Ollon Weather in May
Ollon in May sees moderate temperatures, with highs around 15°C (59°F) and overnight lows of 4°C (39°F). With the rainy season in full effect, expect around 193 mm (7.6 in) of rainfall and regular showers throughout the month.
Rainfall in Ollon in May
As part of the rainy season, Ollon sees around 19 days of rain in May, with an average of 193 mm (7.6 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Ollon in May
If you're visiting Ollon in May, expect highs of 15°C (59°F) and overnight lows around 4°C (39°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Ollon in May
Expect sunny days throughout the month, with an estimated 230 hours of sunshine. Despite being the rainy season, it could still be a nice time to visit. Rain often arrives later in the day, keeping most of the days sunny.May in Ollon can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
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 Ollon's climate page.
Ollon Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
15°C (59°F)
Chance of Rain
62%
Precipitation
193 mm (7.6 in)
Rainy days
19 days
Humidity
62% *
Sunshine
230 hours *
Percentage Sunshine
56% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ollon typically rise from around 17°C (63°F) at the start of May to approximately 20°C (68°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°F) to 11°C (52°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 Ollon in May
Browse day-by-day weather records for Ollon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ollon historical weather extremes in May
Based on 49 years of weather observations in Ollon between 1976 and 2025, these are the recorded extremes.
- The hottest May day on record in Ollon reached 29°C (84°F) (May 24, 2009).
- On May 4, 2002, Ollon saw its coldest May day with temperatures maxing out at 6°C (43°F).
- The heaviest May precipitation occurred on May 1, 2015, when 50 mm (2 in) of precipitation fell.
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 Ollon in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Ollon 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 Ollon's climate page.
Temperature Rainfall Sunshine Humidity
See the full Ollon climate overview or explore weather in Switzerland.
