Slovenia weather by month: Alps, lakes and coast
Here is Slovenia's weather month by month for the Alps, the lakes and the coast.
Slovenia sits where the Alps, the Pannonian plain and the Mediterranean meet. Ljubljana and Bled have a continental climate with warm summers and cold winters, the Julian Alps are snowy for half the year, and the 47 kilometres of coast around Piran are Mediterranean.
Slovenia weather month by month
- December to February: Cold, often around 0 to 5 °C in Ljubljana, with fog in the basins and snow in the mountains. Ski season at Kranjska Gora and Vogel.
- March and April: Changeable spring, 10 to 17 °C. Waterfalls are at their fullest with melting snow.
- May and June: Green and pleasant, 20 to 26 °C. Good for cycling, the Soča valley and city walks. Expect afternoon showers.
- July and August: Warm, 26 to 30 °C, with thunderstorms in the Alps. Lake Bled and Lake Bohinj reach about 22 to 24 °C. The high mountain trails are open.
- September: Stable weather, fewer visitors and the best month for hiking Triglav National Park.
- October and November: Autumn colours in October, then rain and fog in November.
Best time to visit Slovenia
For lakes and hiking, June to September. For sightseeing without crowds, May and late September. For skiing and Advent in Ljubljana, December to February. The coast at Piran is pleasant from May to October, with swimming from June.
What to pack for Slovenia
- A rain jacket in every season: mountain weather changes fast.
- Proper hiking shoes if you plan to leave the lake paths.
Slovenia travel FAQ
Can you swim in Lake Bled?
Yes, from about late June to early September, when the water reaches 20 to 24 °C.
When is the best time to hike in Slovenia?
June to September for high mountain trails, with September usually the most stable month.
Does Slovenia get snow?
Yes. The Julian Alps are snowy from December to March and there are several ski resorts.
Find stays in Ljubljana, Bled and on the coast in our Slovenia guide.
