Easter Island is characterised by a subtropical climate. Summers are hot and humid while winters are relatively mild with heavy rainfall. July and August are the coldest months, April is the wettest and February is the hottest on average. In February, average temperatures range between 68°F (20°C) and 81°F (27°C). Heavy rainfall and thunderstorms frequently occur during the winter months of June to August, but rain is plentiful year-round. Easter Island's temperature is moderated by the almost constant sea winds which keep the weather cool and mild throughout the year.