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May weather forecast in Portland

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

26 April, sun

	756 mmHg		82%
	4.5 m/s		+8

26 April, Sunday. day, 9°; night, 7°; clear

27 April, mon

	754 mmHg		77%
	7 m/s		+8

27 April, Monday. day, 11°; night, 7°; clear

28 April, tue

	757 mmHg		68%
	6.5 m/s		+8

28 April, Tuesday. day, 10°; night, 8°; rain

29 April, wed

	759 mmHg		68%
	6.5 m/s		+8

29 April, Wednesday. day, 10°; night, 7°; partly cloudy

30 April, thu

	758 mmHg		75%
	5.9 m/s		+9

30 April, Thursday. day, 10°; night, 7°; partly cloudy

1 May, fri

	757 mmHg		79%
	5 m/s		+9

1 May, Friday. day, 10°; night, 8°; overcast

2 May, sat

	758 mmHg		81%
	5.8 m/s		+9

2 May, Saturday. day, 11°; night, 8°; clear

3 May, sun

	757 mmHg		79%
	5.3 m/s		+10

3 May, Sunday. day, 12°; night, 8°; overcast

4 May, mon

	757 mmHg		81%
	6.1 m/s		+9

4 May, Monday. day, 11°; night, 9°; rain

5 May, tue

	755 mmHg		79%
	5.8 m/s		+10

5 May, Tuesday. day, 12°; night, 8°; partly cloudy

6 May, wed

	755 mmHg		77%
	6 m/s		+10

6 May, Wednesday. day, 13°; night, 9°; partly cloudy

7 May, thu

	755 mmHg		79%
	5.4 m/s		+10

7 May, Thursday. day, 11°; night, 10°; overcast

8 May, fri

	754 mmHg		81%
	6 m/s		+9

8 May, Friday. day, 11°; night, 9°; rain

9 May, sat

	755 mmHg		77%
	6.4 m/s		+10

9 May, Saturday. day, 13°; night, 9°; rain

10 May, sun

	756 mmHg		75%
	6 m/s		+10

10 May, Sunday. day, 13°; night, 9°; partly cloudy

11 May, mon

	756 mmHg		75%
	5.5 m/s		+11

11 May, Monday. day, 14°; night, 10°; clear

12 May, tue

	759 mmHg		68%
	5.8 m/s		+10

12 May, Tuesday. day, 13°; night, 9°; partly cloudy

13 May, wed

	758 mmHg		77%
	6.1 m/s		+10

13 May, Wednesday. day, 12°; night, 9°; clear

14 May, thu

	756 mmHg		80%
	7 m/s		+11

14 May, Thursday. day, 13°; night, 10°; rain

15 May, fri

	756 mmHg		75%
	6 m/s		+11

15 May, Friday. day, 14°; night, 10°; rain

16 May, sat

	756 mmHg		76%
	6.3 m/s		+11

16 May, Saturday. day, 14°; night, 11°; rain

17 May, sun

	758 mmHg		74%
	5.5 m/s		+11

17 May, Sunday. day, 13°; night, 11°; overcast

18 May, mon

	757 mmHg		80%
	6.3 m/s		+11

18 May, Monday. day, 13°; night, 10°; clear

19 May, tue

	756 mmHg		74%
	5.5 m/s		+12

19 May, Tuesday. day, 15°; night, 11°; partly cloudy

20 May, wed

	758 mmHg		73%
	6 m/s		+12

20 May, Wednesday. day, 15°; night, 12°; clear

21 May, thu

	757 mmHg		80%
	4.8 m/s		+12

21 May, Thursday. day, 13°; night, 11°; overcast

22 May, fri

	757 mmHg		82%
	4.9 m/s		+11

22 May, Friday. day, 13°; night, 10°; rain

23 May, sat

	755 mmHg		80%
	5.5 m/s		+13

23 May, Saturday. day, 17°; night, 12°; rain

24 May, sun

	757 mmHg		80%
	6.4 m/s		+12

24 May, Sunday. day, 15°; night, 13°; rain

25 May, mon

	756 mmHg		79%
	6.5 m/s		+13

25 May, Monday. day, 16°; night, 12°; rain

26 May, tue

	757 mmHg		77%
	5.9 m/s		+13

26 May, Tuesday. day, 16°; night, 13°; clear

27 May, wed

	758 mmHg		82%
	5.9 m/s		+12

27 May, Wednesday. day, 14°; night, 12°; rain

28 May, thu

	758 mmHg		83%
	4.8 m/s		+13

28 May, Thursday. day, 15°; night, 11°; rain

29 May, fri

	756 mmHg		80%
	5.5 m/s		+13

29 May, Friday. day, 16°; night, 12°; rain

30 May, sat

	757 mmHg		80%
	5.4 m/s		+13

30 May, Saturday. day, 16°; night, 13°; rain

31 May, sun

	755 mmHg		77%
	6 m/s		+13

31 May, Sunday. day, 17°; night, 13°; rain

1 June, mon

	755 mmHg		75%
	6 m/s		+14

1 June, Monday. day, 16°; night, 14°; clear

2 June, tue

	756 mmHg		79%
	5.4 m/s		+14

2 June, Tuesday. day, 15°; night, 13°; partly cloudy

3 June, wed

	756 mmHg		81%
	5.5 m/s		+13

3 June, Wednesday. day, 15°; night, 12°; overcast

4 June, thu

	755 mmHg		88%
	5.3 m/s		+13

4 June, Thursday. day, 14°; night, 12°; rain

5 June, fri

	754 mmHg		85%
	5.9 m/s		+13

5 June, Friday. day, 15°; night, 12°; rain

6 June, sat

	755 mmHg		75%
	5 m/s		+14

6 June, Saturday. day, 16°; night, 13°; clear

Average data for 10 years

Portland May

6

sunny days

15

days with precipitation

10

cloudy days

6 sunny days; 15 days with precipitation; 10 cloudy days;

77

%

air humidity

3.5

m/s

WindSW

70

mm of precipitation

(8% of annual average)

+11

°C

Water temperature

air humidity 77%; 70 millimeters of precipitation (8% of annual average); Wind south-westerly 3.5 Meters per second; Water temperature +11°

Weather graphs for May

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

S

S

S

E

SW

S

SE

SW

W

N

W

SW

SE

SW

SW

SW

S

W

W

S

S

S

SW

NE

SW

S

SE

SE

S

S

S

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Boston
Montreal
Colchester
Quebec
Anjou
Laval
Nantucket
Bangor
Berlin

Cities with similar weather in May

Helsinki
Riga
Tallinn
Stockholm
Oslo
Yurmala
Palanga
Copenhagen
Gdansk

The weather forecast for May 2024 is based on historical data from the past 10 years.

May in Portland is the rainiest and the cloudiest month of the year. In May, the weather in Portland is typically warm. Average daily high temperature in May is about 14 degrees above zero. On average, Portland has 15 rainy, 6 sunny, 5 cloudy, and 5 partly cloudy days in May. The rains are usually moderate. May as well as March, April, and December is considered the most uncomfortable time to visit Portland.

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