SmogRank / Spain / Galicia / Ourense
Ourense, month by month
Ourense has a measured daily mean on 922 days since 1 January 2023. Its worst month was February 2024, at 84 US AQI (26.9 µg/m³), 127th of 2,486 cities on that month's world ranking. Its cleanest was September 2023, at 11 US AQI (1.9 µg/m³). 2025 averaged 69 US AQI (18.6 µg/m³), against 44 US AQI (8.0 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
19 months
| Month | Why |
|---|---|
| Oct 2026 | 4 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitors, 6 with readings for part of the day (a day needs 18 hours). |
| Sep 2026 | 20 of 30 days measured; a month needs 21. The others: 10 with readings for part of the day (a day needs 18 hours). |
| Aug 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. |
| Jul 2026 | 17 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 8 of 30 days measured; a month needs 21. The others: 22 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 | 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 2025 | 21 of 31 days measured; a month needs 22. The others: 10 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. |
| Oct 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. |
| 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 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Mar 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. |
| Oct 2023 | 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 | 16 of 31 days measured; a month needs 22. The others: 15 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.
Ourense's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2024 | 8426.9 µg/m³ | 127thof 2,486 | Southern Europe, February 2024 |
| December 2023 | 8326.4 µg/m³ | 84thof 2,247 | – |
| January 2024 | 8326.1 µg/m³ | 163rdof 2,385 | – |
| November 2023 | 7924.3 µg/m³ | 51stof 2,243 | – |
| August 2025 | 7823.4 µg/m³ | 150thof 2,901 | Spain, Portugal and Andorra, August 2025 |
| December 2025 | 7723.2 µg/m³ | 401stof 3,006 | – |
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.
Ourense's worst days
| Day | US AQI | Episode |
|---|---|---|
| 15 Aug 2025 | 14051.2 µg/m³ | Spain, Portugal and Andorra, August 2025 |
| 16 Aug 2025 | 11842.6 µg/m³ | Spain, Portugal and Andorra, August 2025 |
| 26 Nov 2023 | 11541.1 µg/m³ | – |
| 6 Feb 2024 | 11440.8 µg/m³ | Southern Europe, February 2024 |
| 7 Feb 2024 | 11340.3 µg/m³ | Southern Europe, February 2024 |
| 17 Aug 2025 | 11240.0 µg/m³ | Spain, Portugal and Andorra, August 2025 |
| 23 Aug 2025 | 11139.6 µg/m³ | – |
| 19 Dec 2023 | 10938.8 µg/m³ | – |
| 14 Dec 2024 | 10938.7 µg/m³ | – |
| 25 Nov 2023 | 10738.0 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, Ourense, Spain, 1 Jan 2023 – 6 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/ourense/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.
Ourense now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 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).