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August weather forecast in Cornwall

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

	752 mmHg		78%
	3.8 m/s

27 July, Sunday. day, 26°; night, 17°; rain

28 July, mon

	752 mmHg		78%
	3.7 m/s

28 July, Monday. day, 26°; night, 17°; rain

29 July, tue

	752 mmHg		75%
	3.5 m/s

29 July, Tuesday. day, 26°; night, 16°; clear

30 July, wed

	753 mmHg		74%
	3.5 m/s

30 July, Wednesday. day, 25°; night, 16°; clear

31 July, thu

	754 mmHg		75%
	3.4 m/s

31 July, Thursday. day, 26°; night, 16°; clear

1 August, fri

	754 mmHg		75%
	3.5 m/s

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

2 August, sat

	753 mmHg		77%
	3.8 m/s

2 August, Saturday. day, 26°; night, 17°; rain

3 August, sun

	753 mmHg		78%
	3.7 m/s

3 August, Sunday. day, 26°; night, 17°; rain

4 August, mon

	753 mmHg		77%
	3.5 m/s

4 August, Monday. day, 26°; night, 17°; partly cloudy

5 August, tue

	753 mmHg		75%
	3.7 m/s

5 August, Tuesday. day, 26°; night, 17°; clear

6 August, wed

	754 mmHg		73%
	3.9 m/s

6 August, Wednesday. day, 25°; night, 15°; clear

7 August, thu

	754 mmHg		76%
	3.6 m/s

7 August, Thursday. day, 25°; night, 16°; clear

8 August, fri

	753 mmHg		78%
	3.8 m/s

8 August, Friday. day, 26°; night, 16°; partly cloudy

9 August, sat

	753 mmHg		77%
	3.8 m/s

9 August, Saturday. day, 26°; night, 16°; rain

10 August, sun

	752 mmHg		76%
	3.7 m/s

10 August, Sunday. day, 26°; night, 17°; rain

11 August, mon

	752 mmHg		77%
	3.7 m/s

11 August, Monday. day, 25°; night, 16°; rain

12 August, tue

	753 mmHg		76%
	3.9 m/s

12 August, Tuesday. day, 25°; night, 16°; overcast

13 August, wed

	753 mmHg		78%
	3.5 m/s

13 August, Wednesday. day, 25°; night, 16°; rain

14 August, thu

	754 mmHg		76%
	3.4 m/s

14 August, Thursday. day, 25°; night, 16°; partly cloudy

15 August, fri

	754 mmHg		76%
	3.4 m/s

15 August, Friday. day, 26°; night, 16°; rain

16 August, sat

	754 mmHg		76%
	3.8 m/s

16 August, Saturday. day, 26°; night, 16°; rain

17 August, sun

	754 mmHg		77%
	3.9 m/s

17 August, Sunday. day, 25°; night, 16°; rain

18 August, mon

	753 mmHg		76%
	4.1 m/s

18 August, Monday. day, 25°; night, 16°; rain

19 August, tue

	754 mmHg		75%
	3.7 m/s

19 August, Tuesday. day, 24°; night, 15°; clear

20 August, wed

	755 mmHg		74%
	3.8 m/s

20 August, Wednesday. day, 25°; night, 14°; clear

21 August, thu

	754 mmHg		78%
	3.9 m/s

21 August, Thursday. day, 24°; night, 16°; rain

22 August, fri

	754 mmHg		77%
	4 m/s

22 August, Friday. day, 24°; night, 15°; overcast

23 August, sat

	754 mmHg		77%
	3.8 m/s

23 August, Saturday. day, 23°; night, 15°; partly cloudy

24 August, sun

	755 mmHg		75%
	3.7 m/s

24 August, Sunday. day, 25°; night, 15°; clear

25 August, mon

	755 mmHg		76%
	3.9 m/s

25 August, Monday. day, 25°; night, 15°; clear

26 August, tue

	755 mmHg		76%
	3.8 m/s

26 August, Tuesday. day, 24°; night, 15°; clear

27 August, wed

	755 mmHg		77%
	3.5 m/s

27 August, Wednesday. day, 24°; night, 15°; partly cloudy

28 August, thu

	755 mmHg		77%
	3.6 m/s

28 August, Thursday. day, 24°; night, 15°; partly cloudy

29 August, fri

	754 mmHg		79%
	4 m/s

29 August, Friday. day, 24°; night, 15°; overcast

30 August, sat

	754 mmHg		78%
	4.19 m/s

30 August, Saturday. day, 24°; night, 15°; partly cloudy

31 August, sun

	755 mmHg		77%
	4.19 m/s

31 August, Sunday. day, 23°; night, 15°; clear

1 September, mon

	756 mmHg		76%
	3.8 m/s

1 September, Monday. day, 24°; night, 14°; clear

2 September, tue

	756 mmHg		76%
	3.9 m/s

2 September, Tuesday. day, 23°; night, 14°; clear

3 September, wed

	754 mmHg		77%
	3.9 m/s

3 September, Wednesday. day, 24°; night, 14°; rain

4 September, thu

	754 mmHg		77%
	4.1 m/s

4 September, Thursday. day, 23°; night, 15°; clear

5 September, fri

	756 mmHg		74%
	4.1 m/s

5 September, Friday. day, 23°; night, 13°; clear

6 September, sat

	756 mmHg		77%
	3.8 m/s

6 September, Saturday. day, 23°; night, 13°; clear

Average data for 10 years

Cornwall August

9

sunny days

12

days with precipitation

6

cloudy days

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

76

%

air humidity

2.6

m/s

WindSW

110

mm of precipitation

(10% of annual average)

air humidity 76%; 110 millimeters of precipitation (10% of annual average); Wind south-westerly 2.6 Meters per second

Weather graphs for August

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

SW

SW

SW

S

SW

SW

SW

SW

S

SW

SW

S

SW

SW

S

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

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
Montreal
Colchester
Quebec
Brooklyn
Laval
Lake George
Berlin
Albany

Cities with similar weather in August

Lisbon
Vienna
Porto
Playa de las Americas
Lyon
Port Louis
Rogaška Slatina
Kabul
Adeje

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

In August, the weather in Cornwall is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Cornwall has 12 rainy, 9 sunny, 7 partly cloudy, and 3 cloudy days in August. The rains are usually heavy.

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