JOHNSTON ISLAND, NULL

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Elevation: 16 feet Latitude: 16 44N Longitude: 169 31W

WEATHER

Monthly - Summary

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Climate Summary

CURRENT CONDITIONS

Sunrise/Set

01:07 pm

01:14 am
Local Time
6:29 pm EDT
22 September, 2023

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °C ] °F

TEMPERATURE

Average Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		79		77		77		77		78		79		80		81		82		82		81		80		78

Average High Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		83		81		81		81		82		83		84		85		85		85		85		83		81

Average Low Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		75		73		73		73		74		75		76		77		78		78		77		76		75

Highest Recorded Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		90		88		87		85		86		87		88		89		89		89		90		89		86

Lowest Recorded Temperature

Years on Record: 29

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		62		65		64		67		65		68		69		70		70		71		66		63		62

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
in.		27.6		5.6		2.1		2.3		2.6		1.1		0.9		1.3		1.3		1.7		2.3		1.9		3.6

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
in.		9.8		9.8		4.2		3.5		2.8		1.2		0.9		1.2		1		1.5		3.2		2.8		3.1

Most Rain Reported in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		35.1		12.9		5.1		5.7		9.5		2		1.7		2		2.9		2.9		5		6.7		6.8

Least Rain Reported in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		12.6		0.4		0.3		0.7		0.8		0.2		0.3		0.4		0.3		0.3		0.6		0.5		0.2

HUMIDITY

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		80.1		78.7		78.1		80		80.2		79.7		79.3		80		81.6		81.8		81.2		81		79.3

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72.8		71.2		70.9		72.3		72.9		71.8		71.4		72		73.8		74.2		74.1		75.2		73.3

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		71		68		68		69		70		71		72		72		73		74		73		72		70

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		73		71		71		71		72		73		74		75		76		76		75		74		72

DEGREE DAYS

Heating Degree Days

Years on Record: 37

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

Cooling Degree Days

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5442		391		344		399		408		456		472		515		536		520		520		460		421

Growing Degree Days

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10717.8		837		762.8		837		840		899		900		961		992		960		961		900		868

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
%		43.2		29.7		31.2		33.1		51		48.6		47.1		44.7		48.3		47.8		48.1		51.6		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
mph		11		16		18		18		17		16		17		16		14		16		17		18		16

Highest Reported Hourly Wind Speed

Years on Record: 5

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		43		31		38		35		35		32		31		33		32		35		32		33		43

SOLAR RADIATION

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.1		5.1		5.8		6.3		6.7		7		7.2		7		6.7		6.4		5.5		4.8		4.8

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		1.2		1.3		1.7		1.9		1.9		1.8		1.9		1.9		1.8		1.6		1.4		1.2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.4		6		6.5		6.6		6.5		6.8		7.3		7		6.4		6.4		5.9		5.5		5.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.9		7		7.3		7		7		7.3		7.7		7.3		6.9		6.7		6.2		6		6.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.1		5.1		5.8		6.3		6.7		7		7.2		7		6.7		6.4		5.5		4.8		4.8

Maximum 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		1.6		1.9		2.3		2.3		2		2.2		2.3		2		1.9		1.6		1.4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.9		6.4		6.9		7.2		7		7.5		7.7		7.5		7		6.8		6.7		6		6.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		7.9		7.8		8.1		8.3		8		8.6		8.5		8.2		8.2		7.6		7.6		6.8		7.7

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		4.8		5.2		5.6		5.4		6		6.7		6.3		5.6		5.5		4.3		3.9		4.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		1		1.2		1.4		1.7		1.7		1.7		1.7		1.7		1.6		1.3		1.3		1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		5.6		5.7		5.7		5.2		5.8		6.8		6.3		5.3		5.5		4.5		4.3		4.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		6.1		5.8		5.5		4.5		5.3		6.8		5.9		4.7		5.1		3.7		3.9		5.1

NEARBY - MAP

NEARBY - LIST

Johnston Island, Oceania (2 mi / 3 km)

GEOBA.SE

Johnston Island, NULL