The climate of Greece is primarily Mediterranean, featuring mild, wet winters and hot, dry summers. This climate occurs at all coastal locations, including Athens, the Cyclades, the Dodecanese, Crete, the Peloponnese and parts of the Sterea Ellada (Central Continental Grece) region. The Pindus mountain range strongly affects the climate of the country, as areas to the west of the range are considerably wetter on average (due to greater exposure to south-westerly systems bringing in moisture) than the areas lying to the east of the range (due to a rain shadow effect).
The mountainous areas of Northwestern Greece (parts of Epirus, Central Greece, Thessaly, Western Macedonia) as well as in the mountainous central parts of Peloponnese – including parts of the regional units of Achaea, Arcadia and Laconia – feature an Alpine climate with heavy snowfalls. The inland parts of northern Greece, in Central Macedonia and East Macedonia and Thrace feature a temperate climate with cold, damp winters and hot, dry summers with frequent thunderstorms. Snowfalls occur every year in the mountains and northern areas, and brief snowfalls are not unknown even in low-lying southern areas, such as Athens.
Phytogeographically, Greece belongs to the Boreal Kingdom and is shared between the East Mediterranean province of the Mediterranean Region and the Illyrian province of the Circumboreal Region. According to the World Wide Fund for Nature and the European Environment Agency, the territory of Greece can be subdivided into six ecoregions: the Illyrian deciduous forests, Pindus Mountains mixed forests, Balkan mixed forests, Rhodope montane mixed forests, Aegean and Western Turkey sclerophyllous and mixed forests and Crete Mediterranean forests.