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Monthly 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

18 August, sun

	727 mmHg		69%
	5 m/s		+16

18 August, Sunday. day, 19°; night, 16°; clear

19 August, mon

	727 mmHg		74%
	5.5 m/s		+15

19 August, Monday. day, 18°; night, 15°; clear

20 August, tue

	728 mmHg		68%
	5.3 m/s		+16

20 August, Tuesday. day, 20°; night, 15°; partly cloudy

21 August, wed

	730 mmHg		64%
	5.4 m/s		+16

21 August, Wednesday. day, 20°; night, 15°; rain

22 August, thu

	729 mmHg		72%
	5.6 m/s		+16

22 August, Thursday. day, 20°; night, 17°; clear

23 August, fri

	728 mmHg		73%
	6.3 m/s		+15

23 August, Friday. day, 18°; night, 15°; rain

24 August, sat

	748 mmHg		77%
	3.4 m/s		+14

Climate normal

24 August, Saturday. day, 28°; night, 18°; partly cloudy

25 August, sun

	748 mmHg		80%
	3.7 m/s		+14

Climate normal

25 August, Sunday. day, 22°; night, 19°; partly cloudy

26 August, mon

	745 mmHg		77%
	2.7 m/s		+14

Climate normal

26 August, Monday. day, 26°; night, 19°; heavy rain

27 August, tue

	748 mmHg		70%
	4.1 m/s		+13

Climate normal

27 August, Tuesday. day, 20°; night, 15°; overcast

28 August, wed

	747 mmHg		65%
	4.3 m/s		+12

Climate normal

28 August, Wednesday. day, 18°; night, 14°; heavy rain

29 August, thu

	745 mmHg		80%
	3.9 m/s		+14

Climate normal

29 August, Thursday. day, 19°; night, 16°; thunderstorm with rain

30 August, fri

	741 mmHg		66%
	5.2 m/s		+12

Climate normal

30 August, Friday. day, 23°; night, 15°; partly cloudy

31 August, sat

	742 mmHg		68%
	4.1 m/s		+12

Climate normal

31 August, Saturday. day, 23°; night, 14°; light rain

1 September, sun

	745 mmHg		62%
	4.1 m/s		+13

Climate normal

1 September, Sunday. day, 20°; night, 11°; partly cloudy

2 September, mon

	747 mmHg		53%
	3.6 m/s		+13

Climate normal

2 September, Monday. day, 21°; night, 10°; partly cloudy

3 September, tue

	746 mmHg		59%
	3.7 m/s

Climate normal

3 September, Tuesday. day, 21°; night, 13°; partly cloudy

4 September, wed

	744 mmHg		59%
	4.3 m/s

Climate normal

4 September, Wednesday. day, 22°; night, 13°; partly cloudy

5 September, thu

	743 mmHg		63%
	4.6 m/s

Climate normal

5 September, Thursday. day, 18°; night, 15°; mostly clear

6 September, fri

	739 mmHg		75%
	5.2 m/s

Climate normal

6 September, Friday. day, 17°; night, 16°; partly cloudy

7 September, sat

	732 mmHg		92%
	4.4 m/s

Climate normal

7 September, Saturday. day, 18°; night, 16°; rain

8 September, sun

	738 mmHg		82%
	4 m/s

Climate normal

8 September, Sunday. day, 16°; night, 14°; mostly clear

9 September, mon

	742 mmHg		74%
	3 m/s

Climate normal

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

10 September, tue

	741 mmHg		76%
	4.7 m/s

Climate normal

10 September, Tuesday. day, 17°; night, 16°; mostly clear

11 September, wed

	742 mmHg		79%
	4.5 m/s

Climate normal

11 September, Wednesday. day, 17°; night, 14°; mostly clear

12 September, thu

	744 mmHg		75%
	4.5 m/s

Climate normal

12 September, Thursday. day, 16°; night, 14°; mostly clear

13 September, fri

	744 mmHg		77%
	5.1 m/s

Climate normal

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

14 September, sat

	740 mmHg		80%
	3.7 m/s

Climate normal

14 September, Saturday. day, 16°; night, 14°; mostly clear

15 September, sun

	737 mmHg		81%
	1.6 m/s

Climate normal

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

16 September, mon

	736 mmHg		71%
	2.7 m/s

Climate normal

16 September, Monday. day, 17°; night, 16°; partly cloudy

17 September, tue

	739 mmHg		67%
	4.3 m/s

Climate normal

17 September, Tuesday. day, 19°; night, 17°; clear

18 September, wed

	739 mmHg		73%
	7.4 m/s

Climate normal

18 September, Wednesday. day, 19°; night, 17°; clear

19 September, thu

	736 mmHg		79%
	6.2 m/s

Climate normal

19 September, Thursday. day, 18°; night, 17°; clear

20 September, fri

	731 mmHg		78%
	6.1 m/s

Climate normal

20 September, Friday. day, 18°; night, 17°; mostly clear

21 September, sat

	727 mmHg		69%
	6.4 m/s

Climate normal

21 September, Saturday. day, 18°; night, 16°; light rain

Average for 30 days

13

sunny days

5

days with precipitation

12

cloudy days

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

72

%

air humidity

4.5

m/s

WindW

42

mm of precipitation

(7% of annual average)

+13

°C

Water temperature

air humidity 72%; 42 millimeters of precipitation (7% of annual average); Wind westerly 4.5 Meters per second; Water temperature +13°

Forecast in graphs

TemperatureHumidity, %Wind, m/sPressure, mmHg

SE

E

S

NE

E

SE

W

W

NW

W

SW

SW

S

S

NW

NW

SE

W

E

SE

SE

E

E

N

SW

SW

SW

S

W

W

24

Average data for 10 years

25

26

27

28

29

30

31

1

September

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

Daytime temperature

Night-time temperature

Weather forecast for the month based on historical data from the last 10 years.

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