SeasonMapPiran weather by month
Slovenia
The best time to visit Piran is June to August — 93/100 in July, 29°C and 8 rainy days. The best season is summer, June to August (90/100 on average).
The worst month is January at 47/100 — cold, rainy, clean air. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Slovenia →
Piran, month by month
Comfort score out of 100 for the kind of trip Piran is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
| Month | Score | Tier | High | Rain | Sun | Crowds | On |
|---|---|---|---|---|---|---|---|
| JanJanuary | 47 | F | 10°C | 10 d | 6 h | Quiet | 1 |
| FebFebruary | 53 | D | 11°C | 9 d | 7 h | Quiet | 1 |
| MarMarch | 66 | C | 13°C | 11 d | 9 h | Shoulder | 1 |
| AprApril | 73 | B | 17°C | 10 d | 11 h | Shoulder | 1 |
| MayMay | 76 | B | 21°C | 15 d | 12 h | Busy | 2 |
| JunJune | 88 | A | 27°C | 9 d | 13 h | Busy | 3 |
| JulJuly | 93 | S | 29°C | 8 d | 13 h | Peak | 3 |
| AugAugust | 90 | S | 29°C | 7 d | 12 h | Busy | 4 |
| SepSeptember | 82 | A | 25°C | 11 d | 10 h | Busy | 4 |
| OctOctober | 71 | B | 20°C | 11 d | 8 h | Shoulder | — |
| NovNovember | 55 | D | 16°C | 13 d | 6 h | Shoulder | 1 |
| DecDecember | 49 | F | 12°C | 10 d | 5 h | Quiet | 1 |
What's on in Piran through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Piran in July
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.
Peak crowdstravelers describe it as peak season, Day-tripper hours, school holidays in 7 of the markets that fill it
Sourced from traveler notes: “…ng back to sun quickly after a storm passes. July counts as peak season alongside August, so warm, mostly sunny days come paired wi…” — Tripadvisor community
Peak crowdsBusyShoulder seasonQuiet