		20		26		28		27		23		16		7		1

Average Low Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-7		-8		-3		2		7		13		16		15		11		5		---		-5

Highest Recorded Temperature

Years on Record: 70

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		41		17		17		26		32		36		37		40		41		36		32		26		16

Lowest Recorded Temperature

Years on Record: 70

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-28		-27		-28		-20		-13		-3		---		2		3		-1		-6		-14		-23

Average Number of Days Above 95F/35C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.6		---		---		---		---		---		0.1		0.4		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		16.2		---		---		---		---		1.2		4.8		6.2		3.3		0.7		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		131.7		---		---		0.9		3.8		14.9		26		30.6		29.8		20.1		5.3		0.3		---

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		220.2		1		1.4		7.2		19.8		30.3		30		31		31		29.9		26.7		10.2		1.7

Average Number of Days Above 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		319.3		15.1		15.9		25.4		29.9		31		30		31		31		30		31		28.4		20.5

Average Number of Days Below 35F/2C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		148.4		29.7		26.8		25.7		12.8		1.1		0.1		---		---		0.2		4.8		18.6		28.8

Average Number of Days Below 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		120.7		27.2		24.4		22.1		7.8		0.1		---		---		---		---		1.6		12.4		25.2

Average Number of Days Below 28F/-2C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		81.9		22.8		19.2		14.2		2.8		0.1		---		---		---		---		0.1		6		16.8

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24.4		9.6		7.1		2		---		---		---		---		---		---		---		---		5.8

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		1		---		---		---		---		---		---		---		---		---		---		---		---

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.5		0.9		0.2		---		---		---		---		---		---		---		---		---		0.4

PRECIPITATION

Average Precipitation

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		740		50		50		50		50		70		60		70		60		60		60		50		50

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		139.2		12.6		9.4		10.8		14.5		12.5		11.3		10.3		9.8		10.8		12.1		12.5		12.8

Most Precipitation Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		86.1		33.8		49.2		34.6		50		43.2		66.4		86.1		67.2		84.8		56.8		32		34.2

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53.4		3.9		3.4		4.2		5.4		4.6		4.8		4.4		4.6		4.9		3.9		5.1		4.1

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27.8		1.7		1.6		1.7		2.6		2.3		2.9		2.6		2.9		2.9		2.2		2.6		2

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.9		0.1		0.3		0.2		0.2		0.6		0.6		0.8		0.9		0.8		0.5		0.4		0.3

PRECIPITATION - RAIN

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		807.6		30		35.3		49.5		76.8		74.5		83.4		86.1		86.3		92.6		68.6		72.9		51.7

Average Number of Rainy Days

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		76		6		6		6		6		7		6		6		5		6		5		5		6

Most Rain Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		86		34		49		35		50		43		66		86		67		85		57		32		34

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48.1		1.9		1.9		3.4		5.4		4.6		4.8		4.4		4.6		4.9		3.9		5		3.2

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25.9		1		1.1		1.4		2.5		2.3		2.9		2.6		2.9		2.9		2.2		2.6		1.7

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.9		0.1		0.3		0.2		0.2		0.6		0.6		0.8		0.9		0.8		0.5		0.4		0.3

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 60

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		107		27		25		18		5		---		---		---		---		---		---		7		22

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.4		7.6		4.7		3.2		0.9		---		---		---		---		---		0.1		0.8		5.1

Deepest Snow Cover Reported

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		44		44		40		25		3		---		---		---		---		---		---		7		13

Most Snow Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		22		22		20		15		4		---		---		---		---		---		1		5.2		15

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.8		1.9		1.4		0.6		---		---		---		---		---		---		---		0.1		0.8

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

Years on Record: 30

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

HUMIDITY

Average Relative Humidity

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		69		75		73		69		65		62		64		64		68		69		69		72		75

Average Dew Point

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-7		-6		-4		1		6		12		15		15		11		6		---		-5

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1926.6		373.3		321.3		276.3		164.8		67.1		13.3		1.5		3.1		32.3		118.4		220		335.3

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		235.6		---		---		0.1		1.4		14		50.8		78.6		62.4		26.3		2.1		---		---

Growing Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1394.9		---		---		---		---		120.6		283.3		378.9		344.4		233.3		34.4		---		---

SKY CONDITIONS

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		15.4		14.3		12.9		11.5		10.3		9.7

WIND

Highest Reported Hourly Wind Speed

Years on Record: 30

		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

SOLAR RADIATION

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

NEARBY - MAP

NEARBY - LIST

Chatham - Riverfront, Ontario (9 mi / 14 km)
Ridgetown, Ontario (14 mi / 23 km)
Dresden, Ontario (20 mi / 32 km)
Wallaceburg, Ontario (25 mi / 40 km)
New Glasgow, Ontario (26 mi / 43 km)

GEOBA.SE

Chatham, Ontario