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September weather forecast in Thunder Bay

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

	730 mmHg		68%
	5.5 m/s		+16

1 September, Sunday. day, 19°; night, 16°; clear

2 September, mon

	729 mmHg		68%
	6.1 m/s		+16

2 September, Monday. day, 20°; night, 16°; rain

3 September, tue

	730 mmHg		68%
	6.1 m/s		+15

3 September, Tuesday. day, 17°; night, 15°; partly cloudy

4 September, wed

	731 mmHg		70%
	4.8 m/s		+14

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

5 September, thu

	730 mmHg		70%
	5.1 m/s		+15

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

6 September, fri

	730 mmHg		75%
	4.6 m/s		+15

6 September, Friday. day, 17°; night, 15°; clear

7 September, sat

	732 mmHg		70%
	4.6 m/s		+15

7 September, Saturday. day, 17°; night, 14°; partly cloudy

8 September, sun

	731 mmHg		72%
	5 m/s		+15

8 September, Sunday. day, 17°; night, 13°; clear

9 September, mon

	732 mmHg		74%
	5.5 m/s		+14

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

10 September, tue

	731 mmHg		67%
	5.6 m/s		+15

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

11 September, wed

	730 mmHg		68%
	5.5 m/s		+14

11 September, Wednesday. day, 17°; night, 13°; partly cloudy

12 September, thu

	729 mmHg		67%
	6.4 m/s		+14

12 September, Thursday. day, 17°; night, 13°; clear

13 September, fri

	730 mmHg		68%
	5.6 m/s		+14

13 September, Friday. day, 15°; night, 12°; clear

14 September, sat

	734 mmHg		72%
	5.8 m/s		+13

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

15 September, sun

	734 mmHg		69%
	5.5 m/s		+13

15 September, Sunday. day, 15°; night, 10°; partly cloudy

16 September, mon

	730 mmHg		75%
	6.1 m/s		+13

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

17 September, tue

	732 mmHg		72%
	5 m/s		+12

17 September, Tuesday. day, 13°; night, 12°; partly cloudy

18 September, wed

	730 mmHg		73%
	5.5 m/s		+13

18 September, Wednesday. day, 15°; night, 10°; partly cloudy

19 September, thu

	726 mmHg		70%
	6.6 m/s		+13

19 September, Thursday. day, 17°; night, 13°; clear

20 September, fri

	728 mmHg		67%
	6.5 m/s		+13

20 September, Friday. day, 14°; night, 13°; rain

21 September, sat

	732 mmHg		70%
	5 m/s		+13

21 September, Saturday. day, 14°; night, 11°; clear

22 September, sun

	734 mmHg		75%
	4.9 m/s		+13

22 September, Sunday. day, 14°; night, 11°; overcast

23 September, mon

	733 mmHg		76%
	5.9 m/s		+13

23 September, Monday. day, 15°; night, 12°; rain

24 September, tue

	733 mmHg		75%
	5.8 m/s		+12

24 September, Tuesday. day, 14°; night, 12°; partly cloudy

25 September, wed

	732 mmHg		79%
	4.6 m/s		+12

25 September, Wednesday. day, 14°; night, 11°; clear

26 September, thu

	727 mmHg		73%
	5.6 m/s		+13

26 September, Thursday. day, 15°; night, 12°; rain

27 September, fri

	728 mmHg		74%
	6.5 m/s		+12

27 September, Friday. day, 15°; night, 13°; clear

28 September, sat

	732 mmHg		70%
	7.4 m/s		+11

28 September, Saturday. day, 12°; night, 9°; partly cloudy

29 September, sun

	734 mmHg		72%
	5 m/s		+11

29 September, Sunday. day, 12°; night, 9°; clear

30 September, mon

	733 mmHg		70%
	5.8 m/s		+11

30 September, Monday. day, 12°; night, 9°; partly cloudy

1 October, tue

	733 mmHg		69%
	5.5 m/s		+11

1 October, Tuesday. day, 12°; night, 10°; overcast

2 October, wed

	731 mmHg		76%
	5.8 m/s		+11

2 October, Wednesday. day, 12°; night, 10°; clear

3 October, thu

	732 mmHg		72%
	5.4 m/s		+11

3 October, Thursday. day, 12°; night, 9°; partly cloudy

4 October, fri

	731 mmHg		74%
	6 m/s		+11

4 October, Friday. day, 11°; night, 9°; overcast

5 October, sat

	727 mmHg		75%
	6.4 m/s		+10

5 October, Saturday. day, 11°; night, 9°; partly cloudy

Average data for 10 years

Thunder Bay September

11

sunny days

4

days with precipitation

15

cloudy days

11 sunny days; 4 days with precipitation; 15 cloudy days;

72

%

air humidity

4

m/s

WindW

48

mm of precipitation

(8% of annual average)

+13

°C

Water temperature

air humidity 72%; 48 millimeters of precipitation (8% of annual average); Wind westerly 4 Meters per second; Water temperature +13°

Weather graphs for September

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

SW

SW

NW

W

SW

N

W

W

N

SW

SW

SW

W

N

S

S

SW

S

S

W

W

NE

E

SE

S

SW

NW

N

N

E

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

Wausau
Ashland
Hayward
Minocqua
Cloquet
Spooner
Marshfield
Stevens Point
Medford

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Oslo
Yurmala
Palanga
Dublin
Copenhagen

The weather forecast for September 2024 is based on historical data from the past 10 years.

In September, the weather in Thunder Bay is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Thunder Bay has 14 partly cloudy, 11 sunny, 4 rainy, and 1 cloudy day in September. The rains are usually moderate.

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