Greece is bracing for significant weather changes starting Monday, with heavy rainfall forecasted in various regions, particularly in the Ionian Islands, including Zakynthos and Cephalonia. The western and central parts of Greece, as well as the Peloponnese, Epirus, and Thessaly, are expected to experience notable rainfall and thunderstorms. Temperatures will range from 12 to 20 degrees Celsius across the country. Athens and Thessaloniki will see partly cloudy skies with moderate winds, maintaining a temperature range of 8 to 18 degrees Celsius and 8 to 14 degrees Celsius, respectively.