What should I wear to travel to Seattle in September?

Average temperature in Seattle in September 1 1℃~2 1℃. The average daytime temperature is 265,438 0℃. It is recommended to wear short suits, T-shirts, thin jeans, casual clothes, professional suits and other comfortable clothes made of single cotton and linen fabrics. The average temperature at night is 1 1℃. It is recommended to wear warm clothes such as suits, jackets, windbreakers, casual clothes, jackets, suits and thin sweaters. The cities with the highest daily average temperature in Seattle in September are Abilene (30℃), Akron (23℃), Albany (23℃) and Albuquerque (28℃). The cities with the lowest daily average temperature in Seattle in September are Abilene (18℃), Akron (12℃), Albany (10℃) and Albuquerque (13℃).