Barcelona weather in September
September in Barcelona: warm, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Barcelona · #213 of 604 destinations to visit in September · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Barcelona climate normals — September
| Daytime high | 25°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 72 mm / 2.8 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 12.5 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Barcelona?
Loading map…
Barcelona in September — FAQ
- Is September a good time to visit Barcelona?
- September in Barcelona: warm, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Barcelona on SeasonMap's comfort score (84/100).
- What is the weather like in Barcelona in September?
- In September, Barcelona averages a daily high of 25.3°C and a low of 19.2°C, with about 71.7 mm of rain over roughly 9.6 rainy days.
- What is the air quality in Barcelona in September?
- Barcelona has a mean US Air Quality Index of about 48 in September.