Basel Weather in May
Basel in May sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 9°C (48°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.
Rainfall in Basel in May
Since this month has the highest rainfall, keep an umbrella with you to handle sudden showers. On average, there are about 18 days with rain during this month, averaging 127 mm (5 in). This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Basel in May
Expect highs of 20°C (68°F) in Basel in May, with nights dropping to around 9°C (48°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Basel in May
The area enjoys a balanced 188 hours of sunlight, ensuring it's neither too overcast nor too sunny.If your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Basel.
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 Basel's climate page.
Basel Temperature in May
Min Temperature
9°C (48°F)
Max Temperature
20°C (68°F)
Chance of Rain
58%
Precipitation
127 mm (5 in)
Rainy days
18 days
Humidity
72%
Sunshine
188 hours
Percentage Sunshine
43%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Basel typically rise from around 17°C (63°F) at the start of May to approximately 21°C (70°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°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 Basel in May
Browse day-by-day weather records for Basel spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Basel historical weather extremes in May
Our historical data for Basel spans 1976 to 2026, revealing these weather extremes.
- The hottest May day on record in Basel reached 33°C (91°F) (May 26, 2026).
- Basel experienced its chilliest May day on May 4, 1987, reaching only 6°C (43°F).
- The coldest night in May in Basel was on May 5, 1979, with a minimum of -2°C (28°F).
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 →
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What to Wear in Basel 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. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Basel 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 Basel's climate page.
Temperature Rainfall Sunshine Humidity
See the full Basel climate overview or explore weather in Switzerland.
