Barcelona in September
In September, Barcelona averages 26°C (79°F) during the day and 18°C (64°F) at night, with around 6 days of rain (75 mm total).
High seasonConditions are warm and beach-friendly. Occasional showers are likely but won't dominate.
September is a great month to visit Barcelona: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in Barcelona
September is in the middle of the year for warmth in Barcelona (4th of 12) and one of the wettest months (2nd of 12). Daytime temperature runs 5°C above the annual average (21°C). September runs 3°C cooler than August (29°C) and cools 4°C in October (22°C).
September sunrise & sunset in Barcelona
Times shown for Barcelona local time (Europe/Madrid), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Barcelona — September
Golden-hour and blue-hour windows for the 15th of September, in Barcelona's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Barcelona in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Barcelona's popularity.
Crowds & pricing — September in Barcelona
This is a busy month in Barcelona — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Barcelona
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Barcelona — September
Across the year Barcelona's sea swings from 13.5°C (February) to 27.4°C (August) — September sits at 25.2°C.
Barcelona in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 5°C / 41°F | 41 mm | 5 | — |
| February | 15°C / 59°F | 6°C / 43°F | 36 mm | 4 | — |
| March | 17°C / 63°F | 8°C / 46°F | 47 mm | 5 | — |
| April | 19°C / 66°F | 10°C / 50°F | 49 mm | 6 | — |
| May | 22°C / 72°F | 14°C / 57°F | 53 mm | 5 | — |
| June | 26°C / 79°F | 17°C / 63°F | 35 mm | 4 | — |
| July | 29°C / 84°F | 20°C / 68°F | 26 mm | 3 | — |
| August | 29°C / 84°F | 21°C / 70°F | 49 mm | 4 | — |
| September | 26°C / 79°F | 18°C / 64°F | 75 mm | 6 | — |
| October | 22°C / 72°F | 14°C / 57°F | 87 mm | 6 | — |
| November | 17°C / 63°F | 9°C / 48°F | 60 mm | 6 | — |
| December | 14°C / 57°F | 6°C / 43°F | 51 mm | 5 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Barcelona in September →
Frequently asked questions
How hot is Barcelona in September?
In September, Barcelona averages a high of 26°C (79°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Barcelona in September?
September sees occasional rain in Barcelona, with about 6 rainy days on average.
Is September a good time to visit Barcelona?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Barcelona in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for Barcelona for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.