Z?RICH - AFFOLTERN, SWITZERLAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.5		-0.6		0.8		4.2		8		12.4		15.6		17.8		16.9		13.8		9.1		3.9		0.5

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.2		2.1		4.6		8.9		13.2		18		21.1		23.7		22.9		19.6		13.8		7.1		3.1

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		4.1		-3.7		-2.7		-0.3		2.9		6.8		10		11.9		11.6		8.8		5.2		0.7		-2.2

Average Number of Days Above 86F/30C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.3		---		---		---		---		---		0.7		2.8		1.5		0.3		---		---		---

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39		---		---		---		---		2.4		7.1		14.3		11.8		3.2		0.2		---		---

Average Number of Days Below 0F/-17C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		20.9		8.5		4.5		0.6		---		---		---		---		---		---		---		1.6		5.7

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1042		69		69		68		82		100		117		105		120		86		68		83		76

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		113.3		10.1		9.1		10.5		11.6		11.8		11.6		10.9		11.6		8.3		7.8		10.1		10

Average Number of Days With Frost

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		72.7		24.1		19.8		14		3.8		0.7		---		---		---		---		1.8		13.4		19.2

Average Number of Days With Ice

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13.8		9.3		5.1		0.6		0.1		---		---		---		---		---		---		2.3		5.7

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		78.7		86		81.5		75.5		72.8		72.4		72.9		72.2		75.2		78.9		84.9		85.4		86.1

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3974		593.3		491.2		434.9		308.3		184.3		83.3		16.4		33.6		124.2		273.8		432.5		554.6

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		833.4		---		---		---		---		74.1		166.7		242		224.8		125.8		---		---		---

Average Station Pressure

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		965		967.2		965.6		964.4		961.8		963.3		965		965.6		965.3		965.7		965.3		964.8		965.5

Average Vapor Pressure

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		9.4		5.3		5.5		6.5		7.9		10.4		13		14.6		14.6		12.7		9.9		7		5.6

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.6		10.8		12.5		14.2		15.8		16.6		16.1		14.7		13		11.3		9.9		9.1

Average Monthly Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		1378		33		63		109		136		167		182		215		191		150		90		47		28

Average Possibility of Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Percent		34		13		23		31		35		38		41		48		46		42		28		18		12

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		6.1		7.2		6.8		7.6		7.2		6.1		6.1		5.8		4.7		5		5.4		6.1		6.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		4.9		7.8		11.7		15.3		18.8		20.2		20.2		17.4		12.6		7.8		4.9		3.8

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		2.9		4.1		6		7.6		9		9.5		9.2		8.1		6.2		4.1		2.9		2.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		8.5		11.7		14.2		15.7		17.2		17.5		18		17.1		14.3		10.4		7.7		6.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.2		7.4		10.3		12.2		13.8		16.4		17.5		18.1		16.2		12.7		9.4		6.6		5.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		4.9		7.8		11.7		15.3		18.8		20.2		20.2		17.4		12.6		7.8		4.9		3.8

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.3		3.2		4.8		6.5		7.7		9		9.6		9.3		8.2		6.9		4.9		3.4		2.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.3		10.2		15.4		17.9		19.6		21.9		20		20.7		19.7		19.1		13.8		9.8		7.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.5		9		14		16.4		20		24.8		22.4		23.4		20.6		18.9		13.1		8.8		7.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.4		4		5.5		9.4		11.3		16.1		15.9		17.2		14.2		8.3		5.2		3.2		2.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.5		2.5		3.3		5.6		7.3		8.8		9.3		9		8		5.4		3.2		2.2		1.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.8		6.5		7.5		10.9		11.1		14.7		14		15.3		13.7		8.7		6.4		4.3		3.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		7.5		5.4		6.3		8.3		7.2		11.8		10.6		13.1		10.6		5.8		5		3.1		3.1