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September weather forecast in Mukilteo

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

	761 mmHg		80%
	4.1 m/s		+17

31 August, Sunday. day, 18°; night, 13°; rain

1 September, mon

	761 mmHg		79%
	4.1 m/s		+16

1 September, Monday. day, 18°; night, 13°; clear

2 September, tue

	761 mmHg		79%
	3.9 m/s		+16

2 September, Tuesday. day, 18°; night, 13°; clear

3 September, wed

	761 mmHg		78%
	4 m/s		+16

3 September, Wednesday. day, 18°; night, 13°; clear

4 September, thu

	762 mmHg		79%
	3.9 m/s		+17

4 September, Thursday. day, 18°; night, 13°; partly cloudy

5 September, fri

	762 mmHg		79%
	3.9 m/s		+17

5 September, Friday. day, 18°; night, 13°; clear

6 September, sat

	762 mmHg		80%
	4 m/s		+17

6 September, Saturday. day, 18°; night, 13°; partly cloudy

7 September, sun

	762 mmHg		80%
	4.4 m/s		+17

7 September, Sunday. day, 18°; night, 13°; clear

8 September, mon

	761 mmHg		79%
	4.3 m/s		+17

8 September, Monday. day, 18°; night, 13°; partly cloudy

9 September, tue

	761 mmHg		79%
	4.19 m/s		+16

9 September, Tuesday. day, 18°; night, 13°; clear

10 September, wed

	761 mmHg		80%
	4.1 m/s		+17

10 September, Wednesday. day, 18°; night, 13°; clear

11 September, thu

	762 mmHg		79%
	4.3 m/s		+17

11 September, Thursday. day, 18°; night, 13°; clear

12 September, fri

	762 mmHg		80%
	4 m/s		+16

12 September, Friday. day, 18°; night, 13°; clear

13 September, sat

	761 mmHg		80%
	3.8 m/s		+16

13 September, Saturday. day, 17°; night, 13°; clear

14 September, sun

	760 mmHg		80%
	3.9 m/s		+17

14 September, Sunday. day, 18°; night, 13°; partly cloudy

15 September, mon

	759 mmHg		81%
	4.1 m/s		+16

15 September, Monday. day, 18°; night, 13°; rain

16 September, tue

	760 mmHg		82%
	3.8 m/s		+16

16 September, Tuesday. day, 17°; night, 13°; rain

17 September, wed

	760 mmHg		82%
	4.9 m/s		+16

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

18 September, thu

	760 mmHg		82%
	4.4 m/s		+16

18 September, Thursday. day, 16°; night, 12°; rain

19 September, fri

	761 mmHg		83%
	4.1 m/s		+16

19 September, Friday. day, 16°; night, 12°; rain

20 September, sat

	762 mmHg		82%
	4 m/s		+16

20 September, Saturday. day, 16°; night, 12°; rain

21 September, sun

	762 mmHg		80%
	4.1 m/s		+16

21 September, Sunday. day, 16°; night, 12°; partly cloudy

22 September, mon

	761 mmHg		79%
	3.9 m/s		+16

22 September, Monday. day, 17°; night, 12°; clear

23 September, tue

	762 mmHg		80%
	4.3 m/s		+16

23 September, Tuesday. day, 17°; night, 12°; rain

24 September, wed

	762 mmHg		82%
	4.5 m/s		+15

24 September, Wednesday. day, 17°; night, 12°; partly cloudy

25 September, thu

	761 mmHg		81%
	4.9 m/s		+15

25 September, Thursday. day, 17°; night, 13°; rain

26 September, fri

	762 mmHg		82%
	5 m/s		+15

26 September, Friday. day, 16°; night, 12°; rain

27 September, sat

	762 mmHg		82%
	4.9 m/s		+16

27 September, Saturday. day, 16°; night, 12°; rain

28 September, sun

	761 mmHg		82%
	4.9 m/s		+15

28 September, Sunday. day, 16°; night, 12°; clear

29 September, mon

	760 mmHg		81%
	4.8 m/s		+15

29 September, Monday. day, 16°; night, 12°; partly cloudy

30 September, tue

	761 mmHg		83%
	4.69 m/s		+14

30 September, Tuesday. day, 15°; night, 12°; partly cloudy

1 October, wed

	762 mmHg		82%
	4.4 m/s		+15

1 October, Wednesday. day, 15°; night, 11°; clear

2 October, thu

	762 mmHg		82%
	4.4 m/s		+14

2 October, Thursday. day, 15°; night, 11°; clear

3 October, fri

	762 mmHg		82%
	4.8 m/s		+15

3 October, Friday. day, 14°; night, 11°; clear

4 October, sat

	761 mmHg		82%
	4.69 m/s		+15

4 October, Saturday. day, 14°; night, 11°; clear

Average data for 10 years

Mukilteo September

12

sunny days

10

days with precipitation

5

cloudy days

12 sunny days; 10 days with precipitation; 5 cloudy days;

81

%

air humidity

2.5

m/s

WindSW

69

mm of precipitation

(6% of annual average)

+16

°C

Water temperature

air humidity 81%; 69 millimeters of precipitation (6% of annual average); Wind south-westerly 2.5 Meters per second; Water temperature +16°

Weather graphs for September

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

S

S

S

S

SW

SW

S

S

S

SW

S

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

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26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Vancouver
Seattle
Portland
Tacoma
Victoria
Vernon
Mount Ranier National Park
Leavenworth
Salem

Cities with similar weather in September

San Francisco
Toronto
Boston
Montreal
San Sebastian
Santander
Durban
Rijeka
Kunming

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

In September, the weather in Mukilteo is typically warm. Average daily high temperature in September is about 17 degrees above zero. On average, Mukilteo has 12 sunny, 10 rainy, and 8 partly cloudy days in September. The rains are usually heavy.

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