YELLOWKNIFE - HYDRO STATION, NORTHWEST TERRITORIES

Average Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-5.9		-27		-25		-17.7		-6.6		3.3		11.8		15.1		13		5.8		-2.7		-15.6		-24.8

Average High Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-0.5		-22.3		-19.4		-10.3		0.2		9.5		18		21.1		18.5		10.3		0.2		-11.5		-20.2

Average Low Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-11.2		-31.6		-30.7		-25.1		-13.5		-2.9		5.6		9.2		7.5		1.4		-5.5		-19.6		-29.5

Highest Recorded Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		32.2		2.8		6.7		12.8		21		25.6		30.6		32.2		31.5		26.7		17.2		7.2		1.7

Lowest Recorded Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-53.9		-53.9		-53.9		-46.7		-43.3		-26.1		-6.1		-1.1		-3.9		-13.3		-27.5		-45.6		-47.2

Average Number of Days Above 95F/35C

Years on Record: 17

ANNUAL

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Days

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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		0.4		---		---		---		---		---		---		0.3		0.1		---		---		---		---

Average Number of Days Above 86F/30C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.5		---		---		---		---		---		---		0.3		0.2		---		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42		---		---		---		---		1.3		10.7		17.7		11.2		1.1		---		---		---

Average Number of Days Above 50F/10C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116.4		---		---		---		1.2		13.7		27.6		30.9		28.3		14.3		0.4		---		---

Average Number of Days Above 32F/0C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		184		0.2		---		2.1		14.7		28.9		29.9		31		31		29.1		16.3		0.8		---

Average Number of Days Below 35F/2C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		267		31		28.3		31		30		26.8		6.8		0.4		4.2		17.4		30.1		30		31

Average Number of Days Below 32F/0C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		249.3		31		28.3		31		29.7		24		3		0.1		1.9		12.6		26.9		29.8		31

Average Number of Days Below 28F/-2C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		222		31		28.3		30.9		28.1		16.5		0.9		---		0.1		5.1		20.6		29.5		31

Average Number of Days Below 10F/-12C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		169.4		30.8		28		29.3		17.4		2.2		---		---		---		0.1		5.4		25.2		31

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116.8		27.3		23.1		20.7		5.6		---		---		---		---		---		0.8		13.8		25.4

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62.3		16.5		15.3		10.2		1.4		---		---		---		---		---		---		4.3		14.6

Average Precipitation

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		307.7		15.2		18.8		15		10.8		18.2		34.4		40.1		41.4		37.3		30.1		25.4		21

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		107.2		9.2		8.9		7.4		4.4		6.2		7.4		9		10.6		8.9		11.3		13.1		11

Most Precipitation Reported in a Day

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		42.7		12.5		14		20.3		15.2		21.3		38.6		40		32.8		32.2		42.7		21.5		21.6

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		103.6		8		9		6.8		3.7		5.7		8.2		9.7		11.1		8.9		10.6		12		9.9

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17.9		0.5		0.9		0.9		0.8		1.3		2.2		2.5		2.4		2.8		1.6		1.3		0.8

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.8		0.1		0.1		0.1		0.1		0.3		0.8		1		1.5		0.8		0.6		0.3		0.2

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.5		---		---		---		---		---		0.1		0.1		0.2		0.1		---		---		---

Average Rainfall

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		184.4		---		---		0.2		2		15		34.2		40.1		41.4		36.1		15.2		0.2		---

Average Number of Rainy Days

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		47.3		---		---		0.1		0.3		4.3		8.1		9.7		11.1		8.8		4.9		0.1		---

Most Rain Reported in a Day

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		40		---		---		6.4		14		21.3		38.6		40		32.8		32.2		36.3		7.1		---

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		---		---		---		0.2		1.1		2.2		2.5		2.4		2.7		0.8		---		---

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.6		---		---		---		0.1		0.3		0.8		1		1.5		0.7		0.3		---		---

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.5		---		---		---		---		---		0.1		0.1		0.2		0.1		---		---		---

Average Snowfall

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		123.3		15.2		18.8		14.8		8.8		3.2		0.2		---		---		1.3		14.9		25.2		21

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62		9.2		8.9		7.3		3.6		1.6		---		---		---		0.6		6.8		13		11

Deepest Snow Cover Reported

Years on Record: 1

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

Most Snow Reported in a Day

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		28.2		12.5		14		20.3		15.2		14.7		5.1		---		---		17		28.2		21.5		21.6

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		56.9		8		9		6.7		3.4		1.6		0.1		---		---		0.1		6.1		11.9		9.9

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.9		0.5		0.9		0.9		0.6		0.2		---		---		---		0.1		0.7		1.3		0.8

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

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.1		0.1		0.1		0.1		---		---		---		---		---		0.1		0.3		0.3		0.2

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

Years on Record: 17

ANNUAL

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Days

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Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4816.6		780.3		682.3		626.4		410.3		241.5		100.5		50.7		91.4		198.5		347.6		544.1		742.9

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.9		---		---		---		---		---		1.1		5.6		2.2		---		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		316.7		---		---		---		---		---		60		167.1		89.6		---		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13.6		7.2		9.7		12.7		15.9		19.7		22.3		20.4		16.9		13.6		10.6		7.8		6.2

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.1		0.7		3		7.7		14.7		20.7		22.9		20.9		15.2		9.2		4.3		1.3		0.2

Average 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		0.5		2		4.5		7		8.9		10		9.4		7.9		5		2.7		0.9		0.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.7		2.5		6.5		12.6		19.1		20.3		19.6		18.7		15.6		12.3		8.5		3.8		1

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		2.2		5.9		11		18.9		25.7		27.4		24.6		16.7		12.2		7.4		3.5		---

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.1		0.7		3		7.7		14.7		20.7		22.9		20.9		15.2		9.2		4.3		1.3		0.2

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		0.6		2.3		4.7		7.1		9		10.1		9.5		8		5.3		3		1		0.2

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		3.2		8.2		14.4		21.4		23.8		21.9		21.4		18.8		14		9.8		4.8		1.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		---		2.8		7.7		13.1		22.1		32.8		33.2		30.9		22.2		14.4		8.6		4.3		---

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.8		0.6		2.6		6.6		13		17.6		20.2		18.4		13.6		8.2		3.6		1.1		0.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.8		0.5		1.8		4.1		6.9		8.5		9.9		9.2		7.9		4.8		2.4		0.8		0.2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.9		2		5.4		10.2		16.3		16.4		17.2		16.2		13.7		10.6		6.8		3.4		0.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		---		1.7		4.7		8.4		14.8		18.8		21.5		19		13.2		10		5.7		3.1		---