WILLIAMSTOWN, SOUTH AUSTRALIA

Average Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		19		19		17		13		10		8		7		8		9		12		14		17

Average High Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		19.9		27.2		27.7		24.3		20.7		16		13		12.3		13.3		15.5		19.2		21.9		25

Average Low Temperature

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.9		11.3		11.4		9.7		7		4.6		3.6		3.1		3.3		4.2		6.1		7.7		9.6

Highest Recorded Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42.5		42.5		42.5		40.6		34		26.4		22		23.5		25		27.5		32		39		40

Lowest Recorded Temperature

Years on Record: 25

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-7		2		1		-2.2		-3.5		-5		-7		-7		-4.7		-4		-3.5		-2		0.1

Average Morning Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.7		19.3		18.8		17.5		14.7		10.5		7.7		7.3		8.7		11		14		15.3		17.9

Average Afternoon Temperature

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		19.5		26.1		26.3		22.8		19.9		15.2		12.2		11.4		12.3		14.1		18		20.6		23.6

Average Number of Days Above 104F/40C

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.1		0.6		0.3		---		---		---		---		---		---		---		---		---		0.1

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		10.4		4.1		3.6		0.8		---		---		---		---		---		---		---		0.3		1.7

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		37.9		10.1		10.6		5.2		1.1		---		---		---		---		---		0.5		3.1		7.3

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		62.3		0.1		0.1		1		4		9		10.2		10.8		10.2		8.7		5.3		2.1		0.8

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		29.5		---		---		0.1		1		4.1		5.7		6.4		5.9		4.1		1.6		0.6		---

Average Precipitation

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		750		20		20		20		50		80		90		110		100		80		60		30		30

Average Number of Rainy Days

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		139.4		5.7		4.8		6.4		9.9		14.4		15.9		18.8		19.1		15		12.7		8.8		7.9

Most Rain Reported in a Day

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		100		40		100		60		40		50		50		40		70		30		60		40		40

Most Rain Reported in a Month

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		260		70		130		100		150		240		240		260		200		200		170		100		160

Least Rain Reported in a Month

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		---		---		---		10		10		30		20		20		---		---		---

Average Morning Relative Humidity

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		71		56		58		62		70		84		89		89		84		76		64		61		57

Average Evening Relative Humidity

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		52		33		32		41		47		64		74		73		68		62		53		43		38

Average Morning Dew Point

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8		10.4		10.2		10.2		9.1		7.6		6		5.1		5.8		6.6		7		7.9		9.1

Average Afternoon Dew Point

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7.6		8.6		8.2		9.4		7.9		7.7		7.2		6.5		5.8		6.4		6.8		7.1		8

Average Morning Web Bulb

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.8		14.5		14.2		13.6		11.9		9.1		7.1		6.3		7.2		8.9		10.6		11.7		13.2

Average Afternoon Wet Bulb

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.4		16.6		16.8		15.5		13.7		11.5		9.5		9.1		8.9		10.5		12.9		13.8		15.2

Heating Degree Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2057.8		---		---		51.7		141.7		258.3		308.3		335.8		327.2		266.7		189.4		116.7		34.4

Cooling Degree Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40.8		17.2		23.6		---		---		---		---		---		---		---		---		---		---

Growing Degree Days

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1454.7		275.6		258.9		206.7		108.3		---		---		---		---		---		68.9		133.3		223.9

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		14.6		13.8		12.7		11.6		10.8		10.3		10.5		11.3		12.3		13.4		14.4		14.9

Average Number of Clear Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		92.4		13.2		13.5		11.4		8		5.3		4.3		4.3		4.4		4.7		6.2		7.2		9.9

Average Number of Cloudy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		106.4		6		5.2		6.9		8.8		10		10.9		12.2		11.9		10.2		8.4		8		7.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.2		26.1		23.4		19.3		14.1		9.9		8.2		9		11.6		15.7		20.2		23.7		25.1

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		8.1		7		5.6		4.3		3.4		2.9		3.1		4.1		5.4		6.9		8.2		8.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.5		23.3		22.8		21.1		18.2		14.2		12.8		13.5		15		18		20.2		21.6		21.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.1		27		25.4		23		19.2		15.2		13.8		14.6		15.8		18.2		21.1		23.4		24.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.2		26.1		23.4		19.3		14.1		9.9		8.2		9		11.6		15.7		20.2		23.7		25.1

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.2		8.5		7.8		6.4		4.8		3.6		3.1		3.3		4.3		5.9		7.6		8.8		9.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.3		25.9		26.6		25.3		20.8		15.6		16.3		16.3		17.1		20.3		22.4		23.9		24.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		25.2		33.7		33.7		30.8		23.4		17.4		19		18.9		19.1		21.9		25.4		28.6		31.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.1		24.9		20.7		16.6		12.1		8.5		7.5		7.8		10.5		13.9		17.1		21.2		19.8

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		6.8		5.5		4.2		3.7		3.2		2.5		2.7		3.7		5		6.3		7.3		7.7

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16		22.2		20.1		17.9		14.9		11.7		11.3		11.2		13.2		15.6		16.8		19.4		17.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		24.6		20		17.3		14.2		11.5		11.6		11.2		13.1		14.3		15.1		18.8		15