What to expect in Barcelona in September
September is one of the best times to visit Barcelona. Expect 25° / 18°, the biggest crowds of the year and prices close to the yearly average.
Barcelona weather in September
Typical conditions in Barcelona during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 25°C 77°F |
|---|---|
| Average low | 18°C 64°F |
| Rainfall | Moderate 40/100 |
| Total rainfall | 81 mm3.2 in |
| Rainy days | 7 |
| Sea temperature | 24°C 75°F |
| Daylight | 12 h 30 min |
| How it feels | Warm and comfortable |
Average highs sit around 25°C with lows near 18°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are High for Barcelona — the biggest crowds of the year.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Light layers for 25°C days and something with sleeves for evenings, which cool to around 18°C.
What it costs
Costs in September sit around the yearly average for Barcelona — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 25% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- Visitors who want to catch a festival
Events & what’s on
Look out for La Mercè Festival while you’re there.
- La Mercè Festival — Human towers and fire runs headline the city’s biggest party.
Barcelona in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 28° / 20° | High | $$$ | 44 |
| August | 28° / 21° | High | $$$ | 44 |
| September · This month | 25° / 18° | High | $$ | 57 |
| October | 21° / 14° | Moderate | $$ | 60 |
| November | 17° / 10° | Low | $ | 66 |
These months score higher for Barcelona on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
