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Slovenia Seasons & Climate

There are four seasons in Slovenia, similar to much of North America. You can expect a fairly warm spring running from late March through May, a hot and dry summer from June until early September, a mild fall from September to November, and an often bitterly-cold winter, which lasts from December until mid-March.

Lying at the heart of Europe, between the Alps, the Adriatic Sea and the Pannonian Plain, Slovenia’s varied geography creates three very distinct climates that interact with each other. The country is marked by a typical European continental climate in the northeast, which features the greatest temperature difference between summer and winter; a harsh Alpine climate in the high mountain regions; and a pleasant sub-Mediterranean climate in the coastal areas and the lowlands of the south, where winters also tend to be milder. During the sunny summers, the daytime temperatures are generally around 68 – 77°F but sometimes a fair bit higher reaching 86°F or more. July is Slovenia’s hottest month.

Precipitation is abundant in the western part of the country, where it varies between 40 and 60 inches per year on the plains and the hills, reaching up to 120 inches on the most exposed slopes of the mountains. January is Slovenia’s coldest month with daytime temperatures usually at around freezing in the north, but often dropping a lot lower, accompanied by cloudy skies and plenty of rain or snow. In the mountains, snow may stay as late in the year as June.  

The western plains are exposed to a furious, cold and gusty, north-easterly wind, called the Burja (Bora), which whips down through the Karst Plateau on its way to the Bay of Trieste. Another wind, known as the Jugo, blows from the southwest to the southeast before the cold front of a passing Mediterranean cyclone.

Most travelers consider summer to be the best time to visit Slovenia, when the weather is at its most dependable, all of the tourist sights are open, and the country’s numerous festivals are in full swing. However, many of Slovenia’s attractions are just as enjoyable outside the peak season, and in particular during the springtime and the fall, when nature’s colors are at their most resplendent, and the crowds a little thinner.