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September weather forecast in La Conner

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		82%
	3.4 m/s		+15

31 August, Sunday. day, 19°; night, 13°; rain

1 September, mon

	762 mmHg		81%
	3.4 m/s		+15

1 September, Monday. day, 19°; night, 13°; clear

2 September, tue

	762 mmHg		81%
	3.2 m/s		+15

2 September, Tuesday. day, 19°; night, 13°; clear

3 September, wed

	762 mmHg		81%
	3.3 m/s		+15

3 September, Wednesday. day, 19°; night, 13°; clear

4 September, thu

	762 mmHg		81%
	3.2 m/s		+15

4 September, Thursday. day, 19°; night, 13°; clear

5 September, fri

	763 mmHg		82%
	3.3 m/s		+14

5 September, Friday. day, 19°; night, 13°; partly cloudy

6 September, sat

	763 mmHg		81%
	3.5 m/s		+15

6 September, Saturday. day, 19°; night, 13°; partly cloudy

7 September, sun

	763 mmHg		82%
	3.5 m/s		+15

7 September, Sunday. day, 19°; night, 13°; clear

8 September, mon

	762 mmHg		81%
	3.6 m/s		+15

8 September, Monday. day, 19°; night, 13°; partly cloudy

9 September, tue

	761 mmHg		81%
	3.4 m/s		+15

9 September, Tuesday. day, 19°; night, 13°; partly cloudy

10 September, wed

	762 mmHg		82%
	3.3 m/s		+16

10 September, Wednesday. day, 19°; night, 13°; clear

11 September, thu

	763 mmHg		81%
	3.3 m/s		+15

11 September, Thursday. day, 19°; night, 13°; clear

12 September, fri

	762 mmHg		81%
	3.1 m/s		+16

12 September, Friday. day, 19°; night, 13°; clear

13 September, sat

	762 mmHg		83%
	3 m/s		+15

13 September, Saturday. day, 18°; night, 13°; clear

14 September, sun

	760 mmHg		84%
	3.3 m/s		+15

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

15 September, mon

	760 mmHg		83%
	3.5 m/s		+15

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

16 September, tue

	761 mmHg		83%
	3.4 m/s		+15

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

17 September, wed

	761 mmHg		83%
	4.1 m/s		+15

17 September, Wednesday. day, 17°; night, 12°; rain

18 September, thu

	761 mmHg		84%
	4 m/s		+15

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

19 September, fri

	762 mmHg		84%
	3.6 m/s		+14

19 September, Friday. day, 17°; night, 12°; rain

20 September, sat

	763 mmHg		83%
	3.4 m/s		+15

20 September, Saturday. day, 17°; night, 12°; partly cloudy

21 September, sun

	763 mmHg		82%
	3.3 m/s		+15

21 September, Sunday. day, 17°; night, 12°; clear

22 September, mon

	762 mmHg		81%
	3.4 m/s		+15

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

23 September, tue

	763 mmHg		81%
	3.8 m/s		+15

23 September, Tuesday. day, 17°; night, 12°; partly cloudy

24 September, wed

	763 mmHg		83%
	3.7 m/s		+15

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

25 September, thu

	762 mmHg		83%
	4 m/s		+14

25 September, Thursday. day, 17°; night, 12°; rain

26 September, fri

	763 mmHg		85%
	4.3 m/s		+15

26 September, Friday. day, 16°; night, 11°; rain

27 September, sat

	763 mmHg		85%
	4 m/s		+15

27 September, Saturday. day, 16°; night, 11°; clear

28 September, sun

	762 mmHg		84%
	3.6 m/s		+14

28 September, Sunday. day, 17°; night, 11°; partly cloudy

29 September, mon

	761 mmHg		83%
	4 m/s		+15

29 September, Monday. day, 16°; night, 11°; rain

30 September, tue

	762 mmHg		85%
	4.19 m/s		+15

30 September, Tuesday. day, 15°; night, 11°; rain

1 October, wed

	762 mmHg		85%
	3.5 m/s		+14

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

2 October, thu

	763 mmHg		84%
	3.9 m/s		+14

2 October, Thursday. day, 15°; night, 10°; partly cloudy

3 October, fri

	763 mmHg		83%
	3.9 m/s		+14

3 October, Friday. day, 15°; night, 11°; clear

4 October, sat

	762 mmHg		84%
	3.7 m/s		+14

4 October, Saturday. day, 15°; night, 10°; clear

Average data for 10 years

La Conner September

12

sunny days

9

days with precipitation

5

cloudy days

12 sunny days; 9 days with precipitation; 5 cloudy days;

83

%

air humidity

2.09

m/s

WindS

76

mm of precipitation

(6% of annual average)

+15

°C

Water temperature

air humidity 83%; 76 millimeters of precipitation (6% of annual average); Wind southerly 2.09 Meters per second; Water temperature +15°

Weather graphs for September

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

S

S

S

S

S

S

SW

S

S

S

S

S

S

S

S

S

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
Vancouver
Mount Ranier National Park
Courtenay
Kelowna

Cities with similar weather in September

Sydney
San Francisco
Balkhash
Montreal
Bruges
San Sebastian
Brighton
Rijeka
Bournemouth

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

In September, the weather in La Conner is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, La Conner has 12 sunny, 9 rainy, and 9 partly cloudy days in September. The rains are usually heavy.

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