LAKE BULL, ANTARCTICA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-3.6		34.5		21.4		-4.7		-21.5		-20.6		-22		-36.4		-26.1		-24.2		3.7		20.8		32.4

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		4.8		40.5		28.2		3.9		-13.7		-10.3		-13.2		-28.1		-15.7		-14.3		14		29.1		38.5

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-11.9		28.4		14.5		-13.2		-29.2		-30.6		-30.6		-44.7		-36.6		-34.1		-6.5		12.4		26.4

Highest Recorded Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		59		59		39.9		32		32		32		32		32		32		36.7		33.3		49.1		57.7

Lowest Recorded Temperature

Years on Record: 9

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Average Number of Days With Snow

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		41.9		3.8		3		7		2		5		6		2		5		2		0.7		1.9		3.5

Av. # of Days w/Snow Depth Above 0.4in/10mm

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28.6		0.5		1.5		12		---		---		7		1		---		6		0.3		0.3		---

Average Number of Days With Frost

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		355		25.8		28		31		30		31		30		31		31		30		31		30		26.2

Average Morning Relative Humidity

Years on Record: 8

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		37.8		34.8		40.7		---		---		---		---		---		---		---		---		---		---

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25076.9		945.5		1231.7		2160.7		2595		2653.6		2610		3143.4		2824.1		2676		1900.3		1326		1010.6

Average Sea Level Pressure

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
InHg		29.4		29.4		29.3		29.4		29.5		29.4		29.6		29.5		29.3		29.4		29.3		29.1		29.3

Average Vapor Pressure

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
InHg		0.2		0.1		---		---		---		---		---		---		---		---		0.2		0.4		0.4

Average Number of Days With Fog

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.1		---		1		---		1		4		3		1		1		---		---		---		0.1

Average Percent of Cloud Cover

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		43.3		51.3		53.8		47.5		47.5		37.5		33.8		18.8		43.8		51.3		40		45		50

Average Wind Speed

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		10.8		14.5		12.6		8.1		5.2		9.6		7		6.3		10.9		10.1		16.3		14.3		15.2

Highest Reported Wind Gust

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		92.1		63.3		57.5		87.5		80.5		92.1		83		---		---		---		---		---		---

Avg. # of Days w/Wind Above 32 mph/52 km/h

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		100.6		29.6		22		15		14		13		7		---		---		---		---		---		---

Avg. # of Days w/Wind Above 39 mph/63 km/h

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		162		14		14		12		13		11		6		6		18		13		22		15.9		17.1

Average Primary Wind Direction

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		238		198		260		270		260		200		240		---		---		---		---		---		---

Avg. # of Days w/Wind Above 59 mph/82 km/h

Years on Record: 7

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		65		1.3		---		6		3		7		3		4		14		12		12		2		0.7

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.4		6.3		4.1		1.7		0.2		---		---		---		---		1		3.2		5.7		6.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.3		3.5		2.3		0.9		0.1		---		---		---		---		0.6		1.4		3.2		3.9

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		6.9		5.2		4.2		1.7		---		---		---		---		2.7		5.4		6.6		7.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.1		7.8		7.9		5		1.5		---		---		---		---		2.8		8		8		7.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.4		6.3		4.1		1.7		0.2		---		---		---		---		1		3.2		5.7		6.9

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		3.7		2.4		1		0.1		---		---		---		---		0.7		1.4		3.3		4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		8.6		5.8		4.8		1.9		---		---		---		---		3		6.5		7.9		8.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		11.1		9.2		5.7		1.7		---		---		---		---		3.2		10.2		10.6		10.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		5		3.3		1.5		0.2		---		---		---		---		0.9		2.4		4.2		5.1

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		3.3		2.2		0.8		0.1		---		---		---		---		0.6		1.3		2.8		3.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		5.3		4.1		3.5		1.4		---		---		---		---		2.3		3.7		4.6		5.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		---		5		5.3		4.1		1.3		---		---		---		---		2.3		4.5		4.3		4.5