SmogRank / Spain / Madrid / Madrid
Madrid, month by month
Madrid has a measured daily mean on 1,015 days since 1 January 2023. Its worst month was August 2025, at 66 US AQI (17.2 µg/m³), 271st of 2,901 cities on that month's world ranking. Its cleanest was March 2025, at 26 US AQI (4.6 µg/m³). 2025 averaged 49 US AQI (8.9 µg/m³), against 50 US AQI (9.0 µg/m³) in 2023.
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
12 months
| Month | Why |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitors, 3 with readings for part of the day (a day needs 18 hours). |
| Jul 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 2026 | 1 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 2 of 31 days measured; a month needs 22. The others: 29 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 | 8 of 28 days measured; a month needs 20. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 14 of 31 days measured; a month needs 22. The others: 17 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 | 7 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 14 of 31 days measured; a month needs 22. The others: 17 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.
Madrid's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2025 | 6617.2 µg/m³ | 271stof 2,901 | Spain, Portugal and Andorra, August 2025 |
| June 2025 | 5812.8 µg/m³ | 688thof 2,508 | – |
| December 2023 | 5712.2 µg/m³ | 420thof 2,247 | Spain, France and 2 more countries, December 2023 to January 2024 |
| January 2024 | 5410.9 µg/m³ | 798thof 2,385 | Spain, France and 2 more countries, December 2023 to January 2024 |
| August 2026 | 5410.9 µg/m³ | 718thof 2,896 | – |
| February 2025 | 5410.7 µg/m³ | 1,121stof 2,633 | – |
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.
Madrid's worst days
| Day | US AQI | Episode |
|---|---|---|
| 19 Aug 2025 | 13047.3 µg/m³ | Spain, Portugal and Andorra, August 2025 |
| 31 Oct 2024 | 12143.8 µg/m³ | Northern Spain, October 2024 |
| 18 Aug 2025 | 9633.4 µg/m³ | Spain, Portugal and Andorra, August 2025 |
| 26 Dec 2023 | 9029.8 µg/m³ | Spain, France and 2 more countries, December 2023 to January 2024 |
| 9 Aug 2026 | 8929.4 µg/m³ | – |
| 22 Feb 2023 | 8828.7 µg/m³ | Spain, France and Portugal, February 2023 |
| 20 Aug 2025 | 8728.3 µg/m³ | Spain, Portugal and Andorra, August 2025 |
| 29 Dec 2023 | 8628.1 µg/m³ | Spain, France and 2 more countries, December 2023 to January 2024 |
| 28 Dec 2023 | 8527.5 µg/m³ | Spain, France and 2 more countries, December 2023 to January 2024 |
| 14 Jan 2023 | 8527.1 µg/m³ | – |
Daily means, the highest since 1 Jan 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, Madrid, Spain, 1 Jan 2023 – 9 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/madrid/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.
Madrid now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).