PORTLAND, MAINE

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Elevation: 7 feet Latitude: 43 39N Longitude: 070 19W

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °C ] °F

TEMPERATURE

Average Temperature

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		45.7		22.1		24		32.8		43.2		53.3		62.7		68.5		67.3		59.6		49.1		39		27.2

Average High Temperature

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		55		31.1		33.3		41.2		52.3		63		72.5		78.3		77		69.4		58.9		47.3		35.7

Average Low Temperature

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		36.5		13.2		14.8		24.4		34.1		43.6		52.9		58.7		57.5		49.7		39.4		30.7		18.8

Highest Recorded Temperature

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		103		67		64		88		92		96		98		100		103		96		88		74		71

Lowest Recorded Temperature

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-26		-26		-25		-21		8		23		33		40		33		23		15		3		-21

Average Number of Days Above 90F/32C

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.7		---		---		---		---		0.3		1		1.8		1.3		0.4		---		---		---

Average Number of Days Above 65F/18C

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		131		---		---		---		3		13		25		30		30		22		7		1		---

Average Number of Days Below 32F/0C

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		148.5		29.5		26.5		24.9		12.1		1.6		---		---		---		0.6		7.3		18		27.9

Average Number of Days Below 5F/-15C

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		23		9		7		2		---		---		---		---		---		---		---		---		5

Average Number of Days Below 0F/-17C

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10.3		4.8		3.1		0.5		---		---		---		---		---		---		---		---		1.8

PRECIPITATION

Average Precipitation

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		44.2		3.8		3.6		4		4		3.5		3.4		3.1		2.9		3.4		3.8		4.5		4.1

Average Number of Days With Precipitation

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		131		11		10		12		12		12		12		10		10		9		10		11		12

Most Reported Precipitation in a Month

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		15.2		12.3		9		11.2		9.9		12.3		10.5		8.6		15.2		10.8		14.8		13.5		9.7

Least Reported Precipitation in a Month

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		0.3		---		0.8		0.3		0.5		0.7		0.6		0.3		0.3		0.1		0.6		1

Most Precipitation Reported in a Day

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		9.6		3.6		3.8		3.5		5.2		3.5		4.3		4.2		7.8		7.5		9.6		5		3.5

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

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		78		7		6		7		7		7		7		6		5		6		6		7		7

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

Years on Record: 91

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

Avg. No. of Days w/Precip. Above 1in/25mm

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		1		1		1		1		1		1		1		1		1		1		1		1

PRECIPITATION - RAIN

Average Number of Rainy Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		129		11		10		11		12		12		11		10		9		9		9		12		12

Average Number of Days With Thunderstorms

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		16		---		---		---		---		2		4		4		4		1		1		---		---

Most Rain Reported in a Month

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		66.3		11.9		7.1		10		9.9		9.6		6.8		7.5		15.2		9.8		12.3		13.5		9.7

Least Recorded Rainfall

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		26.3		0.8		---		0.8		1		0.5		0.8		0.6		0.5		0.3		0.6		0.9		1

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		71.4		19.7		17.4		12.8		3.2		0.1		---		---		---		---		0.2		3.2		14.8

Most Snow Reported in a Month

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		62.4		62.4		61.2		49		15.9		7		---		---		---		---		3.8		24.3		54.8

HUMIDITY

Average Morning Relative Humidity

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		79		75		75		74		73		75		78		80		83		86		84		82		78

Average Evening Relative Humidity

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		62		62		59		60		58		61		63		62		63		64		64		66		65

Average Dew Point

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		36		13		14		22		32		43		53		59		58		51		40		31		18

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7318		1346		1141		985		649		361		116		19		37		199		523		790		1152

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		347		---		---		---		---		7		51		144		120		24		1		---		---

Growing Degree Days

Years on Record: 91

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1881.1		---		---		---		---		102.3		381		573.5		536.3		288		---		---		---

VISIBILITY

Average Number of Days With Fog

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		167		10		9		12		14		15		16		17		17		16		15		14		12

Average Number of Clear Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		101		10		9		9		7		6		7		7		9		10		10		8		9

Average Possibility of Sunshine

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		57		56		59		56		54		55		59		63		63		62		58		48		53

Average Number of Cloudy Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		165		14		12		15		16		15		13		13		11		12		13		15		15

Average Number of Partly Cloudy Days

Years on Record: 53

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		99		7		7		7		7		10		10		11		11		8		8		7		7

WIND

Average Wind Speed

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		10		9		10		10		11		11		10		10		10		10		9		9		9

NEARBY - MAP

NEARBY - LIST

Portland - East End, Maine (3 mi / 5 km)
Biddeford, Maine (12 mi / 19 km)
West Buxton, Maine (15 mi / 24 km)
Brunswick Station, Maine (24 mi / 40 km)
Brunswick, Maine (25 mi / 41 km)

GEOBA.SE

Portland, Maine

WEATHER FORECAST