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August weather forecast in Montreal

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

27 July, sun

	757 mmHg		76%
	4.5 m/s

27 July, Sunday. day, 26°; night, 18°; rain

28 July, mon

	757 mmHg		75%
	4.3 m/s

28 July, Monday. day, 25°; night, 18°; rain

29 July, tue

	757 mmHg		73%
	4.3 m/s

29 July, Tuesday. day, 26°; night, 18°; partly cloudy

30 July, wed

	758 mmHg		72%
	4.3 m/s

30 July, Wednesday. day, 26°; night, 17°; clear

31 July, thu

	758 mmHg		74%
	4 m/s

31 July, Thursday. day, 26°; night, 18°; clear

1 August, fri

	758 mmHg		73%
	4.19 m/s

1 August, Friday. day, 26°; night, 18°; partly cloudy

2 August, sat

	758 mmHg		75%
	4.4 m/s

2 August, Saturday. day, 26°; night, 18°; rain

3 August, sun

	758 mmHg		75%
	4.4 m/s

3 August, Sunday. day, 26°; night, 19°; rain

4 August, mon

	758 mmHg		75%
	4.3 m/s

4 August, Monday. day, 26°; night, 18°; rain

5 August, tue

	758 mmHg		73%
	4.3 m/s

5 August, Tuesday. day, 26°; night, 18°; rain

6 August, wed

	758 mmHg		72%
	4.4 m/s

6 August, Wednesday. day, 25°; night, 17°; rain

7 August, thu

	758 mmHg		74%
	4.3 m/s

7 August, Thursday. day, 25°; night, 17°; clear

8 August, fri

	758 mmHg		75%
	4.19 m/s

8 August, Friday. day, 26°; night, 17°; rain

9 August, sat

	758 mmHg		75%
	4.4 m/s

9 August, Saturday. day, 25°; night, 18°; rain

10 August, sun

	757 mmHg		75%
	4.4 m/s

10 August, Sunday. day, 26°; night, 18°; rain

11 August, mon

	757 mmHg		76%
	4.19 m/s

11 August, Monday. day, 25°; night, 18°; rain

12 August, tue

	758 mmHg		74%
	4.5 m/s

12 August, Tuesday. day, 25°; night, 18°; overcast

13 August, wed

	758 mmHg		76%
	4.19 m/s

13 August, Wednesday. day, 25°; night, 17°; rain

14 August, thu

	758 mmHg		75%
	4 m/s

14 August, Thursday. day, 25°; night, 17°; partly cloudy

15 August, fri

	759 mmHg		75%
	3.9 m/s

15 August, Friday. day, 25°; night, 17°; partly cloudy

16 August, sat

	758 mmHg		75%
	4.3 m/s

16 August, Saturday. day, 25°; night, 18°; partly cloudy

17 August, sun

	758 mmHg		75%
	4.6 m/s

17 August, Sunday. day, 25°; night, 17°; partly cloudy

18 August, mon

	757 mmHg		75%
	4.9 m/s

18 August, Monday. day, 25°; night, 18°; rain

19 August, tue

	758 mmHg		74%
	4.3 m/s

19 August, Tuesday. day, 24°; night, 16°; clear

20 August, wed

	759 mmHg		74%
	4.19 m/s

20 August, Wednesday. day, 24°; night, 16°; clear

21 August, thu

	759 mmHg		76%
	4.4 m/s

21 August, Thursday. day, 24°; night, 18°; rain

22 August, fri

	758 mmHg		76%
	4.4 m/s

22 August, Friday. day, 24°; night, 17°; partly cloudy

23 August, sat

	759 mmHg		75%
	4.4 m/s

23 August, Saturday. day, 23°; night, 16°; partly cloudy

24 August, sun

	759 mmHg		74%
	4.4 m/s

24 August, Sunday. day, 24°; night, 16°; clear

25 August, mon

	759 mmHg		75%
	4.3 m/s

25 August, Monday. day, 24°; night, 16°; clear

26 August, tue

	759 mmHg		75%
	4.3 m/s

26 August, Tuesday. day, 24°; night, 16°; clear

27 August, wed

	759 mmHg		75%
	4.1 m/s

27 August, Wednesday. day, 24°; night, 16°; partly cloudy

28 August, thu

	759 mmHg		76%
	4.19 m/s

28 August, Thursday. day, 24°; night, 16°; partly cloudy

29 August, fri

	759 mmHg		78%
	4.6 m/s

29 August, Friday. day, 24°; night, 16°; overcast

30 August, sat

	759 mmHg		77%
	4.8 m/s

30 August, Saturday. day, 24°; night, 16°; partly cloudy

31 August, sun

	759 mmHg		76%
	4.69 m/s

31 August, Sunday. day, 23°; night, 16°; clear

1 September, mon

	760 mmHg		75%
	4.3 m/s

1 September, Monday. day, 23°; night, 15°; clear

2 September, tue

	760 mmHg		75%
	4.6 m/s

2 September, Tuesday. day, 23°; night, 15°; clear

3 September, wed

	759 mmHg		76%
	4.4 m/s

3 September, Wednesday. day, 24°; night, 15°; clear

4 September, thu

	758 mmHg		76%
	4.69 m/s

4 September, Thursday. day, 23°; night, 16°; rain

5 September, fri

	760 mmHg		74%
	4.6 m/s

5 September, Friday. day, 23°; night, 15°; clear

6 September, sat

	761 mmHg		77%
	4.4 m/s

6 September, Saturday. day, 23°; night, 15°; clear

Average data for 10 years

Montreal August

7

sunny days

12

days with precipitation

6

cloudy days

7 sunny days; 12 days with precipitation; 6 cloudy days;

75

%

air humidity

3

m/s

WindSW

100

mm of precipitation

(9% of annual average)

air humidity 75%; 100 millimeters of precipitation (9% of annual average); Wind south-westerly 3 Meters per second

Weather graphs for August

TemperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

SW

SW

SW

S

SW

SW

SW

S

S

SW

SW

S

S

SW

S

SW

SW

SW

SW

SW

SW

SW

S

SW

S

SW

S

S

S

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

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Ottawa
Colchester
Quebec
Brooklyn
Laval
Saguenay
Lake George
Portland
Berlin

Cities with similar weather in August

Lisbon
Toronto
Porto
Genoa
Santa Cruz de Tenerife
Funchal
Seattle
Las Palmas de Gran Canaria
Playa de las Americas

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

In August, the weather in Montreal is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Montreal has 12 rainy, 10 partly cloudy, 7 sunny, and 2 cloudy days in August. The rains are usually heavy.

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