SmogRank / Brazil / São Paulo / São José dos Campos
São José dos Campos, month by month
São José dos Campos has a measured daily mean on 1,245 days since 1 January 2023. Its worst month was September 2024, at 83 US AQI (26.5 µg/m³), 69th of 2,010 cities on that month's world ranking. Its cleanest was January 2023, at 36 US AQI (6.4 µg/m³). 2025 averaged 52 US AQI (9.6 µg/m³), against 58 US AQI (12.7 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
6 months
| Month | Why |
|---|---|
| Oct 2025 | 17 of 31 days measured; a month needs 22. The others: 11 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Nov 2023 | 19 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 4 with readings for part of the day (a day needs 18 hours). |
| May 2023 | 14 of 31 days measured; a month needs 22. The others: 14 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Apr 2023 | 1 of 30 days measured; a month needs 21. The others: 25 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 3 missing from OpenAQ's archive. |
| 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.
São José dos Campos's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2024 | 8326.5 µg/m³ | 69thof 2,010 | Southern Brazil, 30 September to 4 October 2024 Southern Brazil, 22 to 28 September 2024and 2 more |
| August 2024 | 6918.7 µg/m³ | 111thof 2,010 | Southern Brazil, 30 August to 5 September 2024 Southern Brazil, 22 to 25 August 2024and 1 more |
| June 2024 | 6617.2 µg/m³ | 141stof 2,563 | Southern Brazil, 11 to 13 June 2024 Southern Brazil, 7 to 8 June 2024 |
| July 2024 | 6416.2 µg/m³ | 151stof 2,566 | Southern Brazil, 25 to 28 July 2024 |
| June 2023 | 6114.5 µg/m³ | 407thof 1,603 | – |
| August 2023 | 6013.8 µg/m³ | 232ndof 1,980 | São Paulo, Brazil, August 2023 |
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.
São José dos Campos's worst days
| Day | US AQI | Episode |
|---|---|---|
| 8 Sept 2024 | 15358.4 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 10 Sept 2024 | 14051.4 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 9 Sept 2024 | 13348.6 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 18 Aug 2024 | 12445.0 µg/m³ | Southern Brazil, 15 to 22 August 2024 |
| 11 Sept 2024 | 12244.1 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 4 Sept 2024 | 11842.4 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 19 Aug 2024 | 11340.5 µg/m³ | Southern Brazil, 15 to 22 August 2024 |
| 5 Sept 2024 | 10938.9 µg/m³ | Southern Brazil, 30 August to 5 September 2024 |
| 14 Sept 2024 | 10738.0 µg/m³ | Southern Brazil, 7 to 17 September 2024 |
| 20 Aug 2024 | 10436.8 µg/m³ | Southern Brazil, 15 to 22 August 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, São José dos Campos, Brazil, 1 Jan 2023 – 8 Oct 2026. Monitor data from CETESB, read from the publisher; sources listed at smogrank.com/sources. smogrank.com/br/sao-jose-dos-campos/history (accessed 13 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.
São José dos Campos now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).