VANWYKSVLEI, SOUTH AFRICA

Average Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18		27		26		22		18		13		10		10		11		15		20		23		26

Average High Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		24		32		31		28		24		20		16		16		18		22		26		29		31

Average Low Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12		21		20		17		12		7		3		2		4		9		14		18		21

Highest Recorded Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42		42		40		38		36		31		26		26		31		36		37		38		40

Lowest Recorded Temperature

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-7		11		9		1		---		-3		-7		-6		-7		-2		1		7		8

Average Number of Days Above 90F/32C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		77		19		16		9		1		---		---		---		---		2		4		10		16

Average Number of Days Above 80F/26C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		161		28		24		22		12		3		---		---		2		7		15		23		26

Average Number of Days Below 45F/7C

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		112		---		---		---		4		19		25		26		24		12		2		---		---

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		23		---		---		---		---		1		6		10		5		1		---		---		---

Average Precipitation

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		170		10		20		40		20		10		---		---		---		---		10		10		10

Average Number of Days With Thunderstorms

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10		1		2		2		1		---		---		---		1		---		1		1		1

Most Rain Reported in a Month

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		420		100		110		230		100		50		20		40		60		60		40		90		50

Average Evening Relative Humidity

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		31		25		30		33		35		37		39		36		32		28		25		23		24

Average Dew Point

Years on Record: 6

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5		8		10		9		7		3		1		---		---		2		3		5		7

Heating Degree Days

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		936.7		---		---		---		---		146.4		241.7		266.9		206.7		75		---		---		---

Cooling Degree Days

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1269.8		266.9		204.1		137.8		---		---		---		---		---		---		60.3		166.7		241.1

Growing Degree Days

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3592		525.3		439.4		396.1		250		111.9		8.3		---		51.7		175		318.6		416.7		499.4

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		14.3		13.5		12.6		11.7		11		10.7		10.8		11.5		12.3		13.3		14.1		14.5

Average Number of Days With Fog

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3		---		---		---		---		1		1		1		---		---		---		---		---

Average Wind Speed

Years on Record: 6

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		17		17		17		16		16		17		17		19		19		17		19		20		19

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21		28.7		24.8		21.2		17.3		14.4		12.8		13.7		17.1		20.8		24.4		27.6		29.4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		7.1		6.9		5.7		4.1		2.8		2.3		2.5		3		4.4		5.9		6.9		7.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.8		25.5		23.9		22.7		21.4		20		19.4		20		22.8		23.6		24.2		25		25.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		27.2		31.6		26.9		25		24		24.5		24.2		24.9		27		27.3		28.1		30.4		32.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21		28.7		24.8		21.2		17.3		14.4		12.8		13.7		17.1		20.8		24.4		27.6		29.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.9		8.3		7.8		6.5		5.3		3.6		2.9		3.4		4.2		5.7		7		8.1		8.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		25.2		28.5		26.2		24.7		24.8		22		21.9		22.1		24.6		26.2		26.7		27.6		27.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		32.1		39.6		32		28.9		29.9		28.1		28.6		28.6		30.1		32.2		33.6		36.9		37.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.3		25.6		22.1		18.4		13.8		12.7		11.6		11.6		14.3		17.5		22		24.7		25.7

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		5.3		5.9		4.9		3.1		2.2		1.7		1.9		2.5		3.4		4.8		5.5		6.2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		22.9		21.3		19.4		16.2		17.1		16.9		16.2		18.3		19.4		21.6		22.5		22.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.8		25.3		21.5		19		15.4		19.4		20		18.4		19.5		19.7		22.9		24.5		24.9