Ascona Weather in August

Ascona in August sees high temperatures, with highs around 23°C (73°F) and overnight lows of 13°C (55°F). With the rainy season in full effect, expect around 171 mm (6.7 in) of rainfall and regular showers throughout the month.

Rainfall in Ascona in August

Ascona is in the rainy season in August, with rain on around 17 days and an average of 171 mm (6.7 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Ascona in August

Ascona in August gets highs of 23°C (73°F) during the day and drops to 13°C (55°F) at night. August is part of the summer season. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Ascona in August

Expect a lot of sunshine this month, with about 249 hours of sun. Showers typically arrive in the late afternoon or evening, keeping mornings and early afternoons sunny. Even during the wet season, there's plenty of sunshine for sightseeing.

Wind Speed in Ascona in August

Average wind conditions reach 1 m/s (2 knots) in August. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.

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

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Ascona Temperature in August

Min Temperature 13°C (55°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 55%  

Precipitation 171 mm (6.7 in)  

Rainy days 17 days  

Humidity 68% *  

Windspeed 1 m/s (2 knots) *  

Sunshine 249 hours *  

Percentage Sunshine 62% *  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Ascona typically drop from around 28°C (82°F) at the start of August to approximately 25°C (77°F) by the end. Nights are pleasant, with lows typically ranging from 14°C (57°F) to 17°C (63°F).

Average temperatures in August

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in August

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Historical weather for Ascona in August

Browse day-by-day weather records for Ascona spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Ascona historical weather extremes in August

Based on 49 years of weather observations in Ascona between 1976 and 2025, these are the recorded extremes.

• On August 11, 2003, temperatures climbed to 37°C (99°F), marking the warmest August day on record.
• The coldest August day was on August 21, 2007, with a maximum of 13°C (55°F).
• The coldest night in August in Ascona was on August 24, 1977, with a minimum of 2°C (36°F).

What to Wear in Ascona in August

For Ascona in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Ascona in August

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

Swimming

7/10

Camping

6/10

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 Ascona's climate page.

More climate data for Ascona

Temperature Rainfall Sunshine Humidity Wind Speed

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