Sion Weather in August

August in Sion sees daytime temperatures around 19°C (66°F) and lows of 7°C (45°F) at night. With around 153 mm (6 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Sion in August

Rain is expected on roughly 17 days, totalling around 153 mm (6 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Sion in August

Daytime highs in Sion in August reach 19°C (66°F), with nights around 7°C (45°F). August is part of the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Sion in August

The month enjoys around 248 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Sion in August

August sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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• January
• February
• March
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• May
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• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Switzerland, check out our Sion's climate page.

Sion Temperature in August

Min Temperature 7°C (45°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 56%  

Precipitation 153 mm (6 in)  

Rainy days 17 days  

Humidity 67%  

Windspeed 2 m/s (4 knots)  

Sunshine 248 hours  

Percentage Sunshine 65%  

What to Wear in Sion in August

Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Sion in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Camping

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Switzerland, check out our Sion's climate page.

More climate data for Sion

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Sion climate overview or explore weather in Switzerland.