TOKYO, JAPAN

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		61.3		43		43.7		48.9		58.3		66		71.8		78.4		81.3		74.8		65.3		55.9		47.7

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		68		49.8		50.7		55.9		65.8		73		77.9		84.9		88		81		71.2		62.4		54.3

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		55.4		36.5		37.2		42.1		51.3		59.7		66.4		73.4		76.1		70		59.7		49.8		41.2

Highest Recorded Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		99		66		73		72		81		84		91		95		97		99		88		79		73

Lowest Recorded Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		23		25		23		25		32		45		54		55		63		55		43		32		27

Average Number of Days Above 90F/32C

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		---		---		---		---		---		---		5		10		2		---		---		---

Average Number of Days Above 70F/21C

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		166		---		---		1		8		22		27		30		31		28		16		3		---

Average Number of Days Below 32F/0C

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		21		10		7		1		---		---		---		---		---		---		---		---		2

Average Precipitation

Years on Record: 115

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		60.2		2		2.8		4.2		5.1		5.7		6.9		5.3		5.8		8.5		7.6		3.8		2.1

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		184		9		11		17		16		16		20		20		17		20		17		12		9

Average Number of Days With Thunderstorms

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		---		---		1		2		2		2		2		3		2		1		1		1

Most Rain Reported in a Month

Years on Record: 115

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		87.8		5.7		8.9		8.7		8.3		15.7		25.6		26.5		16.5		26.4		21.3		10.6		7.4

Least Recorded Rainfall

Years on Record: 115

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		34.7		---		0.1		0.4		1.1		1.9		1.3		0.4		0.4		0.2		0.8		0.2		---

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		62		49		50		55		60		65		72		73		71		71		66		59		52

Average Morning Relative Humidity

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		76		61		63		69		76		79		87		89		87		85		78		72		65

Average Evening Relative Humidity

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		60		46		49		55		60		61		71		72		68		69		64		58		50

Average Dew Point

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		49		25		26		34		46		54		64		70		72		66		54		43		32

Heating Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3066.6		728.5		635.6		542.5		240		---		---		---		---		---		46.5		300		573.5

Cooling Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1287		---		---		---		---		---		180		356.5		480.5		270		---		---		---

Growing Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4360.5		---		---		---		210		465		630		821.5		945.5		720		418.5		150		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.5		11.4		12.4		13.6		14.5		15		14.8		13.9		12.8		11.7		10.8		10.3

Average Monthly Sunshine

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		1881.3		187.9		167.3		163.1		175.4		172.5		123.2		143.9		175.3		117.8		133.4		146.6		175

Average Number of Days With Fog

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		200		11		10		14		15		20		19		22		21		19		18		18		13

Average Wind Speed

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		12		11		12		12		12		13		13		12		13		10		11		11		11

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		2.7		3.5		4.1		4.9		5		4.3		4.3		4.4		3.3		3		2.6		2.5

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		0.8		1.1		1.6		2		2.4		2.5		2.4		2.2		1.8		1.4		1		0.7

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		4.3		4.6		4.8		4.9		4.5		3.8		3.9		4.2		3.5		3.7		3.7		4.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		4.8		5		4.6		4.6		3.9		2.7		2.9		3.5		2.7		3.3		3.9		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		3.7		2.7		3.5		4.1		4.9		5		4.3		4.3		4.4		3.3		3		2.6		2.5

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		0.9		1.3		1.7		2.1		2.4		2.5		2.5		2.2		1.8		1.4		1		0.8

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.9		5		5.4		5.4		5.9		4.9		4.5		5.1		5		4.2		4.6		4.3		4.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.1		5.9		6.3		5.5		6.4		4.6		3.7		4.9		4.8		3.7		4.6		4.8		5.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		2.4		2.8		3.5		4		4.3		3.5		2.8		3.2		2.1		2.4		2		2.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.7		1		1.5		1.8		2.4		2.4		2.1		2.1		1.5		1.3		0.9		0.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		3.6		3.4		3.8		4		4		3.2		2.6		3		2.1		2.7		2.7		3.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.5		3.8		3.2		3.2		3		2.9		1.8		1.1		1.7		1.1		2		2.4		3.6