Greece will experience a series of low-pressure systems in the coming days, starting with rain from Italy on Friday afternoon. This will be followed by further rain and possible thunderstorms over the weekend, particularly in the western regions and Cyclades. Temperatures will drop slightly, with snow expected in the northwestern mountains. Improved weather is forecast for Sunday, but more rain and cold temperatures are predicted for next week. In major cities like Athens and Thessaloniki, some rain is also expected, with temperatures around 14-17 degrees Celsius.