Fine particles
60.3µg/m³Poor · 1 hourCAMS model • Open-Meteo
Rio de JaneiroAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
Rio de Janeiro - latest available concentrations (September 26, 2026, 22:00 local time): PM2.5: 60.3 µg/m³, PM10: 62.2 µg/m³, O₃: 71 µg/m³, NO₂: 42.3 µg/m³, SO₂: 13.1 µg/m³, CO: 370 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →Rio de Janeiro · Air pollutant concentrations
Data time: September 26, 2026 · 22:00 · local timeParticulate matter
62.2µg/m³Moderate · 1 hourOzone
71µg/m³Fair · 1 hourNitrogen dioxide
42.3µg/m³Moderate · 1 hourSulphur dioxide
13.1µg/m³Good · 1 hourCarbon monoxide
370µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Rio de Janeiro
Rio de Janeiro - air pollution over recent days (2026-08-30 - 2026-09-25)
Concentrations of all available pollutants for this city.
PM2.5Lowest 9.66 2026-09-19Highest 28.23 2026-09-052026-08-30 - 2026-09-25
PM10Lowest 12.03 2026-09-19Highest 31.53 2026-09-052026-08-30 - 2026-09-25
O₃Lowest 44.08 2026-09-23Highest 134.75 2026-08-302026-08-30 - 2026-09-25
NO₂Lowest 11.53 2026-09-06Highest 30.05 2026-09-012026-08-30 - 2026-09-25
SO₂Lowest 4.15 2026-09-20Highest 9.32 2026-09-222026-08-30 - 2026-09-25
COLowest 114.54 2026-09-06Highest 453 2026-09-212026-08-30 - 2026-09-25
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-25 | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 2026-09-19 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 | 2026-08-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 19.57 | 15.4 | 14.2 | 22.76 | 14.94 | 10.28 | 9.66 | 11.72 | 28.23 | 21.34 | 21.34 | 17.16 | 20.25 | 18.07 | 24.46 |
| PM10 | 21.89 | 19.22 | 18.33 | 23.88 | 16.07 | 12.09 | 12.03 | 15.5 | 31.53 | 23.31 | 25 | 22.54 | 21.15 | 19.52 | 26.58 |
| O₃ | 47.33 | 44.46 | 44.08 | 85.04 | 44.75 | 51.25 | 49.58 | 63.5 | 113.17 | 86.25 | 58.92 | 76.04 | 80.46 | 93.17 | 134.75 |
| NO₂ | 24.16 | 21.83 | 23.1 | 27.5 | 25.2 | 12.1 | 12.36 | 11.53 | 19.22 | 29.44 | 28.75 | 20.21 | 30.05 | 24.12 | 14.13 |
| SO₂ | 6.56 | 6.6 | 5.61 | 9.32 | 6.33 | 4.15 | 4.28 | 5.31 | 8.13 | 7.15 | 7.22 | 6.93 | 8.03 | 9.08 | 7.84 |
| CO | 269.71 | 157.5 | 147.92 | 437.63 | 453 | 168.38 | 131.88 | 114.54 | 244.5 | 377.04 | 257.75 | 169.96 | 294.08 | 341.17 | 286.79 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
Environment and quality of life ratings · Rio de Janeiro
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Rio de Janeiro | Paraguay | Bolivia | Montenegro | Suriname | Uruguay |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 53% | 46% | 55% | 53% | 40% | 65% |
| particulate matter PM2.5 (µg/m³) | 11 | — | — | — | — | — |
| Pleasure of spending time in the city | 52% | 49% | 40% | 69% | 63% | 67% |
| particulate matter PM10 (µg/m³) | 42 | — | — | — | — | — |
| Air Pollution | 53% | 56% | 64% | 40% | 39% | 29% |
| Garbage Disposal | 32% | 30% | 34% | 42% | 50% | 34% |
| Availability and quality of drinking water | 46% | 57% | 50% | 71% | 64% | 73% |
| Cleanliness and tidiness | 30% | 26% | 32% | 51% | 36% | 38% |
| Noise and Light pollution | 63% | 52% | 59% | 32% | 34% | 48% |
| Water Pollution | 78% | 65% | 66% | 38% | 57% | 46% |
Air quality in nearby cities
All cities →Brazil↗
Duque de Caxias
PM2.560.3
PM1062.2
µg/m³
PM2.5 · PoorNO₂ 42.3O₃ 71
September 26, 202622:00
Brazil↗
Nova Iguaçu
PM2.560.3
PM1062.4
µg/m³
PM2.5 · PoorNO₂ 32.8O₃ 64
September 26, 202622:00
Brazil↗
Belo Horizonte
PM2.515.8
PM1016.6
µg/m³
PM2.5 · ModerateNO₂ 30.8O₃ 22
September 26, 202622:00
Brazil↗
Guarulhos
PM2.562.4
PM1062.6
µg/m³
PM2.5 · PoorNO₂ 39.8O₃ 75
September 26, 202622:00
Brazil↗
São Paulo
PM2.559.1
PM1059.4
µg/m³
PM2.5 · PoorNO₂ 49.9O₃ 79
September 26, 202622:00
Brazil↗
Campinas
PM2.571.5
PM1074
µg/m³
PM2.5 · PoorNO₂ 76.3O₃ 24
September 26, 202622:00
Brazil↗
Curitiba
PM2.521.3
PM1021.8
µg/m³
PM2.5 · ModerateNO₂ 22.5O₃ 53
September 26, 202622:00
Brazil↗
Brasília
PM2.515.1
PM1015.6
µg/m³
PM2.5 · ModerateNO₂ 36.8O₃ 35
September 26, 202622:00
Brazil · air quality in other cities
WEATHER & SURROUNDINGS
Brazil · weather forecast
Daily maximum and minimum temperatures. Forecast point: -14.235, -51.9253. Forecast for a country reference point; conditions in the city may differ.
Scroll the forecast to see the following days.
Brazil · September 24, 2026: minimum temperature 23.8°C, maximum 42.2°C. Wind: 17.9 km/h. Humidity: 21%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-24 | 39.9 | 23.8 | 42.2 | 27.5 | 0.1 | 5 | 21 | 5 |
| 2026-09-25 | 40.5 | 24.9 | 42.6 | 28.9 | 0.8 | 2.6 | 21 | 2 |
| 2026-09-26 | 39.4 | 25.7 | 40.9 | 29.3 | 0.2 | 2.2 | 24 | 26 |
| 2026-09-27 | 42.7 | 26.7 | 42.9 | 30.9 | 0.2 | 2.4 | 19 | 1 |
| 2026-09-28 | 42 | 30.4 | 44.1 | 30.7 | 0.4 | 4.1 | 14 | 48 |
| 2026-09-29 | 41.7 | 28.5 | 42.5 | 30.4 | 0.3 | 2.7 | 19 | 3 |
| 2026-09-30 | 43.6 | 27.2 | 43.6 | 30.8 | 0.8 | 3.4 | 13 | 8 |
| 2026-10-01 | 34.2 | 21.6 | 36.4 | 21.6 | 2.5 | 4.5 | 37 | 100 |
| 2026-10-02 | 29.2 | 21.1 | 29.2 | 21.1 | 0.9 | 3.7 | 46 | 89 |
| 2026-10-03 | 39.5 | 19.8 | 40.1 | 26.9 | 0.2 | 1.6 | 25 | 2 |
| 2026-10-04 | 38.5 | 23.5 | 38.5 | 25.7 | 2.1 | 2.8 | 28 | 40 |
| 2026-10-05 | 29 | 22.6 | 34.3 | 22.6 | 0.5 | 3.2 | 56 | 100 |
| 2026-10-06 | 37.7 | 23 | 37.7 | 25.3 | 0.1 | 3.1 | 31 | 98 |
| 2026-10-07 | 38.7 | 24.1 | 38.9 | 27.8 | 0.5 | 3.3 | 25 | 100 |
| 2026-10-08 | 38.6 | 24.8 | 40.1 | 25.8 | 0.1 | 3.5 | 24 | 99 |
| 2026-10-09 | 40.8 | 24.6 | 41.5 | 27.9 | — | 3.8 | 18 | 96 |
| 2026-10-10 | 40.9 | 25.9 | 40.9 | 28.1 | — | 3.7 | 19 | 5 |
UV index by day · Brazil
Data for a country reference point. Local conditions may differ.
SPF 50, long sleeves and shade between 10:00-16:00.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Brazil · September 26, 2026: UV index: 8.9 .
| Indicator | 2026-09-26 | 2026-09-27 | 2026-09-28 | 2026-09-29 | 2026-09-30 | 2026-10-01 | 2026-10-02 | 2026-10-03 | 2026-10-04 | 2026-10-05 | 2026-10-06 | 2026-10-07 | 2026-10-08 | 2026-10-09 | 2026-10-10 | 2026-10-11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 8.9 | 8.9 | 9 | 9 | 8.8 | 8.3 | 8.1 | 9.2 | 7.9 | 7.1 | 7.7 | 7.4 | 9.1 | 7.9 | 8.1 | — |
AIR QUALITY QUESTIONS
Rio de Janeiro · air pollution - questions and answers
What do the latest air quality data show for Rio de Janeiro?
Rio de Janeiro - latest available concentrations (September 26, 2026, 22:00 local time): PM2.5: 60.3 µg/m³, PM10: 62.2 µg/m³, O₃: 71 µg/m³, NO₂: 42.3 µg/m³, SO₂: 13.1 µg/m³, CO: 370 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Rio de Janeiro over the past week?
The highest available daily mean PM2.5 was 22.8 µg/m³ (September 22, 2026). This comparison covers 7 days with data in the seven days before September 26, 2026. The day of the latest reading is excluded because it may be incomplete.
Is the PM2.5 concentration for Rio de Janeiro an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Rio de Janeiro?
For September 26, 2026, the forecast UV index is 8.9. The UV section also shows the following available days. The forecast is for a country reference point (Brazil), not the city itself.
What wind speed is forecast for Rio de Janeiro?
For September 24, 2026, forecast wind speed is 17.9 km/h. The weather table includes wind, temperature and other available parameters for subsequent days. These data describe a country reference point (Brazil); local wind may differ.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.