Slovenia has a Mediterranean climate on the coast, and a continental climate with mild to hot summers and cold winters in the plateaus and valleys to the east. Most of Slovenia's annual rainfall occurs during spring in the interior regions away from the coast. Winters are cold, particularly along the eastern part of the country and in the Slovenian Alps, which are often covered in snow during the winter period. The Slovenian coastline has a sub-Mediterranean climate while the interior regions have a continental climate with chilly winters and hot summers.