JOHNSTON ISLAND, NULL

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Elevation: 4 meters Latitude: 16 44N Longitude: 169 31W

WEATHER

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Climate Summary

CURRENT CONDITIONS

Sunrise/Set

12:52 pm

01:37 am
Local Time
8:42 am EDT
1 May, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		26		25		25		25		25		26		26		27		27		27		27		26		25

Average High Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		28		27		27		27		27		28		28		29		29		29		29		28		27

Average Low Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		23		22		22		22		23		23		24		25		25		25		25		24		23

Highest Recorded Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		32.2		31.1		30.6		29.4		30		30.6		31.1		31.7		31.7		31.7		32.2		31.7		30

Lowest Recorded Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16.7		18.3		17.8		19.4		18.3		20		20.6		21.1		21.1		21.7		18.9		17.2		16.7

Average Number of Days Above 86F/30C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		104		1		1		1		4		8		17		24		23		17		6		1		1

Average Number of Days Below 70F/21C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		3		1		1		1		1		---		---		---		---		---		1		---

PRECIPITATION

Average Precipitation

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		700		140		50		50		60		20		20		30		30		40		50		40		90

PRECIPITATION - RAIN

Average Number of Rainy Days

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		144		11		10		10		14		12		11		13		11		12		13		13		14

Average Number of Days With Thunderstorms

Years on Record: 9

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

Most Rain Reported in a Day

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		240		240		100		80		70		30		20		30		20		30		80		70		70

Most Rain Reported in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		890		320		120		140		240		40		40		50		70		70		120		170		170

Least Rain Reported in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		310		---		---		10		20		---		---		10		---		---		10		10		---

HUMIDITY

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		80		78		78		80		80		79		79		80		81		81		81		81		79

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72		71		70		72		72		71		71		72		73		74		74		75		73

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		21		20		20		20		21		21		22		22		22		23		22		22		21

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		22		21		21		21		22		22		23		23		24		24		23		23		22

DEGREE DAYS

Heating Degree Days

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.6		0.6		---		---		---		---		---		---		---		---		---		---		---

Cooling Degree Days

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3023.3		217.2		191.1		221.7		226.7		253.3		262.2		286.1		297.8		288.9		288.9		255.6		233.9

Growing Degree Days

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6340.1		465		423.8		465		466.7		499.4		500		533.9		551.1		533.3		533.9		500		482.2

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		11.7		12		12.4		12.9		13.3		13.5		13.4		13		12.6		12.1		11.7		11.5

Average Number of Clear Days

Years on Record: 24

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		99		13		11		11		7		6		7		6		6		6		7		7		11

Average Possibility of Sunshine

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		71		70		74		74		70		74		78		79		76		73		65		59		62

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		43		29		31		33		51		48		47		44		48		47		48		51		37

Average Number of Partly Cloudy Days

Years on Record: 24

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		159		14		13		14		12		13		15		16		14		13		12		12		13

WIND

Average Wind Speed

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		17		25		28		28		27		25		27		25		22		25		27		28		25

Highest Reported Hourly Wind Speed

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		69.2		49.9		61.2		56.3		56.3		51.5		49.9		53.1		51.5		56.3		51.5		53.1		69.2

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		22		18.4		20.9		22.8		24.3		25.2		25.9		25.1		24.2		22.9		19.8		17.4		17.1

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.9		4.2		4.8		5.9		6.8		7		6.6		6.9		6.9		6.3		5.8		5		4.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23		21.6		23.3		23.6		23.4		24.6		26.4		25.3		22.9		23		21.3		19.9		20.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.8		25		26.2		25.3		25.1		26.1		27.7		26.1		24.7		24.3		22.1		21.5		23.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22		18.4		20.9		22.8		24.3		25.2		25.9		25.1		24.2		22.9		19.8		17.4		17.1

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		4.8		5.8		7		8.2		8.2		7.3		7.8		8.1		7.3		6.8		5.9		5

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.9		23.1		24.8		25.9		25.2		26.9		27.8		27.1		25		24.5		24.1		21.5		22.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		28.6		28		29.2		29.8		28.7		30.9		30.5		29.6		29.3		27.3		27.3		24.3		27.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19		17.2		18.7		20.1		19.4		21.5		24.2		22.5		20.1		19.9		15.3		14		15

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.2		3.7		4.2		5		6		6		6		6.2		5.9		5.7		4.8		4.5		3.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.7		20.1		20.5		20.6		18.8		20.8		24.6		22.6		19		19.9		16.2		15.6		17.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.7		22.1		21		19.7		16.1		18.9		24.4		21.1		17		18.4		13.4		14.2		18.3

NEARBY - MAP

NEARBY - LIST

Johnston Island, Oceania (2 mi / 3 km)

GEOBA.SE

Johnston Island, NULL