MAUNA KEA OBSERVATORY, HAWAII

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Elevation: 4200 meters Latitude: 19 49N Longitude: 155 28W

WEATHER

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Daily Averages

Hourly Data

CURRENT CONDITIONS

Sunrise/Set

11:50 am

12:46 am
Local Time
4:56 am EDT
4 May, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.4		-17.8		2.8		1		0.3		4.7		4.3		4.7		4.7		4.9		3.8		3.7		2.4

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7.8		5.6		5.8		4.6		5.2		8.6		9.6		10.5		9.9		10.3		9.1		7.3		5.9

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-2		-3.2		-3.3		-3.9		-3.2		-1.7		-1.4		-0.9		-0.6		-0.4		-1.4		-2.3		-2.4

Highest Recorded Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23.9		12.8		13.3		12.2		12.8		15		14.4		23.9		13.9		15.6		15		12.2		12.8

Lowest Recorded Temperature

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-11.1		-7.2		-11.1		-7.8		-7.8		-11.1		-5		-5.6		-8.3		-5		-6.7		-6.7		-8.3

Average Number of Days Below 32F/0C

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		233.5		---		20		28		24		14		22		23		16		17.5		21		24		24

PRECIPITATION

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		189		22		4		27		12		25		3		5		19		16		14		32		11

Average Number of Days With Precipitation

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		2		1		4		3		2		1		2		3		3		4		3		2

Most Reported Precipitation in a Month

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		182		117		14		123		39		182		14		20		83		45		30		91		59

Most Precipitation Reported in a Day

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		146.8		8.4		14.2		10.7		12.9		146.8		3.8		11.4		43.2		22.9		23.6		25.4		18.5

Avg. No. of Days w/Precip. Above 0.2in/5mm

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		18		1		---		3		2		1		1		1		2		2		2		2		1

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

Years on Record: 11

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

DEGREE DAYS

Heating Degree Days

Years on Record: 11

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3132.2		---		279.4		365.6		373.9		251.1		253.9		250.6		250.6		235.6		277.2		273.3		321.1

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.5		11.5		11.9		12.4		13		13.5		13.7		13.6		13.2		12.6		12		11.6		11.4

SOLAR RADIATION

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.4		15.9		18.6		21.6		24.2		25.4		26.1		25.6		25.1		23.1		19.9		16.3		14.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		4.5		5.2		6		6.7		7.1		6.9		7		6.5		5.9		5.3		4.7		4.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.3		19.3		21.1		22.6		23.4		23.3		26.2		25.4		23.6		23.5		22		19.3		17.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.2		21.3		22.5		23.7		25.3		26.2		27.5		26.6		26.5		25.5		23.6		20.8		20.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.4		15.9		18.6		21.6		24.2		25.4		26.1		25.6		25.1		23.1		19.9		16.3		14.9

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.8		5.3		6.1		7.2		8.1		8.1		7.6		7.8		7.4		7		6.2		5.5		4.9

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.8		23.4		23.9		25.9		25.8		24.4		28.4		27.6		25.9		25.2		24.9		21.9		20.4

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		29.1		28.7		27.7		30.1		30.3		28.8		31.8		30.8		31.6		29		29.1		25.3		25.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.4		12.6		15.2		17.5		18.9		22.4		24.2		23.5		22.9		20.3		16.9		13.5		12.9

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		3.3		4.2		4.8		5.7		6.6		6		6.2		5.4		5.3		4.2		4.1		3.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.9		14.6		16.8		18.1		18.3		20.7		24.3		23.3		21.6		20.5		18.3		15.5		14.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18		13.4		15.2		15.8		15.6		20.4		23.8		22.4		22.2		19.8		17.2		14.4		15.3

NEARBY - MAP

NEARBY - LIST

Halepohaku, Hawaii (3 mi / 5 km)
Mauna Kea, Hawaii (6 mi / 10 km)
Pohakuloa, Hawaii (6 mi / 10 km)
Hamakua Forest Reserve, Hawaii (7 mi / 11 km)
Hilo Forest Reserve, Hawaii (7 mi / 11 km)

GEOBA.SE

Mauna Kea Observatory, Hawaii