The climate in Barcelona during September can be summarized as warm, humid and reasonably dry.
September is in the fall / autumn in Barcelona and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 17°C (62°F) is normal.
|Daytime temperature||24.8°C 76.6°F|
|Nightly temperature||16.9°C 62.3°F|
|Average temperature||20.8°C 69.4°F|
|Daily sunshine||7.3 hrs|
|Avg rainfall||75 mm 3 ins|
|Rainy days||9 days|
|Sea temperature||23.6°C 74.5°F|
|Windspeed||10.8kph 7 mph|
On average September is the 2nd wettest month of the year in Barcelona with around 75mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.3 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Barcelona in September 2023.
|Hottest month:||August||26.8°C 80.2°F|
|Driest month:||July||25mm 1ins|
|Coldest month:||January||12.8°C 55°F|
|Wettest month:||October||84mm 3.3ins|