SmogRank / Brazil / São Paulo / Limeira
Limeira, month by month
Limeira has a measured daily mean on 1,108 days since 1 January 2023. Its worst month was September 2024, at 98 US AQI (34.3 µg/m³), 36th of 2,010 cities on that month's world ranking. Its cleanest was January 2026, at 42 US AQI (7.5 µg/m³). 2025 averaged 58 US AQI (12.7 µg/m³), against 62 US AQI (15.2 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
10 months
| Month | Why |
|---|---|
| Oct 2026 | 1 of 11 days measured; a month needs 8. The others: 9 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Mar 2026 | 20 of 31 days measured; a month needs 22. The others: 11 with no readings from the monitor. |
| Mar 2025 | 14 of 31 days measured; a month needs 22. The others: 15 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | No day measured. The others: 31 with no readings from the monitor. |
| Feb 2024 | No day measured. The others: 28 with no readings from the monitor, 1 missing from OpenAQ's archive. |
| Jan 2024 | 2 of 31 days measured; a month needs 22. The others: 29 with no readings from the monitor. |
| Jun 2023 | 9 of 30 days measured; a month needs 21. The others: 19 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours). |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 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 | 19 of 31 days measured; a month needs 22. The others: 4 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 6 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Limeira's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2024 | 9834.3 µg/m³ | 36thof 2,010 | Southern Brazil, 30 September to 4 October 2024 Southern Brazil, 22 to 28 September 2024and 2 more |
| August 2024 | 8225.7 µg/m³ | 62ndof 2,010 | Southern Brazil, 30 August to 5 September 2024 Southern Brazil, 22 to 25 August 2024and 1 more |
| July 2024 | 7421.7 µg/m³ | 90thof 2,566 | – |
| May 2023 | 7220.2 µg/m³ | 102ndof 1,600 | – |
| June 2024 | 7119.9 µg/m³ | 95thof 2,563 | – |
| August 2025 | 7019.3 µg/m³ | 220thof 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.
Limeira's worst days
| Day | US AQI | Episode |
|---|---|---|
| 9 Sept 2024 | 16474.5 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 10 Sept 2024 | 15663.0 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 8 Sept 2024 | 15358.7 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 23 Aug 2024 | 13850.6 µg/m³ | Southern Brazil, 22 to 25 August 2024 |
| 13 Sept 2024 | 12445.0 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 17 Aug 2024 | 12444.8 µg/m³ | Southern Brazil, 15 to 22 August 2024 |
| 20 Aug 2024 | 12444.7 µg/m³ | Southern Brazil, 15 to 22 August 2024 |
| 22 Aug 2024 | 12143.8 µg/m³ | Southern Brazil, 22 to 25 August 2024 Southern Brazil, 15 to 22 August 2024 |
| 18 Aug 2024 | 12143.6 µg/m³ | Southern Brazil, 15 to 22 August 2024 |
| 11 Sept 2024 | 11641.7 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
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, Limeira, Brazil, 1 Jan 2023 – 5 Oct 2026. Monitor data from CETESB, read from the publisher; sources listed at smogrank.com/sources. smogrank.com/br/limeira/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.
Limeira now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).