Air quality in Rio de Janeiro today
The air in Rio de Janeiro (Brazil) now and over the next 48 hours: the US AQI and the European AQI, fine particles (PM2.5, PM10), ozone and nitrogen dioxide, compared with the WHO 2021 guidelines, with what it means for outdoor sport, children, older people and open windows.
These numbers are more than 7 hours old, so they are hidden. Open the live map for the current air. Open the air map centred on Rio de Janeiro
AQI right now
Unhealthy. Main pollutant: PM2.5, 1.1× the WHO guideline.
What to do today
- Outdoor sport Move training indoors or keep it short and easy.
- Children, older people, asthma Avoid long or intense activity outdoors; children play inside.
- Windows Keep closed; an air purifier with a HEPA filter helps.
AQI in Rio de Janeiro hour by hour, next 48 hours
- Good
- Moderate
- Unhealthy for sensitive groups
- Unhealthy
- Very unhealthy
- Hazardous
Cleanest hour in the next 24 h: Sun 20:00 (AQI 67). Worst hour: Sat 21:00 (AQI 160).
US AQI per hour, local time. Bars coloured by category.
Compared with the WHO 2021 guidelines
| Pollutant | Next 24 h | WHO guideline | Ratio |
|---|---|---|---|
| PM2.5 | 17 µg/m³ | 15 µg/m³ | 1.1× |
| PM10 | 18 µg/m³ | 45 µg/m³ | within |
| Nitrogen dioxide (NO₂) | 16 µg/m³ | 25 µg/m³ | within |
| Ozone (O₃) | 108 µg/m³ | 100 µg/m³ | 1.1× |
PM2.5, PM10 and NO₂: 24-hour mean of the forecast against the 24-hour guideline; ozone: highest 8-hour mean against the 8-hour guideline.
Forecast for Sat 21:00 local time · updated 2026-10-25 00:41 UTC
Air quality map around Rio de Janeiro
Live PM2.5 field (NOAA GEFS-Aerosols): a different model, so it can disagree with the numbers above by a few units.
More about Rio de Janeiro
Rio de Janeiro: all live layers · UV index in Rio de Janeiro today
Bad air alert for Rio de Janeiro
Air quality alerts are part of LayEarth Pro: one push the evening before the forecast US AQI in your city goes above your level, so you can move a run, a school trip or an open window in time. 7-day free trial, then 9 USD a month.
Questions
- What is the AQI in Rio de Janeiro right now?
- US AQI 160 (Unhealthy), European AQI 53; PM2.5 38 µg/m³ (Sat 21:00).
- Is it safe to exercise outdoors in Rio de Janeiro today?
- Move training indoors or keep it short and easy.
- What is the main pollutant in Rio de Janeiro?
- PM2.5, 1.1× the WHO guideline.
- Where do the numbers come from?
- The CAMS global air-quality forecast of the Copernicus Atmosphere Monitoring Service, read through Open-Meteo: a model on a ~40 km grid, not a monitoring station. Where a nearby monitor disagrees, the monitor is right.
Nearby cities
Búzios · Belo Horizonte · São Paulo · Campinas · Curitiba · Florianópolis
How it is computed
Hourly CAMS forecast (Copernicus) for the coordinates of Rio de Janeiro via Open-Meteo; US AQI per the US EPA breakpoints, European AQI per the EEA bands, WHO 2021 air-quality guidelines. The page is rebuilt every 3 hours. Live map.