SmogRank / Chile / Los Ríos Region / Valdivia
Valdivia, month by month
Valdivia has a measured daily mean on 1,213 days since 19 March 2023. Its worst month was July 2024, at 157 US AQI (64.1 µg/m³), 14th of 2,566 cities on that month's world ranking. Its cleanest was December 2025, at 58 US AQI (12.6 µg/m³). 2025 averaged 91 US AQI (30.8 µg/m³), against 90 US AQI (30.3 µg/m³) in 2024.
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
2 months
| Month | Why |
|---|---|
| Feb 2026 | 15 of 28 days measured; a month needs 20. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 10 of 31 days measured; a month needs 22. The others: 2 missing from OpenAQ's archive, 1 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.
Valdivia's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 15764.1 µg/m³ | 14thof 2,566 | Southern Chile, July 2024 Chile, July 2024 |
| July 2025 | 15357.8 µg/m³ | 20thof 2,889 | Southern Chile, 29 June to 4 July 2025 |
| August 2024 | 15257.2 µg/m³ | 9thof 2,010 | South-western Chile, 29 August to 1 September 2024 South-western Chile, 24 to 25 August 2024and 2 more |
| June 2025 | 15155.5 µg/m³ | 29thof 2,508 | Southern Chile, 29 June to 4 July 2025 |
| June 2026 | 14954.9 µg/m³ | 36thof 2,497 | – |
| July 2026 | 14854.5 µg/m³ | 30thof 2,784 | Southern Chile, July 2026 |
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.
Valdivia's worst days
| Day | US AQI | Episode |
|---|---|---|
| 3 Jul 2026 | 232157.0 µg/m³ | Southern Chile, July 2026 |
| 2 Jul 2025 | 232156.5 µg/m³ | Southern Chile, 29 June to 4 July 2025 |
| 3 Jul 2025 | 229154.0 µg/m³ | Southern Chile, 29 June to 4 July 2025 |
| 5 Jul 2026 | 222147.0 µg/m³ | Southern Chile, July 2026 |
| 21 May 2026 | 220145.0 µg/m³ | Southern Chile, May 2026 |
| 4 Jul 2026 | 213138.0 µg/m³ | Southern Chile, July 2026 |
| 27 May 2026 | 202127.0 µg/m³ | Chile, May 2026 |
| 26 May 2026 | 199123.5 µg/m³ | Chile, May 2026 |
| 27 May 2024 | 191113.2 µg/m³ | South-western Chile, 24 to 28 May 2024 |
| 30 Jun 2025 | 191113.1 µg/m³ | Southern Chile, 29 June to 4 July 2025 |
Daily means, the highest since 19 Mar 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, Valdivia, Chile, 19 Mar 2023 – 11 Oct 2026. Monitor data from Chile - SINCA via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cl/valdivia/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.
Valdivia 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).