São Paulo air quality
Brazil · Live AQI and hourly forecast for the next 5 days · updated Sat 21:00 local time
Unhealthy for sensitive groups
Kids, older adults and people with asthma or heart conditions should limit long outdoor exertion.
- Next 24 hours
- 114–198US AQI, highest around Sun 17:00
- Best time outside
- Sun 10:00–13:00US AQI about 115
- PM2.5 vs WHO guideline
- 2.7×41 µg/m³ over 24 h, guideline 15
- Cigarette equivalent
- ≈ 1.9 a dayBerkeley Earth rule of thumb
- European AQI
- Poorlevel 4 of 6
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Pollutants in São Paulo right now
| Pollutant | Now | Next 24 h vs WHO | US AQI band |
|---|---|---|---|
| Fine particles (PM2.5) | 56 µg/m³ | 2.7× | Unhealthy |
| Coarse particles (PM10) | 56 µg/m³ | 0.9× | Moderate |
| Nitrogen dioxide (NO2) | 54 µg/m³ | 0.8× | Good |
| Ozone (O3) | 73 µg/m³ | 2.0× | Good |
| Sulphur dioxide (SO2) | 17 µg/m³ | 0.4× | Good |
| Carbon monoxide (CO) | 502 µg/m³ | 0.1× | Good |
| Desert dust | 0 µg/m³ | ||
| Smoke and haze (aerosol optical depth) | 0.27 | ||
| UV index | 0.0 |
“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM2.5, 45 for PM10, 25 for NO2, 40 for SO2 and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline.
Next 48 hours
Hourly US AQI. Highest 207 around Mon 18:00, lowest 71 around Mon 10:00.
5-day air quality forecast for São Paulo
Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 250.
| Day | US AQI | At worst | PM2.5 avg | |
|---|---|---|---|---|
| Sat 26 Sept | 94–193 | 48 | ||
| Sun 27 Sept | 105–198 | 36 | ||
| Mon 28 Sept | 71–207 | 29 | ||
| Tue 29 Sept | 88–123 | 33 | ||
| Wed 30 Sept | 69–135 | 21 |
Common questions about the air in São Paulo
Is the air in São Paulo safe today?
Not for sensitive groups. Right now the US AQI in São Paulo is 138, which counts as unhealthy for sensitive groups. Kids, older adults and people with asthma or heart conditions should limit long outdoor exertion. It is expected to reach 198 (unhealthy) around Sun 17:00.
When is the best time to be outside in São Paulo?
Sun 10:00–13:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 115. The worst hour is around Sun 17:00, at 198.
What is the main pollutant in São Paulo?
Fine particles (PM2.5). It drives the index right now, at 56 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.
How does São Paulo's air compare with the WHO guideline?
2.7 times the guideline. Over the next 24 hours PM2.5 averages about 41 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. O3 is also forecast above its guideline level.
How many cigarettes is a day of São Paulo's air?
About 1.9 cigarettes. Over the next 24 hours PM2.5 averages about 41 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in São Paulo improve this week?
Tuesday looks cleanest. Its AQI peaks at 123, against 207 on Monday, the worst day in the forecast.
Air quality near São Paulo
- Rio de Janeiro 361 km E
- Buenos Aires 1,675 km SW
- La Paz 2,375 km W
- Santiago 2,585 km SW
- Lima 3,454 km W
- Quito 4,307 km NW
About this forecast
Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (10 km inside Europe), refreshed twice a day. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown; ground stations, where there are any nearby, show what monitors actually measure. The US AQI follows the US EPA scale and the European AQI the EEA bands. Readings for 23.55°S, 46.63°W, updated 2026-09-27 00:00 UTC.