São José dos Campos Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (10 October): Air quality in São José dos Campos is fair. AQI, PM2.5, and PM10 are fair; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (PM2.5: 28.8/100).
Air Quality Tomorrow
Tomorrow (11 October 2026): Air quality in São José dos Campos is fair. All pollutants stay as today. Pollution peaks around 8:00 PM (PM2.5: 29.4/100).
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Air Quality
Today - 10 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 28.8/100 |
| PM2.5 (fine particles) | Fair | 28.8/100 |
| PM10 (coarse particles) | Fair | 23.3/100 |
| NO2 (nitrogen dioxide) | Good | 0.1/100 |
| O3 (ozone) | Good | 13.7/100 |
| SO2 (sulfur dioxide) | Good | 0.2/100 |
| CO (carbon monoxide) | Good | 0.3/100 |
| HCHO (formaldehyde) | Good | 0.5/100 |
| PM1 (ultrafine particles) | Good | 5.4/100 |
Tomorrow - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 29.4/100 |
| PM2.5 (fine particles) | Fair | 29.4/100 |
| PM10 (coarse particles) | Fair | 23.5/100 |
| NO2 (nitrogen dioxide) | Good | 0.2/100 |
| O3 (ozone) | Good | 13.9/100 |
| SO2 (sulfur dioxide) | Good | 0.1/100 |
| CO (carbon monoxide) | Good | 0.3/100 |
| HCHO (formaldehyde) | Good | 0.5/100 |
| PM1 (ultrafine particles) | Good | 8.2/100 |
Local Environmental Conditions
Around the heart of São José dos Campos, dense development means road traffic is the main local source of nitrogen dioxide and fine particles. Its setting in a valley at around 590 m means cold air and pollution can get trapped close to the ground during calm spells. Manufacturing adds to local emissions.
Even in the mild winter months, June to August, at around 17°C, calm nights let traffic pollution settle in the valley. In the warmer months, ozone is the main concern from September to April, when sunny days averaging 23°C turn traffic and other emissions into ozone by mid-afternoon. From May to August, dry weather raises the risk of wildfires, and their smoke can cover the area in haze.
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Frequently Asked Questions About Air Quality in São Paulo
Is air quality bad in São José dos Campos right now?
On 10 October 2026, overall air quality in São José dos Campos is fair. AQI is the main air quality indicator at 28.8/100. Pollution peaks around 10:00 AM (PM2.5: 28.8/100).
Will air quality be worse tomorrow in São José dos Campos?
On 11 October 2026, air quality conditions in São José dos Campos will be similar to today, with AQI forecast at fair at 29.4/100. Pollution peaks around 8:00 PM (PM2.5: 29.4/100).
When is air pollution at its worst in São José dos Campos?
Even in the mild winter months, June to August, at around 17°C, calm nights let traffic pollution settle in the valley. In the warmer months, ozone is the main concern from September to April, when sunny days averaging 23°C turn traffic and other emissions into ozone by mid-afternoon. From May to August, dry weather raises the risk of wildfires, and their smoke can cover the area in haze.
Are air quality levels in São José dos Campos based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |