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Rio de Janeiro air quality

Brazil · Live AQI and hourly forecast for the next 5 days · updated Sat 21:00 local time

151

Unhealthy

US AQI, mostly PM2.5

Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.

Next 24 hours
85–190US AQI, highest around Sun 17:00
Best time outside
Sun 00:00–3:00US AQI about 87
PM2.5 vs WHO guideline
2.9×43 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 2.0 a dayBerkeley Earth rule of thumb
European AQI
Moderatelevel 3 of 6

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The live globe, centred on Rio de Janeiro. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Rio de Janeiro right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 46 µg/m³ 2.9× Sensitive
Coarse particles (PM10) 48 µg/m³ 1.0× Good
Nitrogen dioxide (NO2) 46 µg/m³ 0.7× Good
Ozone (O3) 79 µg/m³ 2.0× Good
Sulphur dioxide (SO2) 13 µg/m³ 0.3× Good
Carbon monoxide (CO) 303 µg/m³ 0.1× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.25
UV index0.0

“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 190 around Sun 17:00, lowest 73 around Mon 16:00.

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Rio de Janeiro

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 200.

DayUS AQIAt worstWorst hourPM2.5 avgUV max
Sat 26 Sept 68–175 Unhealthy 18:00 27 10
Sun 27 Sept 85–190 Unhealthy 17:00 40 4.8
Mon 28 Sept 69–110 Sensitive 0:00 20 8.1
Tue 29 Sept 70–86 Moderate 17:00 20 11
Wed 30 Sept 67–193 Unhealthy 17:00 24 11

Common questions about the air in Rio de Janeiro

  1. Is the air in Rio de Janeiro safe today?

    No. Right now the US AQI in Rio de Janeiro is 151, which counts as unhealthy. Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.

  2. When is the best time to be outside in Rio de Janeiro?

    Sun 00:00–3:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 87. The worst hour is around Sun 17:00, at 190.

  3. What is the main pollutant in Rio de Janeiro?

    Fine particles (PM2.5). It drives the index right now, at 46 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

  4. How does Rio de Janeiro's air compare with the WHO guideline?

    2.9 times the guideline. Over the next 24 hours PM2.5 averages about 43 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM10 and O3 are also forecast above their guideline levels.

  5. How many cigarettes is a day of Rio de Janeiro's air?

    About 2.0 cigarettes. Over the next 24 hours PM2.5 averages about 43 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

  6. Will air quality in Rio de Janeiro improve this week?

    Tuesday looks cleanest. Its AQI peaks at 86, against 193 on Wednesday, the worst day in the forecast.

Air quality near Rio de Janeiro

All 161 cities

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 22.91°S, 43.17°W, updated 2026-09-27 00:00 UTC.