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Best Time for Slovenia's Karst & Coast
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Sweet spot: March, April, June. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- Cave temperatures never change but the queues do — shoulder season halves them; the saltpans harvest through summer and Piran's seafood keeps its local prices.
- Slovenia's forty kilometres of coast work hard in high summer — sleep in Piran itself and the day-trip tide recedes by evening.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | −2.7°C | 3.4°C | 63 mm | 8.9 h | ❄ |
| February | −2.3°C | 4.9°C | 75 mm | 10.1 h | ❄ |
| March | 0.8°C | 9.6°C | 71 mm | 11.6 h | ❄ |
| April | 5.1°C | 14.8°C | 72 mm | 13.3 h | |
| May | 9.6°C | 19.3°C | 94 mm | 14.7 h | |
| June | 14.0°C | 23.5°C | 83 mm | 15.5 h | |
| July | 16.1°C | 26.0°C | 75 mm | 15.2 h | |
| August | 15.6°C | 26.0°C | 89 mm | 13.9 h | |
| September | 11.0°C | 20.6°C | 116 mm | 12.3 h | |
| October | 6.9°C | 15.3°C | 103 mm | 10.7 h | |
| November | 3.2°C | 9.6°C | 114 mm | 9.2 h | |
| December | −1.3°C | 4.8°C | 89 mm | 8.5 h | ❄ |