SeasonMapPiran weather in May
Slovenia
May in Piran: nice, rainy, with clean air — a great time to visit.
#5 of 12 months in Piran · #889 of 1383 destinations to visit in May · comfort 76/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Piran in May
No notes yet. Open Piran on the map to add the first one.
Piran climate normals — May
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 22°C / 72°F | |
| Sea temperature | 17°C / 63°F | 🧊 bracing |
| Rainfall | 127 mm / 5 in | 🌧 rainy |
| Rainy days | 15 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 11.6 h/day | |
| Daylight | 14.9 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Piran in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyDay-tripper hours, school holidays in 4 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Piran's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherPiran's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Piran in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Secovlje salt harvest
23 Apr – 15 Sep · usuallyThe salt pans south of town are still worked by hand from St George's Day through the summer, raked into white ridges on the same beds used for six hundred years. Out of season it is a birdwatching marsh instead. Source ↗
- Season
Day-tripper hours
15 May – 20 Sep · usuallyDay-tripper crushCrowdedCars stop at the Fornace car park and everyone arrives on the shuttle, so the old town fills between about ten and five and empties completely after. Stay the night and Tartini Square is yours. Source ↗
Nearby, and something's on
Within 300 km of Piran — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Piran?
Piran in May — FAQ
- Is May a good time to visit Piran?
- May in Piran: nice, rainy, with clean air — a great time to visit. It ranks #5 of 12 months for Piran on SeasonMap's comfort score (76/100).
- What is the weather like in Piran in May?
- In May, Piran averages a daily high of 21.1°C and a low of 15.8°C, with about 127.2 mm of rain over roughly 15.3 rainy days.
- What is the air quality in Piran in May?
- Piran has a mean US Air Quality Index of about 50 in May.
Other months in Piran
Compare Piran in May
Warmer or cooler than Piran in May
Similar destinations in Central Europe — May
Within 300 km: Ljubljana's Open Kitchen food market around 15 Mar – 31 Oct, and Venice's Biennale on 9 May – 22 Nov.