Climatological data for Barcelona during September typically reveals a transition period from summer’s heat to the milder temperatures of autumn. Average daily highs often reside in the mid-70s Fahrenheit (low 20s Celsius), while overnight lows can dip to the low 60s Fahrenheit (high teens Celsius). Sea temperatures remain relatively warm, generally comfortable for swimming. Rainfall is possible, although September is not typically one of the wettest months in the city.
Understanding the typical weather conditions for this time of year is valuable for travelers planning a visit. Packing appropriate clothing layers for fluctuating temperatures and checking forecasts closer to the travel dates can enhance comfort and enjoyment. Historically, September offers a pleasant balance between warm weather and fewer crowds compared to the peak summer months, making it an attractive time to explore the city’s cultural attractions and enjoy outdoor activities.