RICHMOND, ENGLAND

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11		4.8		4.9		7.4		9.5		12.9		15.9		18.2		17.9		15.1		11.5		7.6		5.2

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.1		7.9		8.3		11.3		14.1		17.7		20.8		23.2		22.9		19.7		15.4		11		8.2

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.8		1.7		1.5		3.4		4.8		8		10.9		13.2		12.9		10.5		7.6		4.1		2.1

Highest Recorded Temperature

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		32		16		17		19		22		28		32		31		31		30		27		18		15

Lowest Recorded Temperature

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-17		-12		-11		-12		-6		-1		2		6		3		1		-4		-7		-17

Average Number of Days Above 70F/21C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		65		---		---		---		1		5		11		19		19		9		1		---		---

Average Number of Days Above 60F/15C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		155		---		---		2		7		17		26		30		31		27		12		2		---

Average Number of Days Below 32F/0C

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		41		10		9		6		2		---		---		---		---		---		1		5		7

Average Number of Days With Precipitation

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		226		21		18		21		18		19		19		18		17		17		19		20		19

Average Rainfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		639.8		58.2		43.4		45.5		45.8		56		47.5		45.3		51.3		50.6		72.2		64.9		59

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		114.2		11.4		9.2		10		9.3		9.2		8.6		8		8.2		8.3		10.8		10.7		10.5

Average Number of Days With Thunderstorms

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13		---		---		---		1		2		3		2		3		1		1		---		---

Average Number of Days With Snow

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13		4		5		2		1		---		---		---		---		---		---		---		1

Average Number of Days With Frost

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		44.7		9.7		10		5.4		2.5		0.2		---		---		---		---		1.3		5.6		9.9

Average Morning Relative Humidity

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		88		88		88		87		87		86		85		86		89		91		91		90		89

Average Evening Relative Humidity

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		65		77		72		65		58		58		57		56		56		62		70		76		80

Average Dew Point

Years on Record: 16

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6		2		1		2		3		6		10		12		11		10		7		5		3

Heating Degree Days

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3128.7		421.9		384.5		353.1		283.3		180.8		83.3		17.2		25.8		108.3		232.5		325		396.1

Growing Degree Days

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		885.3		---		---		---		---		77.5		166.7		241.1		232.5		141.7		25.8		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.9		9.1		10.6		12.5		14.5		16.4		17.4		16.8		15.1		13.2		11.2		9.5		8.6

Average Number of Days With Fog

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110		9		7		7		7		8		8		6		9		12		13		12		12

Average Number of Days With Smoke/Haze

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		175		13		15		16		15		16		15		13		12		14		15		16		15

Average No. of Days With Vision Obstruction

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		204		16		17		17		17		18		16		15		15		18		19		18		18

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		13.5		15.6		15.2		15.2		13.9		13.7		12.8		12.6		11.7		11.9		12.8		12.6		13.9

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.8		2.6		4.9		8.6		13		16.8		17.6		17.4		15.2		10.3		6		3.4		2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		1.8		3		5.2		7.5		9.1		9.9		9.5		8.1		5.7		3.5		2.2		1.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.5		4.5		7.3		10.4		13.4		15.3		15.2		15.4		15		11.9		8.5		5.5		3.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.1		3.8		6.2		8.3		10.9		13.6		13.2		13.8		13.4		10.2		7.4		4.9		3.1

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.8		2.6		4.9		8.6		13		16.8		17.6		17.4		15.2		10.3		6		3.4		2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.1		3.4		5.8		7.6		9.2		10		9.6		8.1		6.3		4		2.5		1.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		6.2		9.1		14.4		17.7		19.1		17.2		17.9		18.1		16.1		10.6		6.8		5.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13		5.7		8.2		13.1		17.6		20.7		17.5		18.6		18.6		15.5		9.7		6.3		4.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.1		2		4.2		7		10.7		14.5		14.5		14.9		12.2		8.6		4.6		3		1.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		1.5		2.7		4.8		7.1		9		9.5		9.3		7.8		5.4		3		2		1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.3		3		6		7.9		10.6		13.1		12.6		13.2		11.6		9.5		5.9		4.7		1.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6		2.3		4.8		5.3		7		9.7		8.7		9.7		8.1		7.2		4.7		4		0.8