What should I wear to travel to Japan in September?

The average temperature in Japan in September is 20℃~27℃. The average temperature during the day is 27 degrees Celsius. It is recommended to wear cool and breathable clothes, such as shirts, thin long skirts and thin T-shirts made of cotton and linen. The average temperature at night is 20 degrees Celsius. It is recommended to wear short suits, T-shirts, thin jeans, casual clothes, professional suits and other comfortable clothes made of single-layer cotton and linen fabrics. The cities with the highest daily average temperature in Japan in September are Osaka (29℃), Fukuoka (28℃), Nagoya (Aichi) (29℃) and Naha (Okinawa) (30℃). The cities with the lowest daily average temperature in September in Japan are Osaka (22℃), Fukuoka (2 1℃), Nagoya (Aichi Prefecture) (2 1℃) and Naha (Okinawa) (26℃).