Ascona Weather in May
During May, Ascona experiences moderate daytime temperatures of 18°C (64°F) and cooler nights around 8°C (46°F). Expect quite a bit of rainfall. Around 173 mm (6.8 in) is typical.
Rainfall in Ascona in May
On average, there are about 19 days with rain during this month, averaging 173 mm (6.8 in). This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Ascona in May
If you're visiting Ascona in May, expect highs of 18°C (64°F) and overnight lows around 8°C (46°F). Conditions are often most pleasant around the middle of the day. Nights drop to 8°C (46°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Ascona in May
The city usually sees around 211 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in Ascona in May
May has wind speeds averaging 1 m/s (2 knots). You can expect very gentle conditions with light air movement on typical days. Since this is an average, daily weather varies from perfectly still moments to some breezier days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Ascona.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Ascona's climate page.
Ascona Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
18°C (64°F)
Chance of Rain
62%
Precipitation
173 mm (6.8 in)
Rainy days
19 days
Humidity
66% *
Windspeed
1 m/s (2 knots) *
Sunshine
211 hours *
Percentage Sunshine
47% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ascona typically rise from around 18°C (64°F) at the start of May to approximately 22°C (72°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in May
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 May
Historical weather for Ascona in May
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.
Ascona historical weather extremes in May
Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Ascona.
- Ascona recorded its highest May temperature of 33°C (91°F) on May 28, 2026.
- On May 5, 2002, Ascona saw its coldest May day with temperatures maxing out at 7°C (45°F).
- Nighttime temperatures dropped to -7°C (19°F) on May 4, 1979, marking the coldest May night on record.
Best Places in Switzerland in May
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Ascona in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Ascona in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Ascona's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Ascona climate overview or explore weather in Switzerland.
