SmogRank / Spain / Asturias / Gijón
Gijón, month by month
Gijón has a measured daily mean on 963 days since 11 January 2023. Its worst month was December 2025, at 74 US AQI (21.6 µg/m³), 455th of 3,006 cities on that month's world ranking. Its cleanest was July 2023, at 27 US AQI (4.8 µg/m³). 2025 averaged 58 US AQI (12.6 µg/m³), against 52 US AQI (9.6 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
17 months
| Month | Why |
|---|---|
| Oct 2026 | 6 of 12 days measured; a month needs 9. The others: 2 with no readings from the monitors, 4 with readings for part of the day (a day needs 18 hours). |
| Jul 2026 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 9 of 30 days measured; a month needs 21. The others: 21 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. |
| Jan 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 15 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 13 of 31 days measured; a month needs 22. The others: 18 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. |
| Aug 2023 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 7 of 31 days measured; a month needs 22. The others: 14 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.
Gijón's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2025 | 7421.6 µg/m³ | 455thof 3,006 | – |
| February 2023 | 6617.3 µg/m³ | 222ndof 1,129 | Spain, France and Portugal, February 2023 |
| March 2023 | 6215.2 µg/m³ | 79thof 911 | Europe, 4 to 7 March 2023 |
| January 2024 | 6013.7 µg/m³ | 555thof 2,385 | Europe, 27 January to 2 February 2024 |
| February 2025 | 5913.3 µg/m³ | 944thof 2,633 | – |
| September 2025 | 5913.2 µg/m³ | 397thof 3,104 | – |
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.
Gijón's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 Dec 2025 | 15763.6 µg/m³ | – |
| 14 Dec 2025 | 14653.8 µg/m³ | – |
| 15 Dec 2025 | 13448.7 µg/m³ | – |
| 24 Jun 2026 | 12143.7 µg/m³ | Galicia, Asturias and Castille and León, Spain, June 2026 |
| 28 Dec 2025 | 11440.8 µg/m³ | – |
| 9 Nov 2025 | 10737.8 µg/m³ | – |
| 29 Dec 2025 | 9633.0 µg/m³ | – |
| 20 Jan 2026 | 9532.7 µg/m³ | – |
| 21 Feb 2023 | 9331.4 µg/m³ | Spain, France and Portugal, February 2023 |
| 18 Dec 2025 | 9231.0 µg/m³ | – |
Daily means, the highest since 11 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, Gijón, Spain, 11 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/gijon/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.
Gijón now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).