Athens, Greece has a Mediterranean climate, which means it has mild winters and hot summers. The city is known for its sunny weather and relatively low rainfall, making it a popular tourist destination year-round.
In the winter months (December-February), the weather in Athens is mild, with average temperatures ranging from 10-15C (50-59F) during the day and 5-10C (41-50F) at night. There can be occasional rain and occasional cold winds (Etesian winds) from the north.
In the spring months (March-May), the weather in Athens starts to warm up, with average temperatures ranging from 15-20C (59-68F) during the day and 10-15C (50-59F) at night. During this season, you can also expect some occasional rain.
In the summer months (June-August), the weather in Athens can be quite hot, with average temperatures ranging from 25-35C (77-95F) during the day and 20-25C (68-77F) at night. This is the peak tourist season, and the city can be quite crowded.
In the fall months (September-November), the weather in Athens starts to cool down again, with average temperatures ranging from 20-25C (68-77F) during the day and 15-20C (59-68F) at night. During this season, you can also expect some occasional rain.
It’s important to keep in mind that Athens can be very hot in the summer, so it’s recommended to wear light and comfortable clothes and to drink plenty of water. Also, remember that many ancient sites like the Acropolis have limited shade, so a hat and sunscreen are recommended.