Barcelona Weather in September
In September, Barcelona averages a high of 26°C (79°F) and a low of 18°C (65°F), from 55 years of daily records (1971–2026).
26°C
Average high
79°F
18°C
Average low
65°F
33°C
Record high
92°F · September 8, 1994
8°C
Record low
46°F · September 30, 1974
What September Is Like in Barcelona
- 9 of the 10 warmest Septembers on record in Barcelona have come since 2011.
- September in Barcelona has become 2.4°C (4.4°F) warmer on average: the 2011–2025 average against 1970–1989.
- The coldest September reading, 8°C (46°F) on September 30, 1974, has not been matched in 52 years.
- The September heat record, 33°C (92°F) on September 8, 1994, has stood for 32 years.
At least 1 mm of rain falls on 17% of September days, and the month averages 79 mm in total.
Warmest: 2004 (29.2°C)Latest: 2025 (26.3°C)10-year averageLong-run average (25.9°C)
Look Up a Day in September
See the weather in Barcelona on any September date, year by year.
Source: NOAA GHCN-Daily, Barcelona/Aeropuerto (1971–2026); Barcelona-El Raval (2008–2026). Averages cover 1971–2026. How we compute this