PERTH, WESTERN AUSTRALIA

Average Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		65		76		76		73		66		61		57		55		56		58		61		66		71

Average High Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		75		89		89		85		77		70		66		64		65		68		72		78		83

Average Low Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		53		62		63		60		55		50		48		46		46		48		50		54		58

Highest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		116		115		116		108		100		93		82		77		83		89		100		105		108

Lowest Recorded Temperature

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		30		43		42		42		34		31		30		32		32		32		36		38		41

Average Number of Days Above 90F/32C

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		50		14		13		9		2		---		---		---		---		---		1		3		8

Average Number of Days Above 70F/21C

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		227		31		28		31		27		16		5		2		4		10		17		26		30

Average Precipitation

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		31.5		0.3		0.5		0.6		1.8		4.2		6.9		6.4		4.6		2.7		1.9		1		0.5

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		115		5		4		5		7		12		15		17		15		15		9		7		4

Average Number of Days With Thunderstorms

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		16		1		1		1		1		2		2		2		2		1		1		1		1

Most Rain Reported in a Month

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		45.8		2.9		4.8		2.4		4.5		9		16.7		17.6		13.4		6.4		4.9		3.2		2.6

Least Recorded Rainfall

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		20.6		---		---		---		---		0.6		2.6		2.5		0.9		0.4		---		---		---

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		64.6		50		50		55		65		70		75		80		75		75		65		60		55

Average Morning Relative Humidity

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		81		71		70		73		79		85		87		88		88		87		84		78		75

Average Evening Relative Humidity

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		50		39		38		40		48		55		62		62		58		55		51		46		43

Average Dew Point

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		51		55		55		54		52		50		49		48		47		48		49		51		53

Heating Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1333.5		---		---		---		---		155		240		310		294.5		210		124		---		---

Cooling Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1099.3		325.5		310.8		232.5		30		---		---		---		---		---		---		30		170.5

Growing Degree Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5244.5		790.5		734.5		697.5		480		310		210		155		170.5		240		341		480		635.5

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		14.4		13.6		12.7		11.7		10.9		10.5		10.7		11.4		12.3		13.3		14.2		14.7

Average Daily Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		9.5		13		11		11		9		8		7		7		8		7		10		11		12

Average Number of Days With Fog

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40		1		1		2		3		5		5		5		4		5		5		3		1

Average Wind Speed

Years on Record: 38

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		10		13		13		12		11		6		6		6		5		10		11		12		12

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		7.7		6.8		5.5		4.2		3.1		2.6		2.8		3.6		4.7		6.2		7.2		7.8

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		2.1		1.9		1.6		1.3		1		0.9		1		1.2		1.5		1.8		2.1		2.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		6.8		6.6		6		5.1		4.2		3.9		4		4.5		5.3		6.1		6.5		6.8

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.1		8.3		7.5		6.4		5.4		4.6		4.2		4.3		4.7		5.4		6.7		7.5		8.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		7.7		6.8		5.5		4.2		3.1		2.6		2.8		3.6		4.7		6.2		7.2		7.8

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		2.5		2.1		1.8		1.4		1.1		0.9		1		1.3		1.7		2		2.4		2.4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.2		7.5		7.3		6.7		6.2		5.4		4.9		4.4		4.9		6.1		6.6		7		7.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		7.4		10		9.1		7.9		7.1		6.5		5.8		5		5.5		6.8		7.6		8.6		9.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		6.3		6.2		5.1		3.8		2.6		2.4		2.5		3.1		4.2		5.6		6.4		7.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.3		1.7		1.6		1.4		1		0.8		0.7		0.9		1.1		1.3		1.7		1.9		1.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.8		5.7		6		5.4		4.5		3.3		3.4		3.3		3.8		4.7		5.6		5.9		6.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.9		5.7		6.2		5.5		4.4		3.2		3.5		3.3		3.7		4.4		5.6		6.1		7