GROOTFONTEIN, NAMIBIA

Average Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		21		24		23		22		21		17		15		14		17		22		24		25		25

Average High Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		27		28		27		27		26		25		22		22		25		29		30		30		30

Average Low Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15		20		19		17		15		10		7		6		10		15		18		19		20

Highest Recorded Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		37		36		37		35		36		31		28		29		33		37		36		37		37

Lowest Recorded Temperature

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-3		12		13		8		8		2		-3		-1		-1		3		8		10		12

Average Number of Days Above 95F/35C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7		1		1		---		---		---		---		---		---		---		1		2		2

Average Number of Days Above 86F/30C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		127		16		10		8		4		1		---		---		3		18		23		22		22

Average Number of Days Below 75F/23C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		358		29		27		31		29		31		30		31		31		30		30		29		30

Average Number of Days Below 65F/18C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		251		8		12		21		28		30		29		31		31		26		17		11		8

Average Precipitation

Years on Record: 93

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		550		120		120		90		40		---		---		---		---		---		10		50		80

Average Number of Days With Thunderstorms

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48		10		8		7		3		---		---		---		---		1		4		7		8

Most Rain Reported in a Month

Years on Record: 93

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		990		380		360		330		190		50		30		140		30		50		70		280		230

Least Recorded Rainfall

Years on Record: 93

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		190		---		---		10		---		---		---		---		---		---		---		---		---

Average Morning Relative Humidity

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		62		72		79		81		77		69		67		62		49		40		44		52		59

Average Evening Relative Humidity

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		33		45		52		45		38		30		26		25		21		20		26		32		37

Average Dew Point

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7		14		15		14		11		5		1		---		---		2		6		10		12

Heating Degree Days

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		254.6		---		---		---		---		17.2		108.3		111.9		17.2		---		---		---		---

Cooling Degree Days

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1436.3		189.4		149.1		129.2		75		---		---		---		---		116.7		189.4		200		215.3

Growing Degree Days

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4432.1		447.8		384.5		387.5		325		241.1		141.7		146.4		241.1		366.7		447.8		450		473.6

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		13.5		13.1		12.6		12		11.6		11.4		11.5		11.9		12.4		12.9		13.4		13.7

Average Number of Days With Fog

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5		1		1		1		1		1		---		---		---		---		---		---		---

Average Wind Speed

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		14		14		16		16		14		14		14		14		14		14		14		14		14

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22		23.5		22.3		21.4		20.4		19.8		18.5		19.2		22		24.2		24.1		23.7		24.4

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		8.6		8.1		6.8		4.8		2.7		2.1		2.3		2.8		4.5		6.9		8.3		8.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23.5		23.2		21.2		21.7		22.6		24.4		23		24.4		25.9		25.6		23.3		21.9		24.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		26.2		21.2		20.4		21.7		25.1		30.7		31.4		31.4		32.3		30		24.8		22		23

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22		23.5		22.3		21.4		20.4		19.8		18.5		19.2		22		24.2		24.1		23.7		24.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.3		9.2		8.7		7.5		6.1		3.4		3.4		2.8		3.5		5.5		7.6		8.9		9.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		25.8		26.4		23.9		24.2		26.6		26.5		24.1		25.3		26.8		27.3		25.9		24.8		27.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		30.7		27		25.9		26.4		32.6		34.7		33.7		33.2		34		33.6		30.3		28.6		29.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		20.9		19.5		18.9		16.9		18.6		16.2		18.3		21		22		21.9		21.1		19.7

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.7		7.7		7.2		6		3.3		1.9		1.7		1.9		2.5		3.7		5.8		7.2		7.3

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.8		20.7		18.5		19		18.4		22.7		19.7		23.1		24.5		23.1		21.2		19.7		19.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.3		16.9		15.5		17		17.5		27.3		24.6		28.8		29.6		25.1		20.7		17.5		14.9