Barcelona weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – August
What is the weather like in Barcelona in September?
In September, Barcelona is warm: daytime highs average 24 °C, and nights cool down to about 19 °C. The sea averages 24.1 °C – pleasant for swimming. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 72 mm in total. All in all, September is a good month for a holiday in Barcelona.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 94 | 79 | 79 |
| Day | 27° | 24° | 21° |
| Night | 21° | 19° | 16° |
| Sea | 26° | 24° | 21° |
| Sun | 9 h | 7 h | 6 h |
| Rain days | 7 | 11 | 10 |
More details for September
- Daylight
- 12 h 33 min07:30 – 20:03
- UV index
- 6 · highclear sky, noon (estimate)
- Muggy days
- 11 daysdew point 18 °C or more
- Wind
- 15 km/haverage daily peak
- Cloud cover
- 52 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+2Europe/Madrid
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %70 %
- Few rainy daysweight 30 %51 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Rain jacket or umbrella
Barcelona in September: quick answers
Is Barcelona hot in September?
Warm rather than hot: in September, daytime highs in Barcelona average 24 °C and nights cool to about 19 °C.
Can you swim in Barcelona in September?
Yes. In September the sea averages 24.1 °C – pleasant for swimming.
Does it rain much in Barcelona in September?
Rain is frequent, with about 11 rainy days and 72 mm in total.
Barcelona month by month
The whole year in BarcelonaAll destinations: Spain
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)