What to wear when traveling to Greece in April?

The average temperature in April in Greece is 9℃~20℃. The average daytime temperature is 20°C. It is recommended to wear comfortable clothes such as short suits, T-shirts, thin jeans, casual clothes, and professional suits made of single-layer cotton and linen fabrics. The average temperature at night is 9℃. It is recommended to wear warm clothes such as suits, jackets, windbreakers, casual clothes, jackets, suits, and thin sweaters. The cities in Greece with the highest average daily temperatures in April are Thessaloniki (19℃) and Athens (20℃). The cities in Greece with the lowest average daily temperatures in April are Thessaloniki (8℃) and Athens (10℃).