SmogRank / Spain / Canary Islands / San Sebastián de la Gomera
San Sebastián de la Gomera, month by month
San Sebastián de la Gomera has a measured daily mean on 707 days since 1 January 2023. Its worst month was December 2024, at 73 US AQI (20.7 µg/m³), 237th of 2,616 cities on that month's world ranking. Its cleanest was June 2024, at 20 US AQI (3.6 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
24 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 10 with no readings from the monitor, 1 with under 18 hours of readings or readings that failed our checks. |
| Sep 2026 | No day measured. The others: 30 with no readings from the monitor. |
| Aug 2026 | No day measured. The others: 31 with no readings from the monitor. |
| Jul 2026 | No day measured. The others: 31 with no readings from the monitor. |
| Jun 2026 | No day measured. The others: 30 with no readings from the monitor. |
| May 2026 | No day measured. The others: 31 with no readings from the monitor. |
| Apr 2026 | No day measured. The others: 30 with no readings from the monitor. |
| Mar 2026 | No day measured. The others: 31 with no readings from the monitor. |
| Feb 2026 | No day measured. The others: 28 with no readings from the monitor. |
| Jan 2026 | 3 of 31 days measured; a month needs 22. The others: 22 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours). |
| Aug 2025 | 9 of 31 days measured; a month needs 22. The others: 18 with no readings from the monitor, 4 with readings for part of the day (a day needs 18 hours). |
| Jul 2025 | 14 of 31 days measured; a month needs 22. The others: 16 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Jun 2025 | 18 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 11 with readings for part of the day (a day needs 18 hours). |
| Jan 2025 | 20 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Nov 2024 | No day measured. The others: 1 with no readings from the monitor, 29 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 1 of 31 days measured; a month needs 22. The others: 2 with no readings from the monitor, 28 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 30 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 4 of 31 days measured; a month needs 22. The others: 2 with no readings from the monitor, 25 with readings for part of the day (a day needs 18 hours). |
| Jul 2024 | 11 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 14 with readings for part of the day (a day needs 18 hours), 3 with readings left out by our checks. |
| Mar 2024 | 13 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours). |
| Aug 2023 | 17 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 11 with readings for part of the day (a day needs 18 hours). |
| Mar 2023 | 9 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
| Jan 2023 | 8 of 31 days measured; a month needs 22. The others: 16 with readings for part of the day (a day needs 18 hours), 7 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
San Sebastián de la Gomera's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 7320.7 µg/m³ | 237thof 2,616 | Canary Islands, Spain, December 2024 |
| February 2024 | 7119.6 µg/m³ | 209thof 2,486 | Canary Islands, Spain, 18 to 19 February 2024 Canary Islands, Spain, 14 February 2024and 2 more |
| December 2023 | 6717.5 µg/m³ | 212thof 2,247 | Canary Islands, Spain, 16 to 17 December 2023 Canary Islands, Spain, 11 to 13 December 2023 |
| January 2024 | 6315.8 µg/m³ | 418thof 2,385 | Canary Islands, Spain, 25 to 30 January 2024 Canary Islands, Spain, 23 January 2024 |
| April 2023 | 6114.5 µg/m³ | 175thof 1,622 | Canary Islands, Spain, April 2023 |
| September 2025 | 6014.0 µg/m³ | 369thof 3,104 | Canary Islands, Spain, September 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.
San Sebastián de la Gomera's worst days
| Day | US AQI | Episode |
|---|---|---|
| 13 Dec 2023 | 198122.0 µg/m³ | Canary Islands, Spain, 11 to 13 December 2023 |
| 17 Dec 2024 | 190111.0 µg/m³ | Canary Islands, Spain, December 2024 |
| 14 Feb 2023 | 17691.0 µg/m³ | Canary Islands, Spain, 12 to 15 February 2023 |
| 17 Sept 2025 | 17285.8 µg/m³ | Canary Islands, Spain, September 2025 |
| 18 Dec 2024 | 16575.9 µg/m³ | Canary Islands, Spain, December 2024 |
| 8 Feb 2024 | 16473.8 µg/m³ | Canary Islands, Spain, 8 to 9 February 2024 |
| 11 Apr 2024 | 15865.5 µg/m³ | Canary Islands, Spain, 11 to 12 April 2024 |
| 19 Feb 2024 | 15864.8 µg/m³ | Canary Islands, Spain, 18 to 19 February 2024 |
| 28 Jan 2024 | 15662.2 µg/m³ | Canary Islands, Spain, 25 to 30 January 2024 |
| 24 Nov 2025 | 15460.4 µg/m³ | Canary Islands, Spain, November 2025 |
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, San Sebastián de la Gomera, Spain, 1 Jan 2023 – 3 Jan 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/san-sebastian-de-la-gomera/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.
San Sebastián de la Gomera now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).