Slovenia’s an absolute European gem. That much is obvious. Simply glance at the picture-perfect turquoise waters of Lake Bled or dream of the riverside charms of Ljubljana Old Town, and you’ll become immediately inspired to book a ticket over to the small heart of Central Europe.
Before you nail down your Slovenia itinerary, you’ll need to choose the best time to visit Slovenia. Every season presents a different facet of one of Europe’s most beautiful countries. Not all are perfect for every traveller.
Align your Slovenia travel dreams with the realities of ever-unpredictable Central European weather by following along with this Slovenia weather guide for travellers:
Table of Contents
- Overview of Weather in Slovenia
- Slovenia Weather By Season
- Slovenia Weather By Month
- The Verdict: When is the Best Time to Visit Slovenia?
Overview of Weather in Slovenia
There are few countries in Europe with more diverse weather than Slovenia. A true four-season climate prevails here, and even regional variations can be significant.
For a country as small as Slovenia, the differences are surprising. Throw in the burja, a strong wind that rips through the country year-round, and it’s easy to see why choosing when to visit Slovenia isn’t always easy.
Three main zones determine the weather throughout Slovenia.
In the mountainous interior, an Alpine climate dominates. Harsh winters and unpredictable conditions characterize these areas throughout the year.
Along Slovenia’s coast, it’s far more pleasant. The sub-Mediterranean climate compares more favorably with the weather in Croatia, Slovenia’s southern neighbour, and with the coastal areas of Italy.
Elsewhere in Slovenia, particularly to the northeast, a continental climate brings conditions that resemble European destinations to the north like Germany and Czech Republic. Like in these countries, selecting the best time to visit Slovenia becomes ever more important.
Slovenia Weather By Season
Spring in Slovenia
- When is spring in Slovenia: From March until May.
- What to expect in spring in Slovenia: Even with the winter blues giving way to milder temperature, the weather is unpredictable throughout Slovenia in spring. Rainfall and cool days are still common. Late spring is drier and warmer and is a great time to start exploring Slovenia.
- What to wear in Slovenia in spring: With an always lingering chance of cool and rainy days, always be prepared with warmer waterproof clothing. A warm waterproof jacket would be a great addition to your travel backpack. Water resistant hiking shoes with a good grip are a must if you’re planning to delve into all the hiking opportunities Slovenia presents.
Summer in Slovenia
- When is summer in Slovenia: From June until August.
- What to expect in summer in Slovenia: With warm weather and sunny skies spreading throughout the country, summer is the definitive tourism high season in Slovenia. Popular destinations like Lake Bled, Ljubljana, Piran and Lake Bohinj get jam-packed with tourists. Although the crowds are thinner in spring and fall, the hot summer weather makes it a good time to hit the outdoors and enjoy Slovenia’s unbridled nature at its finest. While rain hits most of the country evenly throughout summer, it’s the driest season on the Mediterranean coast. (Just don’t forget it’s extremely busy!)
- What to wear in Slovenia in summer: The rising temperatures in Slovenia during summer mean that you’ll be able to get away with T-shirts and shorts throughout much of the season. For the always lingering possibility of rain, carrying a lightweight travel umbrella and a lightweight rain jacket in your travel daypack is never a bad idea.
Autumn in Slovenia
- When is autumn in Slovenia: From September to November.
- What to expect in autumn in Slovenia: Sitting outside of high season, visiting Slovenia in autumn is a good alternative to summer. Days are still pleasantly warm into September. Accommodation prices throughout the country are generally lower at this time of year. Cooler temperatures blow in during October and November with increased rainfall. Autumn is generally the wettest time of year in Slovenia.
- What to wear in Slovenia in autumn: With the quickly cooling temperatures, you’ll need to dress a little warmer as fall swings into full force. Early autumn still carries some of the characteristics of summer. On many days, you’ll be able to get away with lightweight clothing, perhaps even shorts and a T-shirt. As the wetter and cooler months roll in, you’ll need to pack some warmer clothing with waterproof outerwear. A pair of water-resistant hiking shoes is also recommended if you’re planning on hitting the trails into October and November.
Winter in Slovenia
- When is winter in Slovenia: From December to February.
- What to expect in winter in Slovenia: Winter is a magical time in Slovenia. From the Christmas markets of Ljubljana to the incredible skiing in the Alps, you might well fall in love with Slovenia at this time of year. The alpine areas are cold and windy during winter. Snow and rainfall are common. Much of the country experiences bitterly cold winters. Coastal areas are milder are more comfortable.
- What to wear in Slovenia in winter: With the cold temperatures blowing in, you’ll need to bundle up during winter in Slovenia. Warm outerwear will keep you toasty if planning any outdoor activities such as skiing. Always pack a toque and a pair of warm gloves.
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Slovenia Weather By Month
- Overview of weather in Slovenia in January: The average temperature in Slovenia dips to a cool -2°C (29°F). Average highs don’t often offer much relief at a still chilly 1°C (34°F). Expect average lows to drop to -5°C (23°F). January is, on average, the driest month in Slovenia.
- Where to go in Slovenia in January: If you’re planning outdoor winter activities in Slovenia, January’s a great month for it. By January, Slovenia’s ski season is in full swing. Head to Kranjska Gora for the country’s best skiing.
- Overview of weather in Slovenia in February: The last full month of winter in Slovenia slides in slightly warmer days than January. Average national temperatures rise only slightly to -1°C (31°F). Average highs and lows hit 3°C (38°F) and 2°C (35°F) respectively. Although snow is still quite common, February is a relatively dry month.
- Where to go in Slovenia in February: Skiers will hardly be disappointed in February as the ski season still rocks on in Slovenia. If you can handle the cold, visiting Lake Bled, Lake Bohinj or Soča Valley for winter sports like Nordic skiing will satisfy.
- Overview of weather in Slovenia in March: The winter temperatures start to shake loose as we head into March. Average temperatures get up to 3°C (38°F), edging slightly higher by the end of the month. Expect average highs of 8°C (46°F) and average lows of about 1°C (31°F). Inland areas begin to get a little wetter in March.
- Where to go in Slovenia in March: Much of the country is still in the throes of winter during March. The ski season is beginning to inch towards its end, but you should still be able to squeeze a few runs in. Spend a little time along the coast in Piran if you want to find some (slightly) warmer temperatures in March.
- Overview of weather in Slovenia in April: The first true month of spring pushes more comfortable temperatures your way. Average temperatures inch up to 7°C (45°F). The average highs creep ever so slightly into the double-digits at 12°C (53°C). At 3°C (37°F), the average lows in April can still get a little chilly. April is generally a wetter month than March throughout the country.
- Where to go in Slovenia in April: Although April is not an ideal month to travel to Slovenia, you should be able to experience much without a ton of inconveniences. Popular destinations like Ljubljana, Bled, Predjama Castle, Skocjan Caves are all accessible at this time of year. Keep in mind that April falls around Easter, a popular travel season in Slovenia. You’ll need to book your rooms well ahead of time to avoid disappointment.
- Overview of weather in Slovenia in May: With sunny days and temperatures preparing us for the hot summer ahead, May is an awesome time to visit Slovenia. Average temperatures reach up to 12°C (54°F) with average highs of 17°C (62°F) and average lows 7°C (45°F). Rainfall is only marginally higher compared to April. The warmer temperatures and relatively dry conditions make May one of the best times of year for hitting the hiking trails or getting your adventure on.
- Where to go in Slovenia in May: Most of the country is at your disposal with a visit in May. Don’t miss your chance to enjoy the beautiful weather in Ljubljana before the swarms descend upon it. Not only is May the perfect time to stay in the capital and dig into many of the best things to do in Ljubljana, many of the best day trips from Ljubljana are at your fingertips without the busyness that accompanies them pushing into June. Late May, after the spring meltdown has dried up, is a good time to take to the hiking trails around Bled, Lake Bohinj, and Bovec.
- Overview of weather in Slovenia in June: The first official month of summer brings sunshine, warmth, and joy throughout the country. Average temperatures hustle up to a comfy 16°C (60°F). Nice and warm 20°C (68°F) average highs sweep through Slovenia with averages lows of 11°C (51°F). Coastal areas get even warmer with average highs pushing into the mid-twenties. June is the wettest month in Ljubljana and the one of the driest along the Mediterranean.
- Where to go in Slovenia in June: With the beautiful weather sweeping in the tourists follow. Aside from the ever-increasing crowds, nearly everywhere in Slovenia is accessible in June. The first month of summer also brings festival season to Slovenia. Music festivals like the Ljubljana Jazz Festival and the Bled International Music Festival roll into tow in June.
- Overview of weather in Slovenia in July: The warmest month of the year couldn’t come soon enough! Average temperatures reach 17°C (63°F) with average highs pushing up to 23°C (73°F) and lows of 12°C (54°F). Both the coastal and the continental climate zones regularly see temperatures into the high-twenties and even into the thirties. Alpine areas are generally much cooler.
- Where to go in Slovenia in July: Although crowds are a problem in July, the excellent weather conditions keep people coming. As long as you don’t mind the hordes and book your accommodations in Slovenia well ahead of time, visiting anywhere in Slovenia during July is great. If you’re a fan of rock, don’t miss the Festival of Beer and Flowers in Laško, a huge music festival with Oktoberfest-like beer-swilling shenanigans.
- Overview of weather in Slovenia in August: Another warm month in Slovenia. Average temperatures are the same as July, peeking into the late-teens at 17°C (63°F). There’s little change in the average highs and lows, too. With average highs of 22°C (72°F) and average lows of 12°C (54°F), August is a comfortable month. Other than in the Alps, August is a slightly wetter month than July.
- Where to go in Slovenia in August: With the top destinations in Slovenia still teeming with tourists in August, try to get a little off-the-beaten-path. Along with September, August is the best time to climb Mount Triglav. The alpine regions are generally much cooler than the coast and inland areas. Escape the heat with some incredible walks and hiking around Triglav National Park, Kranjska Gora, Bled or Bovec.
- Overview of weather in Slovenia in September: The ever-so-short summer wanes as we succumb to the first signs of fall. September is still a comfortable month with average temperatures of 14°C (57°F). Average highs and lows begin to dip, sitting at about 19°C (66°F) and 9°C (48°F) for the month. On average, September is the wettest month in the Alps. The coastal areas witness a sharp increase in precipitation moving into the wet autumn season.
- Where to go in Slovenia in September: With accommodation prices sliding downwards after the peaks of high season, September is a fantastic time to travel around Slovenia. All the best places to visit in Slovenia are all ripe for exploration. If you’re looking for something a little off-beat to occupy your time, it’s unlikely you will find anything quite like the Cow Ball in Lake Bohinj.
- Overview of weather in Slovenia in October: Any signs of summer are long gone by October, the first full month of autumn. Average temperatures drop down to last month’s lows at 9°C (48°F). The average highs loses their edge at a much cooler 13°C (56°F). Cool average lows begin to chill the bones at 5°C (41°F). October is on average one of the the wettest months in Slovenia, especially along the coast.
- Where to go in Slovenia in October: With autumn colours are in full swing, October is one of the prettiest times to seek refuge in the outdoors. Popular destinations like Lake Bled, Vintgar Gorge, and Lake Bohinj have seen the high season come and go. Spotting the fall colours in any of these would makes for a memorable Slovenia trip. If you love wine, don’t miss out on the Old Vine Festival, a culinary and cultural event held annually in Maribor.
- Overview of weather in Slovenia in November: A far less tolerable month than October, November is generally not one of the best times to visit Slovenia. Expect foggy and damp weather with cooler temperatures blowing in. Average temperatures slip down to 3°C (38°F) with average highs of just 6°C (43°F) and average lows of 1°C (33°F). November is the wettest month in Ljubljana.
- Where to go in Slovenia in November: While most would-be travellers avoid November, wine lovers should it a second look. The official wine season in Slovenia kicks off after St. Martin’s Day (Nov 11), sparking a slew of wine festivals throughout the country. Some of the biggest festivities take place in Maribor, Ljubljana, and Kranj.
- Overview of weather in Slovenia in December: With the misery of a dreary November behind us, the coming of December isn’t necessarily a bad thing. Although the average temperatures dip to 0°C (32°F), the holiday season in Slovenia returns joy throughout the country. Don’t let the average highs of 2°C (36°F) and average lows of -3°C (27°F) keep you from getting outside. December is generally much drier than November. The magic of the first snowfall and the Christmas season give December an edge on the other winter months.
- Where to go in Slovenia in December: Every year, Central Europe comes alive with the spirit of Christmas. Slovenia’s no different. Spread the cheer in Ljubljana, taking in the city’s famous Christmas Market. For the entire month of December (and a few days in January), Bled surges with joy during Festive Winter Village promenade.
The Verdict: When is the Best Time to Visit Slovenia?
The best month to visit Slovenia is May or September.
Why Visit Slovenia in May?
May is a wonderful time to visit Slovenia. Sitting in the shoulder season, May sees much lower tourism numbers than the summer high season of June to August. The Mediterranean coast isn’t full of Italians looking to stretch their Euro farther. The streets of Ljubljana aren’t overloaded with tourists yet. And outdoor hotspots like Lake Bled and Lake Bohinj? Well, you might just have a little more space there, too.
The rising temperatures, especially in late May, combined with lower precipitation, make spending time outdoors in Slovenia in May pleasant. Accommodations prices are also generally lower. You’ll probably see your Euros dwindle a little slower in choosing May over June, July or August.
Why Visit Slovenia in September?
Like May, Slovenia is close to its peak in September. Although the temperatures aren’t as warm as in summer, September is still comfortable enough to enjoy the outdoors to its fullest. With the tourist high season in the rearview mirror, Slovenia quiets down significantly in September. Finding great deals on accommodation in Slovenia is always easier than in the height of tourist season.