GUIDONIA, ITALY

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.1		7.1		8.3		10.2		13.1		17		20.9		24		23.9		20.9		16.4		11.6		8.2

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		21.3		12.3		13.8		16		19.1		23.6		27.8		31.6		31.3		27.6		22.5		16.9		13.3

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9		1.9		2.9		4.5		7		10.4		14		16.4		16.6		14.1		10.2		6.2		3.2

Highest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40		18		19		25		26		33		37		39		40		39		30		23		19

Lowest Recorded Temperature

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-6		-5		-6		-5		-2		5		9		12		12		7		2		-2		-1

Average Number of Days Above 90F/32C

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29		---		---		---		---		---		3		14		9		2		---		---		---

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		129.2		---		---		0.2		1.3		12.2		23.6		30.2		30.2		23.6		7.8		0.1		---

Average Number of Days Below 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30.9		10.2		6.9		3.5		0.4		---		---		---		---		---		---		2.1		7.8

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		799.2		74.6		74.2		61		66.5		56.6		43.7		27.8		45		71.2		88.7		102.8		87.1

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		83.6		8.3		8		8.3		8.4		6.9		5.3		2.9		3.9		5.7		7.5		9.4		9

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		242		154.8		184.6		134.6		174.5		121		153.6		75.7		131.8		242		240.3		213		179

Least Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		1.4		14.6		---		3.7		---		3.2		---		0.6		0.1		11.2		10.4		7.8

Avg. # of Days w/Precip. Above 0.4in/10mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		26.5		2.7		2.4		2		2.3		1.9		1.4		0.9		1.4		2.1		2.9		3.4		3.1

Average Number of Rainy Days

Years on Record: 99

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		80		8		7		7		6		6		4		2		3		6		9		9		9

Average Snowfall

Years on Record: 2

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Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		71.7		76		73		71		72		71		68		65		66		69		74		78		77

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		9		2		3		6		8		11		13		15		15		13		10		7		4

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1908.7		348.8		282.5		250.6		158.3		41.3		---		---		---		---		61.2		203.3		312.6

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		502.1		---		---		---		---		---		76.7		175.7		173.9		75.8		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2079.2		---		---		7.8		91.7		217		326.7		434		432.3		325.8		197.2		46.7		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.1		11.1		12.4		13.9		15.1		15.8		15.4		14.3		12.9		11.5		10.3		9.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		6.3		9.2		13.2		15.7		19.8		22.8		24.3		20.8		15.8		10.3		6.4		5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		2.6		3.5		5.1		7		8.2		8.4		7.5		6.6		5.4		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		15.7		11.2		13.2		16.1		16.1		18.1		19.8		21.6		20.6		18.1		14.3		10.1		9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.6		11.6		13.7		15.9		14.8		18.5		22.3		26.5		23.3		19		14.1		9.9		8.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		6.3		9.2		13.2		15.7		19.8		22.8		24.3		20.8		15.8		10.3		6.4		5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		2.7		3.8		5.4		7.2		8.5		9		8.3		7.5		5.9		4.3		3		2.3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.4		15.4		18.1		21.9		19.5		20.7		22.1		24.2		23		22		20.5		13.1		12.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.8		17.4		20.8		25.2		20.8		23.7		27.9		33.1		28.4		25.6		23.2		13.9		13

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.5		4.7		6		10.5		12.6		16		19.4		21.2		17.1		13.5		8.3		4.9		3.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.7		2.2		3		4.1		6.5		7.6		7.6		6.3		5.8		4.6		3.2		2.8		2.2

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		7.1		7.4		12.1		12.5		14.7		17		18.9		16.7		15.1		10.6		7		5.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.8		6.3		5.8		10.1		9.4		11.9		16.2		20.2		15.8		14.1		9.1		5.9		4.7