When to go · Slovenia
Slovenia in May
Great month. Green valleys, cave visits without queues; high trails still snowy.
Key facts
- Verdict
- Great
- Crowds
- Medium
- Slovenia
- Prices
- Medium
- Slovenia
Verdict
Green valleys, cave visits without queues; high trails still snowy.
Is another month better than May?
No other month rates higher than May for Slovenia in this guide.
Weather in May
- Ljubljana and the centre · Ljubljana, Škofja Loka, Mariborbest weather
Continental: foggy winters in the Ljubljana basin, warm summers with storms.
- Julian Alps · Bled, Bohinj, Kranjska Gora, Bovecfine
Snow December–March; hiking June–September; the Soča side is among the wettest places in Europe in autumn.
- Karst and coast · Piran, Izola, Koper, Lipicabest weather
Mediterranean; the bora wind blasts the Karst in winter; sea swimming June–September.
- Coast and Karst: Coast (Koper, Izola, Piran, Portorož) · Adriatic shorebest weather
Mediterranean; sea swimming roughly May–October, warmest Jul–Aug. Bora wind can blow cold in winter.
- Coast and Karst: Karst plateau (Postojna, Divača, Sežana) · Inland limestonebest weather
Caves stay about 8–12 °C (46–54 °F) all year; the plateau is cooler and windier than the coast.Caves stay about 46–54 °F (8–12 °C) all year; the plateau is cooler and windier than the coast.
- Eastern Slovenia: Maribor / Ptuj · Drava valleybest weather
Continental: warm summers, cold winters, rain spread through the year.
- Eastern Slovenia: Prekmurje · Mura plainbest weather
Slightly drier and flatter; fog can sit for days in late autumn and winter.
- Julian Alps: Julian Alps · Bled, Bohinj, Soča valley, Kranjska Gorabest weather
Valley summers are mild; afternoon thunderstorms June–August. Snow closes high passes in winter — check local conditions and seasonal closures before driving up a valley.
- Pohorje-Savinjska: Pohorje plateau · Ridge above 1,000 m, west and east of the summitbest weather
Cooler and wetter than the valleys; snow cover on the ridge typically December to March, and the ski season depends on it.
- Pohorje-Savinjska: Savinja valley and Celje basin · Celje, Laško, Slovenske Konjice, Slovenj Gradecbest weather
Valley heat in July and August; afternoon thunderstorms are common in summer.
- Southeastern Slovenia: Novo Mesto / Brežice · Krka and Sava valleysbest weather
Continental valley climate: warm summers, cold winters with snow; spring and autumn are the pick. Check current forecasts before travelling.
- Ljubljana21 °C (70 °F) / 10 °C (50 °F), 14 rain days70 °F (21 °C) / 50 °F (10 °C), 14 rain days
- Bled20 °C (68 °F) / 8 °C (46 °F), 12 rain days68 °F (20 °C) / 46 °F (8 °C), 12 rain days
- Bovec18 °C (64 °F) / 7 °C (45 °F), 14 rain days64 °F (18 °C) / 45 °F (7 °C), 14 rain days
- Brežice22 °C (72 °F) / 10 °C (50 °F), 12 rain days72 °F (22 °C) / 50 °F (10 °C), 12 rain days
- Celje22 °C (72 °F) / 12 °C (54 °F), 11 rain days72 °F (22 °C) / 54 °F (12 °C), 11 rain days
- Divača23 °C (73 °F) / 12 °C (54 °F), 7 rain days73 °F (23 °C) / 54 °F (12 °C), 7 rain days
- Dovje-Mojstrana18 °C (64 °F) / 7 °C (45 °F), 13 rain days64 °F (18 °C) / 45 °F (7 °C), 13 rain days
- Grosuplje21 °C (70 °F) / 11 °C (52 °F), 5 rain days70 °F (21 °C) / 52 °F (11 °C), 5 rain days
- Idrija20 °C (68 °F) / 10 °C (50 °F), 10 rain days68 °F (20 °C) / 50 °F (10 °C), 10 rain days
- Izola23 °C (73 °F) / 13 °C (55 °F), 8 rain days73 °F (23 °C) / 55 °F (13 °C), 8 rain days
- Jesenice20 °C (68 °F) / 8 °C (46 °F), 13 rain days68 °F (20 °C) / 46 °F (8 °C), 13 rain days
- Jezersko21 °C (70 °F) / 12 °C (54 °F), 8 rain days70 °F (21 °C) / 54 °F (12 °C), 8 rain days
- Kamnik21 °C (70 °F) / 9 °C (48 °F), 12 rain days70 °F (21 °C) / 48 °F (9 °C), 12 rain days
- Kobarid20 °C (68 °F) / 10 °C (50 °F), 12 rain days68 °F (20 °C) / 50 °F (10 °C), 12 rain days
- Koper23 °C (73 °F) / 13 °C (55 °F), 10 rain days73 °F (23 °C) / 55 °F (13 °C), 10 rain days
- Kranj22 °C (72 °F) / 11 °C (52 °F), 7 rain days72 °F (22 °C) / 52 °F (11 °C), 7 rain days
- Kranjska Gora19 °C (66 °F) / 8 °C (46 °F), 12 rain days66 °F (19 °C) / 46 °F (8 °C), 12 rain days
- Lendava22 °C (72 °F) / 12 °C (54 °F), 7 rain days72 °F (22 °C) / 54 °F (12 °C), 7 rain days
- Lipica22 °C (72 °F) / 13 °C (55 °F), 9 rain days72 °F (22 °C) / 55 °F (13 °C), 9 rain days
- Maribor22 °C (72 °F) / 10 °C (50 °F), 12 rain days72 °F (22 °C) / 50 °F (10 °C), 12 rain days
- Murska Sobota22 °C (72 °F) / 11 °C (52 °F), 9 rain days72 °F (22 °C) / 52 °F (11 °C), 9 rain days
- Nova Gorica21 °C (70 °F) / 12 °C (54 °F), 4 rain days70 °F (21 °C) / 54 °F (12 °C), 4 rain days
- Novo Mesto22 °C (72 °F) / 11 °C (52 °F), 9 rain days72 °F (22 °C) / 52 °F (11 °C), 9 rain days
- Piran22 °C (72 °F) / 13 °C (55 °F), 9 rain days72 °F (22 °C) / 55 °F (13 °C), 9 rain days
- Portorož23 °C (73 °F) / 13 °C (55 °F), 4 rain days73 °F (23 °C) / 55 °F (13 °C), 4 rain days
- Postojna20 °C (68 °F) / 12 °C (54 °F), 7 rain days68 °F (20 °C) / 54 °F (12 °C), 7 rain days
- Ptuj21 °C (70 °F) / 11 °C (52 °F), 9 rain days70 °F (21 °C) / 52 °F (11 °C), 9 rain days
- Ribnica21 °C (70 °F) / 9 °C (48 °F), 11 rain days70 °F (21 °C) / 48 °F (9 °C), 11 rain days
- Sevnica22 °C (72 °F) / 11 °C (52 °F), 11 rain days72 °F (22 °C) / 52 °F (11 °C), 11 rain days
- Sežana22 °C (72 °F) / 12 °C (54 °F), 9 rain days72 °F (22 °C) / 54 °F (12 °C), 9 rain days
- Škofja Loka21 °C (70 °F) / 10 °C (50 °F), 13 rain days70 °F (21 °C) / 50 °F (10 °C), 13 rain days
- Slovenj Gradec20 °C (68 °F) / 8 °C (46 °F), 12 rain days68 °F (20 °C) / 46 °F (8 °C), 12 rain days
- Srednja Dobrava20 °C (68 °F) / 11 °C (52 °F), 9 rain days68 °F (20 °C) / 52 °F (11 °C), 9 rain days
- Tolmin22 °C (72 °F) / 12 °C (54 °F), 6 rain days72 °F (22 °C) / 54 °F (12 °C), 6 rain days
- Trbovlje22 °C (72 °F) / 10 °C (50 °F), 12 rain days72 °F (22 °C) / 50 °F (10 °C), 12 rain days
- Uskovnica16 °C (61 °F) / 7 °C (45 °F), 11 rain days61 °F (16 °C) / 45 °F (7 °C), 11 rain days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Day of Uprising, Labour Day
27 Apr, 1–2 May
A long spring break; bonfires on 30 April; coast busy.
Crowds and prices
- Crowds · Slovenia
- Medium
- Prices · Slovenia
- Medium
Compare two months
Weather, crowds and prices for any two months in Slovenia, side by side.
Verdict
May: Great
Jun: Great
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: Medium
Festivals listed
May: 1
Jun: 2
May: Green valleys, cave visits without queues; high trails still snowy.
June: Excellent: long days, open passes, sea warming.
Slovenia: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.
Where to go in May
Rated best or good this month
Ljubljana and the centre
Best weather of the year (Ljubljana, Škofja Loka, Maribor)
Karst and coast
Best weather of the year (Piran, Izola, Koper, Lipica)
Warm and green; long days.
Best months: May–Jun, Sep
Best months: May–Sep
Best months: May–Sep
Best months: May–Sep
Best months: May–September
Best months: May–Sep
Best months: May–Sep
Best months: May–Sep
Best months: May–Jun, Sep–Oct