What should I wear for a trip to Boston, USA in May?

The average temperature in Boston in May is 1℃~19℃. The average daytime temperature is 19℃. 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 average temperature at night is 1℃. It is recommended to wear warm clothes such as suits, jackets, jackets, jackets and thin sweaters. The cities with the highest average daily temperature in Boston in May are Abilene (29℃), Akron (21℃), Albany (21℃) and Albuquerque (26℃). The cities with the lowest average daily temperature in Boston in May are Abilene (16℃), Akron (9℃), Albany (7℃) and Albuquerque (9℃).