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Monthly 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

1 September, sun

	755 mmHg		80%
	5.9 m/s		+19

Climate normal

1 September, Sunday. day, 26°; night, 18°; light rain

2 September, mon

	759 mmHg		46%
	4.9 m/s		+18

Climate normal

2 September, Monday. day, 23°; night, 10°; mostly clear

3 September, tue

	766 mmHg		42%
	5.1 m/s		+18

Climate normal

3 September, Tuesday. day, 22°; night, 10°; clear

4 September, wed

	770 mmHg		50%
	5.4 m/s		+18

Climate normal

4 September, Wednesday. day, 24°; night, 13°; clear

5 September, thu

	769 mmHg		57%
	4.5 m/s		+17

Climate normal

5 September, Thursday. day, 23°; night, 14°; clear

6 September, fri

	766 mmHg		71%
	4.4 m/s		+17

Climate normal

6 September, Friday. day, 21°; night, 17°; light rain

7 September, sat

	761 mmHg		84%
	7 m/s		+17

Climate normal

7 September, Saturday. day, 20°; night, 17°; light rain

8 September, sun

	758 mmHg		71%
	8.1 m/s		+17

Climate normal

8 September, Sunday. day, 20°; night, 13°; light rain

9 September, mon

	762 mmHg		71%
	4.3 m/s		+18

Climate normal

9 September, Monday. day, 20°; night, 13°; partly cloudy

10 September, tue

	762 mmHg		70%
	4.2 m/s		+18

Climate normal

10 September, Tuesday. day, 23°; night, 15°; partly cloudy

11 September, wed

	760 mmHg		70%
	4.4 m/s

Climate normal

11 September, Wednesday. day, 25°; night, 15°; partly cloudy

12 September, thu

	757 mmHg		65%
	5.7 m/s

Climate normal

12 September, Thursday. day, 22°; night, 14°; partly cloudy

13 September, fri

	757 mmHg		61%
	6.4 m/s

Climate normal

13 September, Friday. day, 20°; night, 10°; partly cloudy

14 September, sat

	757 mmHg		90%
	3.1 m/s

Climate normal

14 September, Saturday. day, 19°; night, 16°; light rain

15 September, sun

	759 mmHg		91%
	2.8 m/s

Climate normal

15 September, Sunday. day, 18°; night, 16°; mostly clear

16 September, mon

	759 mmHg		94%
	4.1 m/s

Climate normal

16 September, Monday. day, 19°; night, 17°; rain

17 September, tue

	755 mmHg		94%
	5.9 m/s

Climate normal

17 September, Tuesday. day, 17°; night, 14°; rain

18 September, wed

	758 mmHg		90%
	8.5 m/s

Climate normal

18 September, Wednesday. day, 14°; night, 13°; light rain

19 September, thu

	760 mmHg		84%
	8.3 m/s

Climate normal

19 September, Thursday. day, 16°; night, 14°; partly cloudy

20 September, fri

	761 mmHg		85%
	7.2 m/s

Climate normal

20 September, Friday. day, 17°; night, 14°; clear

21 September, sat

	762 mmHg		87%
	5.8 m/s

Climate normal

21 September, Saturday. day, 16°; night, 13°; clear

22 September, sun

	760 mmHg		80%
	4.4 m/s

Climate normal

22 September, Sunday. day, 18°; night, 11°; clear

23 September, mon

	761 mmHg		85%
	4.2 m/s

Climate normal

23 September, Monday. day, 17°; night, 13°; clear

24 September, tue

	761 mmHg		84%
	2.9 m/s

Climate normal

24 September, Tuesday. day, 19°; night, 16°; mostly clear

25 September, wed

	762 mmHg		78%
	2 m/s

Climate normal

25 September, Wednesday. day, 20°; night, 16°; mostly clear

26 September, thu

	755 mmHg		86%
	4.1 m/s

Climate normal

26 September, Thursday. day, 19°; night, 16°; partly cloudy

27 September, fri

	754 mmHg		83%
	10.7 m/s

Climate normal

27 September, Friday. day, 15°; night, 15°; rain

28 September, sat

	757 mmHg		87%
	11.4 m/s

Climate normal

28 September, Saturday. day, 15°; night, 15°; rain

29 September, sun

	755 mmHg		93%
	10.8 m/s

Climate normal

29 September, Sunday. day, 15°; night, 15°; rain

30 September, mon

	757 mmHg		93%
	9.8 m/s

Climate normal

30 September, Monday. day, 15°; night, 15°; rain

Average data for 10 years

Next, the average data for 10 years

1 October, tue

	758 mmHg		75%
	6.4 m/s		+16

1 October, Tuesday. day, 15°; night, 12°; partly cloudy

2 October, wed

	760 mmHg		79%
	6.4 m/s		+15

2 October, Wednesday. day, 15°; night, 12°; overcast

3 October, thu

	758 mmHg		81%
	6.5 m/s		+15

3 October, Thursday. day, 15°; night, 13°; clear

4 October, fri

	758 mmHg		75%
	6 m/s		+15

4 October, Friday. day, 15°; night, 13°; rain

5 October, sat

	759 mmHg		72%
	5.5 m/s		+15

5 October, Saturday. day, 14°; night, 12°; partly cloudy

Average for 30 days

12

sunny days

11

days with precipitation

7

cloudy days

12 sunny days; 11 days with precipitation; 7 cloudy days;

77

%

air humidity

5.9

m/s

WindNW

18

mm of precipitation

(2% of annual average)

+18

°C

Water temperature

air humidity 77%; 18 millimeters of precipitation (2% of annual average); Wind north-westerly 5.9 Meters per second; Water temperature +18°

Forecast in graphs

TemperatureHumidity, %Wind, m/sPressure, mmHg

S

NW

NW

S

S

SE

E

N

NW

SW

W

SW

W

SW

NW

SE

NW

N

N

NE

NE

E

NE

S

NW

E

E

E

E

NE

1

September

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

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29

30

Daytime temperature

Night-time temperature

Weather forecast for the month based on historical data from the last 10 years.

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