The weather in Greece is expected to be predominantly sunny on Sunday, with a transition to rainy conditions on Monday and Tuesday, accompanied by strong southwesterly winds. Christmas Day and Thursday will see a drop in temperatures, reaching lower than normal levels. While northern areas can expect temperatures between 8 to 11 degrees Celsius, regions like the South Aegean may rise to 18 degrees Celsius. Localized rains and potential snowfall in mountainous areas will also occur. The forecast is provided by meteorologist Panagiotis Giannopoulos.