Meteorologist Panagiotis Giannopoulos forecasts that today will be the coldest day of the week in Greece, with morning temperatures ranging from -4°C in Nevrokopi to 2°C in coastal Thrace. Rain is expected in the South Aegean, while sporadic thunderstorms may occur near Kastelorizo. From Tuesday to Thursday, warmer weather is anticipated, with daytime highs reaching 16-18°C. A new weather system bringing rain is predicted for Friday, spreading across the country. Overall, a gradual improvement in weather with more sunshine is expected over the weekend.