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August weather forecast in Saint John's

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

	755 mmHg		84%
	6.4 m/s		+17

27 July, Sunday. day, 18°; night, 14°; rain

28 July, mon

	755 mmHg		84%
	6.7 m/s		+18

28 July, Monday. day, 18°; night, 13°; rain

29 July, tue

	755 mmHg		83%
	6.3 m/s		+17

29 July, Tuesday. day, 18°; night, 13°; partly cloudy

30 July, wed

	754 mmHg		86%
	6.4 m/s		+18

30 July, Wednesday. day, 19°; night, 14°; rain

31 July, thu

	754 mmHg		86%
	6.7 m/s		+17

31 July, Thursday. day, 19°; night, 14°; partly cloudy

1 August, fri

	755 mmHg		85%
	6.1 m/s		+18

1 August, Friday. day, 19°; night, 14°; partly cloudy

2 August, sat

	755 mmHg		84%
	6.3 m/s		+18

2 August, Saturday. day, 18°; night, 14°; overcast

3 August, sun

	755 mmHg		82%
	6.9 m/s		+17

3 August, Sunday. day, 18°; night, 13°; clear

4 August, mon

	756 mmHg		83%
	5.9 m/s		+17

4 August, Monday. day, 18°; night, 14°; partly cloudy

5 August, tue

	756 mmHg		84%
	6.3 m/s		+17

5 August, Tuesday. day, 18°; night, 14°; overcast

6 August, wed

	754 mmHg		84%
	6.9 m/s		+18

6 August, Wednesday. day, 19°; night, 14°; rain

7 August, thu

	754 mmHg		84%
	7 m/s		+18

7 August, Thursday. day, 19°; night, 14°; overcast

8 August, fri

	755 mmHg		82%
	6.8 m/s		+18

8 August, Friday. day, 19°; night, 15°; clear

9 August, sat

	755 mmHg		82%
	6.7 m/s		+19

9 August, Saturday. day, 18°; night, 14°; overcast

10 August, sun

	754 mmHg		83%
	7.3 m/s		+18

10 August, Sunday. day, 19°; night, 14°; rain

11 August, mon

	754 mmHg		84%
	7.3 m/s		+18

11 August, Monday. day, 19°; night, 15°; partly cloudy

12 August, tue

	755 mmHg		83%
	6.7 m/s		+18

12 August, Tuesday. day, 19°; night, 15°; clear

13 August, wed

	755 mmHg		83%
	6.3 m/s		+18

13 August, Wednesday. day, 19°; night, 14°; partly cloudy

14 August, thu

	755 mmHg		84%
	6.6 m/s		+19

14 August, Thursday. day, 19°; night, 15°; overcast

15 August, fri

	755 mmHg		83%
	6.4 m/s		+17

15 August, Friday. day, 19°; night, 14°; partly cloudy

16 August, sat

	757 mmHg		82%
	6.1 m/s		+17

16 August, Saturday. day, 19°; night, 14°; clear

17 August, sun

	755 mmHg		83%
	6.8 m/s		+17

17 August, Sunday. day, 19°; night, 14°; rain

18 August, mon

	754 mmHg		84%
	7.3 m/s		+17

18 August, Monday. day, 18°; night, 15°; rain

19 August, tue

	754 mmHg		84%
	7.4 m/s		+17

19 August, Tuesday. day, 18°; night, 14°; rain

20 August, wed

	755 mmHg		84%
	6.8 m/s		+18

20 August, Wednesday. day, 18°; night, 14°; rain

21 August, thu

	756 mmHg		82%
	6.6 m/s		+19

21 August, Thursday. day, 18°; night, 14°; clear

22 August, fri

	756 mmHg		84%
	6.5 m/s		+18

22 August, Friday. day, 19°; night, 14°; partly cloudy

23 August, sat

	755 mmHg		84%
	6.7 m/s		+17

23 August, Saturday. day, 19°; night, 14°; rain

24 August, sun

	755 mmHg		83%
	6.9 m/s		+18

24 August, Sunday. day, 18°; night, 15°; partly cloudy

25 August, mon

	756 mmHg		83%
	7.2 m/s		+17

25 August, Monday. day, 18°; night, 14°; partly cloudy

26 August, tue

	755 mmHg		82%
	7.7 m/s		+18

26 August, Tuesday. day, 18°; night, 14°; rain

27 August, wed

	755 mmHg		83%
	6.9 m/s		+17

27 August, Wednesday. day, 18°; night, 13°; rain

28 August, thu

	754 mmHg		83%
	7 m/s		+18

28 August, Thursday. day, 18°; night, 14°; rain

29 August, fri

	755 mmHg		82%
	7.5 m/s		+17

29 August, Friday. day, 17°; night, 13°; partly cloudy

30 August, sat

	755 mmHg		82%
	8.5 m/s		+16

30 August, Saturday. day, 17°; night, 13°; rain

31 August, sun

	753 mmHg		84%
	8.2 m/s		+17

31 August, Sunday. day, 17°; night, 13°; rain

1 September, mon

	753 mmHg		84%
	7.6 m/s		+16

1 September, Monday. day, 16°; night, 13°; rain

2 September, tue

	755 mmHg		81%
	6.9 m/s		+16

2 September, Tuesday. day, 16°; night, 12°; clear

3 September, wed

	756 mmHg		81%
	7 m/s		+16

3 September, Wednesday. day, 17°; night, 12°; clear

4 September, thu

	756 mmHg		82%
	7.2 m/s		+17

4 September, Thursday. day, 17°; night, 13°; partly cloudy

5 September, fri

	754 mmHg		84%
	8 m/s		+17

5 September, Friday. day, 17°; night, 13°; clear

6 September, sat

	755 mmHg		81%
	7.4 m/s		+17

6 September, Saturday. day, 17°; night, 13°; clear

Average data for 10 years

Saint John's August

5

sunny days

12

days with precipitation

13

cloudy days

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

83

%

air humidity

5

m/s

WindS

91

mm of precipitation

(8% of annual average)

+18

°C

Water temperature

air humidity 83%; 91 millimeters of precipitation (8% of annual average); Wind southerly 5 Meters per second; Water temperature +18°

Weather graphs for August

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

S

S

S

S

S

S

S

S

S

S

S

S

S

SW

S

S

S

SW

S

S

S

SW

SW

S

S

S

S

S

SW

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

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Halifax
Sydney
New Glasgow
Deer Lake
Blanc-Sablon
St. Anthony
Happy Valley-Goose Bay
Charlottetown
Gander

Cities with similar weather in August

Tallinn
Stockholm
Sydney
Oslo
San Francisco
Palanga
Dublin
Capetown
Looe

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

August in Saint John's is the warmest month of the year. In August, the weather in Saint John's is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Saint John's has 12 rainy, 9 partly cloudy, 5 sunny, and 5 cloudy days in August. The rains are usually heavy.

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