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September weather forecast in Astoria

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

31 August, sun

	762 mmHg		87%
	5.9 m/s		+16

31 August, Sunday. day, 16°; night, 14°; rain

1 September, mon

	762 mmHg		86%
	6.1 m/s		+16

1 September, Monday. day, 16°; night, 14°; partly cloudy

2 September, tue

	762 mmHg		84%
	5.7 m/s		+16

2 September, Tuesday. day, 17°; night, 14°; clear

3 September, wed

	762 mmHg		86%
	5.9 m/s		+16

3 September, Wednesday. day, 17°; night, 14°; clear

4 September, thu

	762 mmHg		85%
	5.4 m/s		+16

4 September, Thursday. day, 16°; night, 14°; clear

5 September, fri

	763 mmHg		85%
	5.9 m/s		+16

5 September, Friday. day, 16°; night, 14°; clear

6 September, sat

	763 mmHg		86%
	6 m/s		+16

6 September, Saturday. day, 16°; night, 14°; partly cloudy

7 September, sun

	763 mmHg		87%
	5.8 m/s		+16

7 September, Sunday. day, 16°; night, 14°; partly cloudy

8 September, mon

	762 mmHg		85%
	6 m/s		+16

8 September, Monday. day, 17°; night, 14°; partly cloudy

9 September, tue

	761 mmHg		84%
	6.2 m/s		+16

9 September, Tuesday. day, 17°; night, 14°; partly cloudy

10 September, wed

	762 mmHg		85%
	6 m/s		+17

10 September, Wednesday. day, 17°; night, 14°; clear

11 September, thu

	762 mmHg		85%
	6 m/s		+16

11 September, Thursday. day, 17°; night, 14°; clear

12 September, fri

	762 mmHg		86%
	5.5 m/s		+16

12 September, Friday. day, 16°; night, 14°; partly cloudy

13 September, sat

	762 mmHg		85%
	5.7 m/s		+16

13 September, Saturday. day, 16°; night, 14°; partly cloudy

14 September, sun

	760 mmHg		87%
	6.1 m/s		+16

14 September, Sunday. day, 16°; night, 14°; overcast

15 September, mon

	760 mmHg		87%
	6 m/s		+15

15 September, Monday. day, 16°; night, 14°; overcast

16 September, tue

	761 mmHg		88%
	5.7 m/s		+15

16 September, Tuesday. day, 15°; night, 13°; rain

17 September, wed

	761 mmHg		86%
	6.4 m/s		+15

17 September, Wednesday. day, 15°; night, 13°; rain

18 September, thu

	761 mmHg		86%
	6.1 m/s		+15

18 September, Thursday. day, 15°; night, 14°; rain

19 September, fri

	762 mmHg		87%
	5.7 m/s		+15

19 September, Friday. day, 15°; night, 13°; rain

20 September, sat

	763 mmHg		84%
	5.7 m/s		+15

20 September, Saturday. day, 16°; night, 13°; partly cloudy

21 September, sun

	763 mmHg		83%
	5.4 m/s		+15

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

22 September, mon

	762 mmHg		81%
	6 m/s		+15

22 September, Monday. day, 16°; night, 14°; clear

23 September, tue

	762 mmHg		83%
	6 m/s		+15

23 September, Tuesday. day, 16°; night, 13°; partly cloudy

24 September, wed

	762 mmHg		85%
	6.1 m/s		+15

24 September, Wednesday. day, 16°; night, 13°; partly cloudy

25 September, thu

	762 mmHg		86%
	6.7 m/s		+15

25 September, Thursday. day, 16°; night, 14°; rain

26 September, fri

	762 mmHg		85%
	7.1 m/s		+16

26 September, Friday. day, 16°; night, 13°; partly cloudy

27 September, sat

	763 mmHg		85%
	7.1 m/s		+15

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

28 September, sun

	762 mmHg		84%
	6.2 m/s		+15

28 September, Sunday. day, 16°; night, 13°; rain

29 September, mon

	761 mmHg		84%
	6.8 m/s		+15

29 September, Monday. day, 15°; night, 13°; rain

30 September, tue

	762 mmHg		85%
	6.9 m/s		+15

30 September, Tuesday. day, 15°; night, 13°; rain

1 October, wed

	762 mmHg		84%
	6.2 m/s		+14

1 October, Wednesday. day, 15°; night, 12°; clear

2 October, thu

	763 mmHg		83%
	6.4 m/s		+14

2 October, Thursday. day, 15°; night, 13°; partly cloudy

3 October, fri

	762 mmHg		82%
	6.6 m/s		+14

3 October, Friday. day, 14°; night, 12°; clear

4 October, sat

	762 mmHg		82%
	6.5 m/s		+15

4 October, Saturday. day, 15°; night, 12°; clear

Average data for 10 years

Astoria September

9

sunny days

8

days with precipitation

7

cloudy days

9 sunny days; 8 days with precipitation; 7 cloudy days;

85

%

air humidity

4.1

m/s

WindSW

65

mm of precipitation

(4% of annual average)

+16

°C

Water temperature

air humidity 85%; 65 millimeters of precipitation (4% of annual average); Wind south-westerly 4.1 Meters per second; Water temperature +16°

Weather graphs for September

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

W

SW

W

W

W

W

W

SW

SW

SW

SW

SW

SW

W

SW

SW

SW

SW

SW

W

SW

SW

SW

S

SW

SW

SW

SW

SW

SW

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

Daytime temperature

Night-time temperature

Cities near you

Vancouver
Seattle
Portland
Salem
Victoria
Eugene
Vancouver
Mount Ranier National Park
Courtenay

Cities with similar weather in September

Sydney
Copenhagen
Vancouver
Gdansk
Looe
Bruges
Perth
Liverpool
Brighton

The weather forecast for September 2025 is based on historical data from the past 10 years.

September in Astoria is the sunniest month of the year. In September, the weather in Astoria is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Astoria has 11 partly cloudy, 9 sunny, 8 rainy, and 2 cloudy days in September. The rains are usually heavy.

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