Weather In Barcelona Spain In September 2024. Weather in barcelona in september: A belter of a month the weather in barcelona in september gets off to a hot start and gradually cools to warm and fresh.

Find out the average temperature, rainfall, and wind speed for barcelona in september 2024 based on historical data. The average temperature is around 69.6°f (20.9°c), making it a great time to visit if you prefer milder weather.