Slovenia
Slovenia · Europe
The best time to visit Slovenia is June and July. In summer, daytime highs average 28°C (82°F), with peaks around 34°C (93°F); in winter, nights average -3°C (27°F), dropping to around -10°C (14°F) on the coldest. All climate data are based on historical monthly averages (2005–2025) to help you plan the optimal travel time.
Slovenia – What you should know
Slovenia is small but climatically varied: the Julian Alps with Triglav, the hills around Ljubljana and the short Adriatic coast at Piran lie only a few hours apart by car. The figures here describe the centre of the country. In July daytime highs average 28°C (82°F), 34°C (93°F) on the hottest days, with nights at 15°C (59°F) — around Bled and Bohinj in the Alpine foothills it is noticeably cooler.
June and July are the sunniest months (eight hours a day) with moderate rain of 104 and 110 mm (4.1 and 4.3 in) over eight days each. August is somewhat wetter at 127 mm (5.0 in). September stands out at 176 mm (6.9 in), the wettest month of the year, even though daytime highs of 22°C (72°F) remain pleasant. For hiking in the Julian Alps and along the Soča, June and July are the most reliable time.
Winter is grey: from November to January the sun shines only 1.3–1.5 hours a day; in January daytime highs are 4°C (39°F), nights -3°C (27°F), around -10°C (14°F) on the coldest nights. Winter visitors should have Ljubljana or the Postojna caves in mind, not the Alpine valleys. October, at 16°C (61°F) by day and 107 mm (4.2 in), is still workable for a city trip.
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 5° (41°)-3– (27–)12 (54) | 7° (45°)-1– (30–)15 (59) | 12° (54°)3– (37–)21 (70) | 17° (63°)7– (45–)25 (77) | 21° (70°)12– (54–)29 (84) | 26° (79°)17– (63–)33 (91) | 28° (82°)19– (66–)34 (93) | 28° (82°)19– (66–)34 (93) | 22° (72°)13– (55–)30 (86) | 17° (63°)8– (46–)23 (73) | 10° (50°)2– (36–)18 (64) | 5° (41°)-2– (28–)13 (55) |
Ø night, range from coldest to warmest nightØ nightrange | -3° (27°)-10– (14–)5 (41) | -1° (30°)-9– (16–)5 (41) | 1° (34°)-6– (21–)8 (46) | 5° (41°)-2– (28–)12 (54) | 10° (50°)4– (39–)15 (59) | 14° (57°)9– (48–)19 (66) | 16° (61°)10– (50–)20 (68) | 15° (59°)8– (46–)20 (68) | 11° (52°)4– (39–)17 (63) | 7° (45°)-1– (30–)14 (57) | 3° (37°)-4– (25–)10 (50) | -1° (30°)-8– (18–)5 (41) |
☀️Sunshine | 2h UV 2 | 3h UV 3 | 6h UV 5 | 7h UV 7 | 7h UV 7 | 8h UV 8 | 8h UV 8 | 8h UV 7 | 6h UV 6 | 4h UV 4 | 2h UV 2 | 2h UV 2 |
🌧Rain Days | 6d70mm (2.8") | 7d84mm (3.3") | 6d81mm (3.2") | 7d89mm (3.5") | 9d122mm (4.8") | 8d104mm (4.1") | 8d110mm (4.3") | 7d127mm (5.0") | 8d176mm (6.9") | 6d107mm (4.2") | 8d121mm (4.8") | 7d105mm (4.1") |
Best travel timeØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Travel Tips
In July, UV levels in Slovenia reach 8 — very high on the WHO scale. High-SPF sunscreen and shade around midday are essential.
April offers great weather in Slovenia with fewer tourists and lower prices — ideal for those who want to avoid the peak season crowds.
The travel year in Slovenia
December – February
Slovenia in winter is grey but cosy: Ljubljana glows in Advent, the cafés along the river are full and snow lies in the Alpine valleys. Sunshine is rare, but prices are low and the sights are empty.
March – May
Spring brings blossom, strong greens and cool mornings. In the Julian Alps snow lies for a long time above 1,500 metres (4,921 ft), while in Ljubljana people already sit outdoors. Showers become frequent in May — which is when the waterfalls carry the most water.
June – August
Summer in Slovenia means water: Lake Bled, Bohinj, the Soča and the Adriatic coast at Piran invite swimming, paddling and rafting. The days are long and sunny, the evenings warm. Around Bled it is busy at weekends, but away from the hotspots it stays quiet.
September – November
September can be wet, yet it stays mild in between and the grape harvest begins. In October the country turns colourful and mushroom and chestnut season starts. In November the sun sits low and fog lies over the Ljubljana basin.
Events & Festivals
February
- Kurentovanje· variable (February, until Shrove Tuesday)
Slovenia's largest carnival in Ptuj: the Kurenti, dressed in shaggy sheepskins with cowbells on their belts, are meant to drive out winter.
March
- Planica Ski Flying World Cup Final· late March
Season finale of the Ski Jumping World Cup on the ski-flying hill in the Planica valley near Kranjska Gora, watched by tens of thousands of spectators.
July
- Ljubljana Festival· late June to early September
Concerts, opera and ballet at venues across the capital throughout the summer.
September
- Kravji bal (Cow Ball)· a Sunday in the second half of September
Festival marking the cattle drive in Ukanc on Lake Bohinj: herders bring the decorated cattle down from the high pastures, with folk music and regional food.
Frequently Asked Questions
- When is the best time to visit Slovenia?
- The best time to visit Slovenia is June and July. These months offer the most favourable combination of sunshine, temperatures, and low rainfall.
- How warm does it get in Slovenia?
- In summer, daytime highs in Slovenia average 28°C (82°F), with peaks around 34°C (93°F); in winter, nights average -3°C (27°F), dropping to around -10°C (14°F) on the coldest.
- How much rain does Slovenia get?
- Slovenia has a relatively even rainfall pattern with an average of 7 rain days per month. The driest months are January, February, and March.
Best Travel Time by Vacation Type
🏙️
City Trip
Pleasantly mild, not too hot
JunJulAug
