SmogRank / Brazil / São Paulo / Campinas
Campinas, month by month
Campinas has a measured daily mean on 1,279 days since 1 January 2023. Its worst month was September 2024, at 105 US AQI (37.2 µg/m³), 23rd of 2,010 cities on that month's world ranking. Its cleanest was January 2025, at 43 US AQI (7.8 µg/m³). 2025 averaged 54 US AQI (10.9 µg/m³), against 67 US AQI (17.8 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
4 months
| Month | Why |
|---|---|
| May 2026 | 19 of 31 days measured; a month needs 22. The others: 11 with no readings from the monitors, 1 with readings for part of the day (a day needs 18 hours). |
| Sep 2025 | 19 of 30 days measured; a month needs 21. The others: 11 with no readings from the monitors. |
| 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Campinas's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2024 | 10537.2 µg/m³ | 23rdof 2,010 | Southern Brazil, 30 September to 4 October 2024 Southern Brazil, 22 to 28 September 2024and 2 more |
| August 2024 | 8426.9 µg/m³ | 54thof 2,010 | Southern Brazil, 30 August to 5 September 2024 Southern Brazil, 22 to 25 August 2024and 1 more |
| July 2024 | 7622.5 µg/m³ | 86thof 2,566 | Southern Brazil, 25 to 28 July 2024 Southern Brazil, 4 to 5 July 2024 |
| June 2024 | 7521.8 µg/m³ | 78thof 2,563 | São Paulo, Minas Gerais and Rio de Janeiro, Brazil, June 2024 Southern Brazil, 11 to 13 June 2024and 1 more |
| August 2023 | 7120.0 µg/m³ | 125thof 1,980 | São Paulo, Brazil, August 2023 |
| May 2024 | 7119.8 µg/m³ | 154thof 2,684 | – |
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.
Campinas's worst days
| Day | US AQI | Episode |
|---|---|---|
| 9 Sept 2024 | 16880.1 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 10 Sept 2024 | 16169.7 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 8 Sept 2024 | 16067.8 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 3 Sept 2024 | 15560.8 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 11 Sept 2024 | 15459.5 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 5 Sept 2024 | 15358.9 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 23 Aug 2024 | 14955.0 µg/m³ | Southern Brazil, 22 to 25 August 2024 |
| 2 Sept 2024 | 14553.3 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 12 Sept 2024 | 14252.1 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 4 Sept 2024 | 13649.8 µg/m³ | Southern Brazil, 30 August to 5 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, Campinas, Brazil, 1 Jan 2023 – 11 Oct 2026. Monitor data from CETESB, read from the publisher; sources listed at smogrank.com/sources. smogrank.com/br/campinas/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.
Campinas 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).