The weather in Slovenia is marked by a moderate climate and four fairly distinct seasons: spring, summer, fall, and winter. Spring lasts from late March to May and is fairly warm. Summer lasts from June to early September. It is a hot and sunny time of the year with daytime temperatures around 20-25°C, but sometimes quite higher, 30°C or more. July is Slovenia’s hottest month. Autumn lasts from September to November, and produces mild weather. Winter lasts from December to mid-March. It can be bitterly cold during this time with daytime temperatures usually around 0-5°C. January is Slovenia’s coldest month.
The coastal areas of Slovenia have a sub-Mediterranean climate. Image by Ric18Ek / CC BY-SA 3.0
However, Slovenia is nestled between the Alps, the Adriatic Sea and the Pannonian Plain and its varied geography creates three distinct Slovenian climates that interact with one another: a sub-Mediterranean climate in the coastal region (the weather near the coast is typically warm and sunny; winters tend to be milder than elsewhere in Slovenia), a severe Alpine climate in the high mountain regions (the Alpine winters are colder than elsewhere in Slovenia, and summer temperatures are moderate; in the mountains, snow may stay as late in the year as June), and a Continental climate in the northeast (the seasons are clearly differentiated, this climate features the greatest temperature difference between summer and winter).
Lake Bled has the longest swimming season of any alpine lake in Europe (from June to late September). Image by Derbeth / CC BY 2.0
The number of hours of annual sunshine are highest in the coastal towns of Piran, Portoroz, Izola and Koper, and lowest in the Slovenian capital Ljubljana. Summer is Slovenia’s high tourist season, lasting from June to September. During the summer, Ljubljana, Bled and the Slovenian coast become pretty crowded. Swimming season lasts from mid-May to October. Ski season runs from December to March or even April. Sunny and dry September is a great time for climbing in Slovenian Alps.
In the Slovenian mountains, the climate is Alpine and relatively harsh. Image by Dino Kužnik / CC BY 2.0
| Weather and climate information for top 30 tourist destinations in Slovenia |
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| - Ljubljana Weather and Climate A good time to visit Ljubljana is anytime, although most favour the spring, summer and autumn climate. However, don't overlook the Christmas and New Year's celebrations, which brighten up even the harshest of winter weather in Ljubljana. |
| - Maribor Weather and Climate The Maribor climate is strongly influenced by the city’s location. Standing on the south-eastern side of the Alps and experiencing warm weather the year round, visitors to Maribor can expect warm summers that are not overly hot. This season is soon followed by cooler autumn and winter weather, which is rarely harsh to extremes. |
| - Bled Weather and Climate Lake Bled enjoys pleasant, sunny summers when days are long and temperatures can often exceed 25°C, particularly in July and August. Lake Bled has the longest swimming season of any alpine lake in Europe (from June to late September). Winter weather in Bled, by contrast, is bitterly cold, with snow and frosty days when temperatures hover at or just below freezing. |
| - Piran Weather and Climate Resting on the Adriatic Sea, Piran comes with a typically-pleasant Mediterranean climate, which means hot, dry summers and mild winters. Daytime summer temperatures hover around the upper 20s (°C), while winters rarely see dips below 0°C during the day. |
| - Portoroz Weather and Climate Portoroz lies on the Slovenian Coast and enjoys a climate that is quite different from other parts of Slovenia. Visitors can expect Mediterranean-style weather in the summer, with plenty of sunshine and high temperatures, as well as mild winters. |
| - Kranjska Gora Weather and Climate The ski resort of Kranjska Gora experiences some very distinctive weather, with seasonal climate changes being strongly influenced by it situation within the Gorenjska region and the Slovenian Alps. Kranjska Gora has grown to become one of Slovenia’s leading winter resorts, and so during the winter months, you can expect plenty of snow and a rather chilly climate. However, the summer climate is quite different and whilst it could never really be described as hot, it is certainly warm and very pleasant. |
| - Izola Weather and Climate Izola is an old fishing town located on the Slovenian Adriatic coast. For many, the spring and autumn climate offers the best time of the year to visit Izola, since the height of the summer weather can be a little too hot for some. July and August always tend to be the hottest months in Izola, when temperatures have been known to soar up to 30°C and more. |
| - Koper Weather and Climate Koper is the biggest town on the Slovenian coast and the climate here is more Mediterranean from other parts of Slovenia. Summer temperatures rarely exceed 30°C and winter temperatures seldom drop below freezing. The cold Bora winds blow during the winter months and the south wind called Jugo brings clouds and rain, but there is plenty of sunshine at this time. |
| - Novo Mesto Weather and Climate With a typically Slovenian climate, temperatures in Novo Mesto are usually fairly pleasant, regardless of the time of year. However, the summer weather in Novo Mesto is the most appealing and inviting, and sees a noticeable climb in visitor numbers. You can expect to experience some rainy weather at times, although this is usually light and quite intermittent. Winter is the driest time, with only a few days of snow or rain expected between December and March. |
| - Lipica Weather and Climate Located in southwest Slovenia, Lipica is famous for its stud farm breeding white Lipizzaner horses. Visitors to Lipica can expect Mediterranean-style weather in the summer, with plenty of sunshine and temperatures that rarely feel uncomfortably hot, as well as mild winters. In the late spring and early autumn, temperatures in Lipica are at their most pleasant. |
| - Podcetrtek Weather and Climate Podcetrtek’s weather is typically Slovenian, with a temperate climate. The winters in Podcetrtek are cold and damp at times, while the summers are warm to hot, with extremely balmy evenings. |
| - Lake Bohinj Weather and Climate With reasonably warm summer weather and pretty chilly winters, Bohinj is at its most appealing between the months of May and September, when high temperatures are most likely. |
| - Celje Weather and Climate The climate in Celje features distinct seasons, namely winter and summer. Spring and autumn are still apparent, but the weather at these times of the year merges between Celje’s more obvious seasons, remaining much more short-lived. |
| - Moravske Toplice Weather and Climate Moravske Toplice is a part of northeastern Slovenia and experiences a temperate, continental climate with warm, fairly moist summers and cold, often snowy, winters. The best time to travel here, as with anywhere in Central Europe, is between May and September, when it is warmest. |
| - Postojna Weather and Climate Located in southwest Slovenia, the city of Postojna enjoys a moderate climate with warm weather in the summer months and cool winters. In summer, visitors to Postojna experience a pleasant climate and warm temperatures, and the hottest months of the year are July and August, when maximum daytime temperatures can reach around 25°C. Winter in Postojna runs from December through to March and the coldest weather occurs in January, when daytime temperatures drop below 0°C. The cold Bora winds blow during the winter months and snowfalls will occur through these months. |
| - Strunjan Weather and Climate For the sun, you can visit anytime between May and September to experience nice weather. Strunjan enjoys one of the sunniest climes on the Adriatic with more than 2300 hours of sun a year, although has its fair share of rainfall, too – mainly in autumn. The winter weather and climate in Strunjan is quite mild compared to other parts of Slovenia. As a result, frost and snow are experienced only infrequently. |
| - Nova Gorica Weather and Climate Whilst temperatures may vary from year to year, Nova Gorica tends to enjoy a pleasant climate all year round. The spring and autumn are generally the best seasons to visit Nova Gorica. During the summer climate, Nova Gorica basks in fairly high temperatures, although the hot, sunny weather can be often punctuated by the thunderstorm. |
| - Bovec Weather and Climate Located in the north-west of Slovenia, the climate in Bovec is definitely more continental than Mediterranean in nature. The winter months bring cold, although not harsh, weather to Bovec and summer visitors can look forward to fairly high, warm temperatures. Whatever the time of year, though, visitors to Bovec should come prepared for showers. This is particularly the case in the autumn, when the climate can be particularly changeable. |
| - Kobarid Weather and Climate Located in the north-west of Slovenia, the climate the climate of Kobarid is described as temperate, with each season being quite individual and easy to recognise. The winter months bring cold, although not really harsh, weather to Kobarid and summer travelers can look forward to fairly high, warm temperatures. |
| - Kranj Weather and Climate With a temperate climate where each month merges into the next, Kranj is a pleasant city to visit, regardless of the time of year. However, typically Slovenian in character, the weather in Kranj can be rather changeable at times, when any day can be rainy or sunny, warm or cold, gusty or calm – or any combination of all of these conditions. |
| - Radovljica Weather and Climate The summer climate is always the most popular time to visit Radovljica, and even the evening temperatures are favourable, enticing people to sit on the terraces, outside of central bars and restaurants. Autumns in Radovljica are fairly long, since the summers can be short. When the winter climate arrives, heavy overnight frosts add a noticeable crispness to the air, followed soon by spells of snowy weather. Spring is usually quite early and by the end of April, flowers are blooming and the trees quickly burst back into life, with daytime temperatures staying above 10°C. |
| - Lasko Weather and Climate Offering a moderate climate with no real temperature extremes, the weather in Lasko combines elements from both eastern and western Europe. The summer climate in Lasko is warm, agreeable and at times even a little hot, while the winter weather gradually arrives at the end of November and by January and February, the temperatures are feeling a touch crisp, both by day and night. |
| - Moravske Toplice Weather and Climate Moravske Toplice is a part of northeastern Slovenia and experiences a temperate, continental climate with warm, fairly moist summers and cold, often snowy, winters. The best time to travel here, as with anywhere in Central Europe, is between May and September, when it is warmest. |
| - Ankaran Weather and Climate Located on the Adriatic Coast of Slovenia, Ankaran enjoys Mediterranean-style weather in the summer, with plenty of sunshine and high temperatures, as well as mild winters. |
| - Sezana Weather and Climate Sezana has the typical spring, summer, autumn, and winter climate variations. It’s pretty hot in the summer, near freezing in the winter and pleasant in late spring and early autumn. |
| - Lesce Weather and Climate Lesce enjoys nice, sunny summers when days are long and temperatures can often exceed 25°C, particularly in July and August. However the summer months are also unpredictable, and odd days can rapidly change from sunshine to rain. The winter months in Lesce, by contrast, are bitterly cold, with snow and frosty days when temperatures hover at or just below freezing. |
| - Upper Carniola Weather and Climate The tourist levels in the Upper Carniola region of Slovenia are at their highest in the summer months, especially between June and August, when the weather is at its best, although summer days are known to be somewhat changeable and rather unpredictable. Other great months to visit Upper Carniola are May, June, September and October when the average temperatures are a little cooler but still between a pleasant 15°C and 20°C. Autumns in Upper Carniola are fairly long, since the summers can be short. By December, the winter climate has definitely arrived and the season for winter sports begins, with soft, powdery snow and a surprising amount of sunshine across the Alpine skiing resorts. |
| - Slovenian Alps Weather and Climate Gorenjska, or the Slovenian Alps as it is most commonly called in English, has the moderate Alpine climate with very distinctive seasons, which change quickly and noticeably. Although the climate in the Slovenian Alps can be a little chilly at times, the summer months are quite warm. From mid-June to August, the fine summer weather in Slovenian Alps results in daytime averages of between 20°C and 25°C, although with a little strong sunshine, temperatures can often rise higher. |
| - Gorenjska Weather and Climate Gorenjska is determined by the Alpine climate. It enjoys pleasant, sunny summers when days are long and temperatures can often exceed 25°C, particularly in July and August. However the summer months are also unpredictable, and the weather can change from sunshine to cloud and rain in a matter of minutes. Winter weather in Gorenjska, by contrast, is bitterly cold, with snow and frosty days when temperatures hover at or just below freezing. |
| - Slovenian Istria Weather and Climate Slovenian Istria enjoys a climate that is quite different from other parts of Slovenia. Here, visitors can expect Mediterranean-style weather in the summer, with plenty of sunshine and high temperatures, as well as mild winters. Slovenian Istria does experience a fair amount of rainfall throughout the year, so both summer and winter visitors should come prepared with appropriate wet weather gear. |
The weather in Slovenia is marked by a moderate climate and four fairly distinct seasons: spring, summer, fall, and winter. Spring lasts from late March to May and is fairly warm. Summer lasts from June to early September.