What should I wear when traveling to Vancouver, Canada in September?

The average temperature in Vancouver in September is 10℃~19℃. The average daytime temperature is 19°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 10°C. It is recommended to wear warm clothes such as suits, jackets, windbreakers, casual clothes, jackets, suits, and thin sweaters. The cities with the highest average daily temperatures in September in Vancouver are Edmonton (17℃), Banff (16℃), Whitehorse (12℃), and Grande Prairie (16℃). The cities with the lowest average daily temperatures in September in Vancouver are Edmonton (3℃), Banff (3℃), Whitehorse (2℃), and Grande Prairie (4℃).