UV Index
UV Index
Today's UV index in Piran, Slovenia 
will be up to 6.6, indicating a high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-21
With Piran's UV index reaching 6.6, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.
Piran, Slovenia, often has a UV index ranging from moderate to high during summer, typically between 5 and 8. In winter, the UV index is lower, usually around 1 to 3. Spring and autumn see moderate levels, about 3 to 5.
Piran experiences warm, sunny summers and mild, rainy winters. Spring and autumn are transitional seasons with moderate temperatures and some rainfall. The Mediterranean climate brings dry summers and wetter winters, with the warmest months in July and August.
Compared to the wider Slovenia region, Piran is milder and sunnier because it sits on the coast. Neighboring Italy’s coastal cities have similar weather, but Piran is generally a bit cooler in summer and warmer in winter than inland areas of Slovenia.
See the UV index hour by hour for Piran, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.