RUAKURA RESEARCH CENTRE, NEW ZEALAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.7		18.3		18.7		17.2		14.5		11.7		9.4		8.9		9.8		11.4		13.2		15		16.8

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18.9		23.9		24.4		22.8		19.9		16.7		14.2		13.7		14.6		16.2		18		20		22

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.6		12.7		13		11.6		9.2		6.7		4.7		4		4.9		6.6		8.4		10		11.6

Highest Recorded Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		31		30.2		31		28.5		27.4		22.7		22.3		19.1		19.5		21.3		23.4		24.9		27.4

Lowest Recorded Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		---		2		5.3		1.6		---		0.1		1.1		---		---		0.7		---		1.9		3.9

Average Number of Days Above 80F/26C

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28.6		9.9		10.9		5.7		0.3		---		---		---		---		---		---		---		1.8

Average Evaporation Rate

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		723.5		104.7		89.7		79.5		47.6		31.2		25		29.5		32.6		42.7		64.9		81.6		94.5

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		297.8		19.1		17.3		19.8		18.7		32.5		28.3		32.2		20.4		23.6		25.1		28.1		32.8

Average Number of Rainy Days

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		166.3		11.2		8.6		10.1		12.3		15.4		16.5		16.1		16.5		15.8		15.2		14.1		14.5

Most Rain Reported in a Day

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		73.4		73.4		60.8		46		41.4		53.4		45		63.2		49.6		39.2		30.4		35.8		57.2

Avg. No. of Days w/Rain Above 0.1in/2mm

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		120.9		7.8		5.5		7.4		8.2		11.3		12		11.9		11.9		10.5		11.6		11.2		11.6

Average Number of Days With Frost

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		16.6		---		---		---		0.3		0.3		4.3		5.8		4.9		0.8		0.2		---		---

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		86.1		81.9		85		86.1		87.1		91.2		92.5		91.9		89.3		84.8		83.8		79		80.4

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1708.1		---		---		34.1		117.8		204.6		275.9		291.4		263.5		213.9		158.1		102.3		46.5

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.3		---		11.3		---		---		---		---		---		---		---		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1416		257.3		245.8		223.2		135		52.7		---		---		---		42		99.2		150		210.8

Average Vapor Pressure

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		13.4		16.7		17.1		15.8		13.9		12.9		10.6		9.9		10.3		11.9		12.8		13.5		15.6

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		14.9		13.9		12.7		11.5		10.6		10.1		10.3		11.2		12.3		13.5		14.7		14.9

Average Wind Speed

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		8.6		8.6		8.3		7.9		7.2		7.9		7.9		8.3		8.6		9		9.7		10.1		9.4

Highest Reported Hourly Wind Speed

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		29.9		29.9		21		19.2		19.8		22.5		25.5		28.1		21.8		24.7		22.6		23		22.5

Highest Reported Wind Gust

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		85.3		72.4		64.8		74.2		66.6		66.6		85.3		79.6		68.4		76		76		77		85.3

Avg. # of Days w/Wind Above 32 mph/52 km/h

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59.3		4.4		3.3		2.1		2.9		4		4.8		4.3		5.5		5.7		8.6		7.5		6.2

Avg. # of Days w/Wind Above 39 mph/63 km/h

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.5		0.5		0.1		0.1		0.2		0.5		0.7		0.7		0.3		0.7		0.5		0.5		0.7

Average Primary Wind Direction

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		206		152.5		182.1		190.7		209.3		190.5		193.3		219.3		204.2		218.6		197.1		225.2		289.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14		21.4		18.8		15.6		11.3		8.1		6.5		7.3		9.5		12.9		16.1		19.2		20.8

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6		9.1		7.9		6.1		4.5		3.2		2.7		2.9		4		5.5		7.4		8.9		9.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.2		19.2		18.2		17.1		14.6		12		10.8		11.6		12.6		14.8		16.1		17.6		18.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.6		18.7		17.2		16.6		14.2		12.3		11.1		12		12.5		13.6		14.2		15.9		17

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14		21.4		18.8		15.6		11.3		8.1		6.5		7.3		9.5		12.9		16.1		19.2		20.8

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.1		9.4		8.1		6.4		4.6		3.4		2.8		3		4.1		5.7		7.5		9		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		18.1		21.6		21.1		24.3		17		15.4		13		14.4		14.4		17.2		18.8		19.8		19.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.3		23.8		22.4		29.3		17.7		17.3		14.2		15.9		15.2		17.2		18.6		20.1		20.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.8		18.6		14.7		13.3		9.2		6.8		5.2		5.7		8.2		11.5		13.8		17.4		17.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		8.6		7.4		4.4		4.2		2.8		2.5		2.7		3.8		5.3		7.1		8.6		9.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.5		16.8		14.2		14.2		11.2		9.5		7.7		8		10.4		12.9		13.7		16		15.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.4		14.1		10.5		12		9.4		8.9		7		7.2		9.3		10.8		10.4		13		12.3