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August weather forecast in Sion

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

	654 mmHg		75%
	1.7 m/s

27 July, Sunday. day, 19°; night, 8°; partly cloudy

28 July, mon

	654 mmHg		80%
	1.8 m/s

28 July, Monday. day, 18°; night, 9°; rain

29 July, tue

	654 mmHg		79%
	1.7 m/s

29 July, Tuesday. day, 18°; night, 8°; rain

30 July, wed

	655 mmHg		76%
	1.8 m/s

30 July, Wednesday. day, 19°; night, 8°; clear

31 July, thu

	654 mmHg		76%
	1.7 m/s

31 July, Thursday. day, 19°; night, 8°; clear

1 August, fri

	654 mmHg		77%
	1.7 m/s

1 August, Friday. day, 19°; night, 7°; rain

2 August, sat

	654 mmHg		78%
	1.7 m/s

2 August, Saturday. day, 19°; night, 8°; rain

3 August, sun

	654 mmHg		81%
	1.7 m/s

3 August, Sunday. day, 17°; night, 8°; rain

4 August, mon

	654 mmHg		78%
	1.7 m/s

4 August, Monday. day, 18°; night, 7°; rain

5 August, tue

	654 mmHg		78%
	1.6 m/s

5 August, Tuesday. day, 18°; night, 8°; rain

6 August, wed

	654 mmHg		79%
	1.7 m/s

6 August, Wednesday. day, 18°; night, 8°; rain

7 August, thu

	654 mmHg		79%
	1.6 m/s

7 August, Thursday. day, 18°; night, 7°; rain

8 August, fri

	654 mmHg		78%
	1.7 m/s

8 August, Friday. day, 18°; night, 7°; partly cloudy

9 August, sat

	654 mmHg		77%
	1.7 m/s

9 August, Saturday. day, 18°; night, 7°; partly cloudy

10 August, sun

	654 mmHg		77%
	1.6 m/s

10 August, Sunday. day, 18°; night, 7°; partly cloudy

11 August, mon

	655 mmHg		77%
	1.6 m/s

11 August, Monday. day, 18°; night, 7°; clear

12 August, tue

	654 mmHg		76%
	1.6 m/s

12 August, Tuesday. day, 18°; night, 7°; rain

13 August, wed

	654 mmHg		77%
	1.7 m/s

13 August, Wednesday. day, 18°; night, 8°; rain

14 August, thu

	654 mmHg		78%
	1.7 m/s

14 August, Thursday. day, 17°; night, 7°; rain

15 August, fri

	654 mmHg		77%
	1.7 m/s

15 August, Friday. day, 18°; night, 7°; rain

16 August, sat

	654 mmHg		77%
	1.6 m/s

16 August, Saturday. day, 18°; night, 7°; partly cloudy

17 August, sun

	653 mmHg		77%
	1.7 m/s

17 August, Sunday. day, 18°; night, 7°; rain

18 August, mon

	653 mmHg		76%
	1.6 m/s

18 August, Monday. day, 19°; night, 7°; clear

19 August, tue

	654 mmHg		78%
	1.6 m/s

19 August, Tuesday. day, 18°; night, 8°; rain

20 August, wed

	655 mmHg		79%
	1.6 m/s

20 August, Wednesday. day, 17°; night, 8°; rain

21 August, thu

	655 mmHg		77%
	1.7 m/s

21 August, Thursday. day, 18°; night, 7°; clear

22 August, fri

	655 mmHg		76%
	1.6 m/s

22 August, Friday. day, 18°; night, 7°; clear

23 August, sat

	654 mmHg		75%
	1.6 m/s

23 August, Saturday. day, 19°; night, 7°; clear

24 August, sun

	654 mmHg		78%
	1.6 m/s

24 August, Sunday. day, 18°; night, 7°; rain

25 August, mon

	654 mmHg		77%
	1.7 m/s

25 August, Monday. day, 18°; night, 7°; partly cloudy

26 August, tue

	654 mmHg		78%
	1.6 m/s

26 August, Tuesday. day, 17°; night, 7°; partly cloudy

27 August, wed

	654 mmHg		79%
	1.6 m/s

27 August, Wednesday. day, 17°; night, 7°; rain

28 August, thu

	653 mmHg		80%
	1.7 m/s

28 August, Thursday. day, 16°; night, 6°; partly cloudy

29 August, fri

	653 mmHg		80%
	1.7 m/s

29 August, Friday. day, 16°; night, 6°; overcast

30 August, sat

	654 mmHg		82%
	1.6 m/s

30 August, Saturday. day, 15°; night, 5°; rain

31 August, sun

	654 mmHg		80%
	1.7 m/s

31 August, Sunday. day, 15°; night, 5°; overcast

1 September, mon

	654 mmHg		80%
	1.6 m/s

1 September, Monday. day, 15°; night, 5°; rain

2 September, tue

	654 mmHg		79%
	1.6 m/s

2 September, Tuesday. day, 16°; night, 6°; partly cloudy

3 September, wed

	654 mmHg		78%
	1.7 m/s

3 September, Wednesday. day, 16°; night, 6°; partly cloudy

4 September, thu

	654 mmHg		79%
	1.6 m/s

4 September, Thursday. day, 16°; night, 5°; rain

5 September, fri

	654 mmHg		79%
	1.7 m/s

5 September, Friday. day, 15°; night, 5°; partly cloudy

6 September, sat

	654 mmHg		77%
	1.6 m/s

6 September, Saturday. day, 16°; night, 5°; clear

Average data for 10 years

Sion August

5

sunny days

17

days with precipitation

7

cloudy days

5 sunny days; 17 days with precipitation; 7 cloudy days;

78

%

air humidity

1

m/s

WindSW

176

mm of precipitation

(11% of annual average)

air humidity 78%; 176 millimeters of precipitation (11% of annual average); Wind south-westerly 1 Meters per second

Weather graphs for August

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

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

Milan
Nice
Marseilles
Zurich
Geneva
Bern
Monaco
Genoa
Stuttgart

Cities with similar weather in August

Cholpon-Ata
Sydney
Dublin
Auckland
Capetown
Gudauri
Edinburgh
Bergen
Antananarivo

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

In August, the weather in Sion is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Sion has 17 rainy, 7 partly cloudy, 5 sunny, and 2 cloudy days in August. The rains are usually heavy. August as well as April, May, June, and July is considered the most uncomfortable time to visit Sion.

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