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September weather forecast in Rimouski

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

	760 mmHg		83%
	6.9 m/s		+14

31 August, Sunday. day, 14°; night, 12°; rain

1 September, mon

	761 mmHg		81%
	7.1 m/s		+15

1 September, Monday. day, 15°; night, 12°; clear

2 September, tue

	762 mmHg		80%
	6.9 m/s		+15

2 September, Tuesday. day, 15°; night, 12°; clear

3 September, wed

	761 mmHg		81%
	7.2 m/s		+14

3 September, Wednesday. day, 15°; night, 12°; rain

4 September, thu

	760 mmHg		81%
	7.1 m/s		+15

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

5 September, fri

	761 mmHg		80%
	6.8 m/s		+14

5 September, Friday. day, 14°; night, 11°; clear

6 September, sat

	762 mmHg		80%
	7.4 m/s		+14

6 September, Saturday. day, 14°; night, 11°; partly cloudy

7 September, sun

	760 mmHg		82%
	7.8 m/s		+14

7 September, Sunday. day, 15°; night, 12°; overcast

8 September, mon

	760 mmHg		82%
	7.7 m/s		+13

8 September, Monday. day, 14°; night, 12°; rain

9 September, tue

	762 mmHg		83%
	7.5 m/s		+13

9 September, Tuesday. day, 13°; night, 11°; rain

10 September, wed

	763 mmHg		82%
	6.8 m/s		+13

10 September, Wednesday. day, 13°; night, 10°; partly cloudy

11 September, thu

	763 mmHg		81%
	7.3 m/s		+13

11 September, Thursday. day, 13°; night, 10°; clear

12 September, fri

	761 mmHg		81%
	7.7 m/s		+13

12 September, Friday. day, 13°; night, 11°; clear

13 September, sat

	761 mmHg		80%
	7.4 m/s		+12

13 September, Saturday. day, 14°; night, 11°; partly cloudy

14 September, sun

	761 mmHg		82%
	7.5 m/s		+12

14 September, Sunday. day, 13°; night, 11°; rain

15 September, mon

	761 mmHg		81%
	7.5 m/s		+11

15 September, Monday. day, 13°; night, 11°; overcast

16 September, tue

	762 mmHg		79%
	7.3 m/s		+12

16 September, Tuesday. day, 13°; night, 10°; clear

17 September, wed

	762 mmHg		78%
	8.2 m/s		+12

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

18 September, thu

	762 mmHg		79%
	7.1 m/s		+13

18 September, Thursday. day, 12°; night, 10°; clear

19 September, fri

	763 mmHg		79%
	7.6 m/s		+11

19 September, Friday. day, 12°; night, 10°; clear

20 September, sat

	762 mmHg		80%
	7.5 m/s		+12

20 September, Saturday. day, 12°; night, 10°; partly cloudy

21 September, sun

	762 mmHg		81%
	7.2 m/s		+12

21 September, Sunday. day, 12°; night, 10°; clear

22 September, mon

	761 mmHg		81%
	7.8 m/s		+11

22 September, Monday. day, 13°; night, 10°; rain

23 September, tue

	760 mmHg		80%
	7.8 m/s		+10

23 September, Tuesday. day, 12°; night, 10°; overcast

24 September, wed

	763 mmHg		77%
	7.2 m/s		+11

24 September, Wednesday. day, 11°; night, 9°; clear

25 September, thu

	763 mmHg		78%
	7.7 m/s		+11

25 September, Thursday. day, 12°; night, 9°; partly cloudy

26 September, fri

	762 mmHg		83%
	6.8 m/s		+11

26 September, Friday. day, 12°; night, 9°; rain

27 September, sat

	762 mmHg		82%
	7.1 m/s		+11

27 September, Saturday. day, 12°; night, 9°; rain

28 September, sun

	761 mmHg		82%
	7.1 m/s		+11

28 September, Sunday. day, 12°; night, 9°; rain

29 September, mon

	762 mmHg		80%
	7.6 m/s		+10

29 September, Monday. day, 11°; night, 9°; rain

30 September, tue

	762 mmHg		79%
	8.3 m/s		+10

30 September, Tuesday. day, 11°; night, 8°; rain

1 October, wed

	762 mmHg		80%
	7.7 m/s		+10

1 October, Wednesday. day, 11°; night, 8°; clear

2 October, thu

	762 mmHg		81%
	7.8 m/s		+10

2 October, Thursday. day, 11°; night, 8°; clear

3 October, fri

	763 mmHg		77%
	7.6 m/s		+9

3 October, Friday. day, 10°; night, 8°; clear

4 October, sat

	764 mmHg		77%
	7.3 m/s		+9

4 October, Saturday. day, 10°; night, 8°; clear

Average data for 10 years

Rimouski September

11

sunny days

11

days with precipitation

7

cloudy days

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

81

%

air humidity

5.1

m/s

WindS

107

mm of precipitation

(10% of annual average)

+12

°C

Water temperature

air humidity 81%; 107 millimeters of precipitation (10% of annual average); Wind southerly 5.1 Meters per second; Water temperature +12°

Weather graphs for September

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

SW

S

S

S

SW

S

S

S

S

SW

S

S

S

S

SW

SW

S

S

S

S

S

S

SW

S

S

S

S

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

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26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Quebec
Saguenay
Bangor
Baie-Comeau
Sainte-Foy
Bonaventure
Alma
Iles de la Madeleine
Riviere Du Loup

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Oslo
Yurmala
Palanga
Dublin
Buenos Aires

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

In September, the weather in Rimouski is typically warm. Average daily high temperature in September is about 13 degrees above zero. On average, Rimouski has 11 rainy, 11 sunny, 5 partly cloudy, and 3 cloudy days in September. The rains are usually heavy. September as well as April, May, June, and October is considered the most uncomfortable time to visit Rimouski.

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