Piran Weather in May
May is one of the perfect months to visit Piran, with daytime temperatures of 21°C (70°F) and lows of 16°C (61°F) at night. Do note that quite a bit of rainfall is typical, averaging around 93 mm (3.7 in).
Rainfall in Piran in May
Climate statistics over the past 30 years suggest around 14 days of rain, with 93 mm (3.7 in) average for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Piran in May
Piran has perfect weather in May, with days reaching 21°C (70°F) and nights cooling to 16°C (61°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows of 16°C (61°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Piran in May
The days are predominantly sunny, with an estimated total of around 256 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit Piran.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Piran's climate page.
Piran Temperature in May
Min Temperature
16°C (61°F)
Max Temperature
21°C (70°F)
Chance of Rain
46%
Precipitation
93 mm (3.7 in)
Rainy days
14 days
Humidity
54% *
Sunshine
256 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Piran typically rise from around 20°C (68°F) at the start of May to approximately 24°C (75°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 14°C (57°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 Piran in May
Browse day-by-day weather records for Piran spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Piran historical weather extremes in May
Based on weather observations in Piran between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 29, 2008, with a maximum of 33°C (91°F).
- The coldest May day was on May 4, 1981, with a maximum of 10°C (50°F).
- Piran registered its coldest May night on May 6, 1981, with temperatures dropping to 3°C (37°F).
Best Places in Slovenia in May
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in May →
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What to Wear in Piran in May
For Piran in May, 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Piran 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 Slovenia, check out our Piran's climate page.
Temperature Rainfall Sunshine Humidity
See the full Piran climate overview or explore weather in Slovenia.
