Timóteo, month by month
Timóteo has a measured daily mean on 915 days since 1 January 2023. Its worst month was July 2023, at 70 US AQI (19.5 µg/m³), 77th of 1,432 cities on that month's world ranking. Its cleanest was January 2024, at 43 US AQI (7.8 µg/m³). 2025 averaged 60 US AQI (13.8 µg/m³), against 62 US AQI (15.0 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
15 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. |
| Sep 2026 | No day measured. |
| Aug 2026 | No day measured. |
| Jul 2026 | No day measured. |
| Jun 2026 | No day measured. |
| May 2026 | No day measured. |
| Apr 2026 | No day measured. |
| Mar 2026 | No day measured. |
| Feb 2026 | No day measured. |
| Jan 2026 | No day measured. |
| Oct 2024 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | 6 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 6 of 31 days measured; a month needs 22. The others: 25 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.
Timóteo's worst months
| Month | US AQI | World rank |
|---|---|---|
| July 2023 | 7019.5 µg/m³ | 77thof 1,432 |
| August 2023 | 6818.3 µg/m³ | 149thof 1,980 |
| May 2023 | 6717.6 µg/m³ | 121stof 1,600 |
| June 2023 | 6717.5 µg/m³ | 321stof 1,603 |
| April 2023 | 6416.1 µg/m³ | 150thof 1,622 |
| August 2025 | 6416.1 µg/m³ | 304thof 2,901 |
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.
Timóteo's worst days
| Day | US AQI | Episode |
|---|---|---|
| 31 Aug 2024 | 16271.1 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 13 Feb 2024 | 16170.0 µg/m³ | – |
| 30 Aug 2024 | 13850.4 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 3 Sept 2024 | 13448.8 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 1 Sept 2024 | 13147.5 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 2 Sept 2024 | 10537.3 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 25 Aug 2023 | 9432.3 µg/m³ | – |
| 19 Nov 2023 | 9231.3 µg/m³ | – |
| 15 Sept 2024 | 9231.3 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 20 Aug 2024 | 8929.6 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, Timóteo, Brazil, 1 Jan 2023 – 11 Oct 2026. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/br/timoteo/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.
Timóteo 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).