What September feels like in Barcelona
September is early autumn in Barcelona. Warm daytime weather invites long lunches outside and evening strolls. The gap between afternoon and night is small, so nights stay mild and the temperature hardly changes after dark. Thick, humid air means clothes cling and the heat feels stronger than the number.
Rain in Barcelona in September
It is a changeable month: rain comes about one day in 3, with dry spells in between. Each rainy day adds about 8.6 mm (0.3 in), a proper wetting rather than a sprinkle. Across the year Barcelona averages about 7.3 mm per rainy day, so September is typical. It is among the three wettest months of the year.
Daylight and sunshine in September
On 15 September the sun rises at about 7:30 am and sets around 8:03 pm local time, giving 12 h 33 min of daylight. Compared with mid-August, the day has lost 1 h 21 min. The sun is out for roughly 82% of those daylight hours, so skies are mostly clear.
How September compares to the rest of the year
In Barcelona's temperature order, September sits as the 4th warmest month. Compared with August, afternoons are 3.2°C (5.8°F) cooler, with 41 mm more rain. October is cooler again. By October, typical highs are 21.5°C (70.7°F).
Who September suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: a good fit — pleasant for gardens, parks and riversides.
- Beach: less ideal — too many rainy days.
Tips for visiting Barcelona in September
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Barcelona in September?
It feels warm: typical highs are 24.8°C (76.6°F), with lows near 18.3°C (64.9°F).
Does it rain a lot in Barcelona in September?
It does: about 10 rainy days bring roughly 86 mm, so plan some indoor options.
What should I wear in Barcelona in September?
Based on the averages: rain protection and sunglasses. There is little need to change for the evening.
Is September or October better for visiting Barcelona?
On our 12-month climate ranking, October comes out ahead (#6 of 12 vs #7). October is cooler and has fewer rainy days.