SmogRank / Spain / Catalonia / Barcelona
Barcelona, month by month
Barcelona has a measured daily mean on 620 days since 5 October 2023. Its worst month was February 2025, at 61 US AQI (14.6 µg/m³), 885th of 2,633 cities on that month's world ranking. Its cleanest was November 2025, at 38 US AQI (6.8 µg/m³).
Every month since 2023
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Months without a mean, and why
17 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 3 with no readings from the monitors, 8 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks. |
| Sep 2026 | No day measured. The others: 12 with no readings from the monitors, 18 with readings for part of the day (a day needs 18 hours). |
| Aug 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 12 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Barcelona's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6114.6 µg/m³ | 885thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| August 2025 | 6114.5 µg/m³ | 399thof 2,901 | – |
| January 2024 | 6114.2 µg/m³ | 520thof 2,385 | Europe, 27 January to 2 February 2024 Spain, France and 2 more countries, December 2023 to January 2024 |
| February 2024 | 6013.7 µg/m³ | 386thof 2,486 | Southern Europe, February 2024 Europe, 27 January to 2 February 2024and 2 more |
| December 2023 | 5813.0 µg/m³ | 359thof 2,247 | Spain, France and 2 more countries, December 2023 to January 2024 |
| December 2024 | 5611.8 µg/m³ | 689thof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Barcelona's worst days
| Day | US AQI | Episode |
|---|---|---|
| 24 Jun 2025 | 13649.9 µg/m³ | – |
| 27 Jan 2024 | 10537.0 µg/m³ | Europe, 27 January to 2 February 2024 |
| 25 Jan 2024 | 9532.9 µg/m³ | – |
| 30 Dec 2023 | 9432.0 µg/m³ | Spain, France and 2 more countries, December 2023 to January 2024 |
| 26 Jan 2024 | 9331.8 µg/m³ | – |
| 14 Nov 2025 | 8929.7 µg/m³ | North-eastern Spain and Andorra, November 2025 |
| 7 Feb 2024 | 8829.0 µg/m³ | Southern Europe, February 2024 |
| 20 Nov 2023 | 8728.3 µg/m³ | – |
| 29 Dec 2023 | 8627.9 µg/m³ | Spain, France and 2 more countries, December 2023 to January 2024 |
| 6 Feb 2025 | 8627.8 µg/m³ | Europe, 1 to 14 February 2025 |
Daily means, the highest since 5 Oct 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Barcelona, Spain, 5 Oct 2023 – 21 Jan 2026. Monitor data from EEA and Catalonia Medi Ambient I Sostenibilitat, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/barcelona/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Barcelona now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).