RUAKURA RESEARCH CENTRE, NEW ZEALAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		56.7		64.9		65.7		63		58.1		53.1		48.9		48		49.6		52.5		55.8		59		62.2

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		66		75		75.9		73		67.8		62.1		57.6		56.7		58.3		61.2		64.4		68		71.6

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		47.5		54.9		55.4		52.9		48.6		44.1		40.5		39.2		40.8		43.9		47.1		50		52.9

Highest Recorded Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		87.8		86.4		87.8		83.3		81.3		72.9		72.1		66.4		67.1		70.3		74.1		76.8		81.3

Lowest Recorded Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		---		35.6		41.5		34.9		---		32.2		34		---		---		33.3		---		35.4		39

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
in		28.5		4.1		3.5		3.1		1.9		1.2		1		1.2		1.3		1.7		2.6		3.2		3.7

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		11.7		0.8		0.7		0.8		0.7		1.3		1.1		1.3		0.8		0.9		1		1.1		1.3

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
in		2.9		2.9		2.4		1.8		1.6		2.1		1.8		2.5		2		1.5		1.2		1.4		2.3

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		3055.4		3.1		---		62		207		368.9		483		527		477.4		375		285.2		180		86.8

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		19.8		---		19.8		---		---		---		---		---		---		---		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2550.5		461.9		443.5		403		243		96.1		---		---		---		75		179.8		270		378.2

Average Vapor Pressure

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
InHg		0.4		0.5		0.5		0.5		0.4		0.4		0.3		0.3		0.3		0.4		0.4		0.4		0.5

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
mph		5.3		5.3		5.2		4.9		4.5		4.9		4.9		5.2		5.3		5.6		6		6.3		5.8

Highest Reported Hourly Wind Speed

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		18.6		18.6		13		11.9		12.3		14		15.8		17.5		13.5		15.3		14		14.3		14

Highest Reported Wind Gust

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		53		45		40.3		46.1		41.4		41.4		53		49.5		42.5		47.2		47.2		47.8		53

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
kWh/m2		3.9		5.9		5.2		4.3		3.1		2.2		1.8		2		2.7		3.6		4.5		5.3		5.8

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		2.5		2.2		1.7		1.2		0.9		0.8		0.8		1.1		1.5		2.1		2.5		2.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.2		5.3		5.1		4.7		4.1		3.3		3		3.2		3.5		4.1		4.5		4.9		5.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.1		5.2		4.8		4.6		3.9		3.4		3.1		3.3		3.5		3.8		4		4.4		4.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		5.9		5.2		4.3		3.1		2.2		1.8		2		2.7		3.6		4.5		5.3		5.8

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		2.6		2.3		1.8		1.3		0.9		0.8		0.8		1.1		1.6		2.1		2.5		2.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5		6		5.9		6.8		4.7		4.3		3.6		4		4		4.8		5.2		5.5		5.5

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.4		6.6		6.2		8.1		4.9		4.8		3.9		4.4		4.2		4.8		5.2		5.6		5.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		5.2		4.1		3.7		2.6		1.9		1.4		1.6		2.3		3.2		3.8		4.8		5

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		2.4		2.1		1.2		1.2		0.8		0.7		0.7		1.1		1.5		2		2.4		2.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.5		4.7		3.9		3.9		3.1		2.7		2.1		2.2		2.9		3.6		3.8		4.4		4.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		3.9		2.9		3.3		2.6		2.5		1.9		2		2.6		3		2.9		3.6		3.4