Due to Slovenia’s geography, the weather varies greatly between the mountains and the coast. There are roughly three areas, the coast, the center, and the Alps. The shoreline has a Mediterranean climate which is characterized by hot summers, averaging 73°F, and mild winters, with temperatures of 37°F. Colder weather, heavy winds, and rain make the coast a less attractive option between December and March.
Central Slovenia has a continental climate, with summer temperatures averaging 60°F and about 120 rainy days per year. Winters can be very cold, with temperatures falling to 32°F. The mountainous northwest has an Alpine climate, with changeable summer weather and temperatures regularly between 53-73°F. Winters are very cold at freezing point and below, and regular snow keeps the skiing good.
Best Time to Visit Slovenia
Slovenia has two peak seasons. The first is the summer months of June, July, and August, when warm weather lures travelers to the main attractions and the great outdoors. The second peak occurs around December when snows attract Christmas visitors, skiers and snowboarders from around the globe.
Summer is ideal for visiting the nation’s caves, lakes, historic towns and cities. Summer is also the most expensive time to visit Slovenia, so visitors choosing the shoulder months in spring or fall can enjoy smaller crowds and cheaper rates. Some attractions and transportation options do close for the season, so it’s best to check online beforehand to avoid disappointment.
April (late spring) or October (early fall) are the best months for hikers and climbers as the weather is mild with fewer temperature extremes. The capital of Ljubljana is popular in summer when the weather is warm and breezy and, although festive activities can make the city exciting in December, heavy fogs can also make it very cold, so it is advisable to bring warm clothing.