ATTAPU, LAOS

Average Temperature

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		78.6		72.1		76.5		80.2		82.4		82		81		80.6		80.4		79.3		78.3		76.5		73.6

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		84.2		81		83.5		87.3		88.2		87.4		85.8		84.7		84.7		83.7		83.1		81.3		80.6

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		68.7		60.6		65.5		65.1		71.6		72.5		72		72.5		72.1		71.1		69.4		67.8		63.9

Average Precipitation

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		81.7		1.4		0.7		1.1		2.6		6.8		11.2		11.4		13.8		12.4		10.5		6.7		3

Average Number of Days With Precipitation

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		150.9		3.3		3.2		4.1		8.4		16.3		22.8		22.7		26.2		19		15.3		5.6		4

Average Number of Days With Frost

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.6		0.7		0.7		0.7		0.6		0.4		0.2		0.1		0.1		0.3		0.5		0.6		0.7

Average Relative Humidity

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		75.3		71.3		68.4		67		69.5		75.4		77.7		77.1		78.3		82.2		81.7		78.8		75.7

Average Dew Point

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		70.1		62.3		65.3		68.3		71.4		73.5		73.3		72.8		73		73.4		72.2		69.4		65.4

Cooling Degree Days

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4959.1		220.1		324.9		471.2		522		527		480		483.6		477.4		429		412.3		345		266.6

Growing Degree Days

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10437.8		685.1		748.6		936.2		972		992		930		948.6		942.4		879		877.3		795		731.6

Average Vapor Pressure

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
InHg		0.7		0.6		0.6		0.6		0.8		0.8		0.8		0.8		0.8		0.8		0.8		0.7		0.6

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		11.7		12		12.4		12.4		13.2		13.4		13.3		13		12.6		12.2		11.8		11.7

Average Possibility of Sunshine

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		54		70.4		67.9		67.3		57.1		52.1		37.9		38.7		34.9		43.9		50.6		60		66.7

Average Percent of Cloud Cover

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		63.8		45		46		50		60		70		83		82		86		77		66		55		46

Average Wind Speed

Years on Record: 112

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		5.2		5.2		5.3		6		5.6		5.2		4.9		4.7		4.7		4.5		4.9		5.6		5.6

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		4.6		5.1		5.4		5.5		5		4.4		4.2		4		4.2		4.1		3.9		4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2		1.5		1.7		2		2.3		2.4		2.3		2.3		2.3		2.2		1.9		1.7		1.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.7		5.2		5.5		5.5		5.3		4.9		4.4		4.1		3.9		4.2		4.3		4.3		4.5

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		5.4		5.4		5		4.7		3.8		2.9		2.7		2.4		2.9		3.3		3.7		4.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		4.6		5.1		5.4		5.5		5		4.4		4.2		4		4.2		4.1		3.9		4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.1		1.7		1.9		2.1		2.3		2.4		2.4		2.4		2.4		2.2		2		1.7		1.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		5.8		6.1		6.1		6		5.6		5.3		4.9		4.7		5.1		5.6		5.1		5.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		6.5		6.5		6.1		5.8		4.9		4.2		3.8		3.7		4.4		5.4		5.1		6.3

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		3.9		4.1		4.9		4.8		4.3		3.8		2.9		3.2		3.5		3.2		3.1		3.1

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.9		1.3		1.5		1.9		2.1		2.3		2.3		2.1		2.2		2.1		1.8		1.6		1.3

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.8		4.3		4.3		5		4.7		4.2		3.7		2.8		3.1		3.4		3.3		3.3		3.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.6		3.9		3.5		4.2		3.6		2.7		2.1		1.2		1.4		2		2		2.4		2.6