Fine particles
2.7µg/m³Good · 1 hourCAMS model • Open-Meteo
ChillánAir 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.
Chillán - latest available concentrations (October 22, 2026, 22:00 local time): PM2.5: 2.7 µg/m³, PM10: 3.2 µg/m³, O₃: 33 µg/m³, NO₂: 7.6 µg/m³, SO₂: 1.5 µg/m³, CO: 175 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
1 weather warning in effect for Chile
Chillán · Air pollutant concentrations
Data time: October 22, 2026 · 22:00 · local timeParticulate matter
3.2µg/m³Good · 1 hourOzone
33µg/m³Good · 1 hourNitrogen dioxide
7.6µg/m³Good · 1 hourSulphur dioxide
1.5µg/m³Good · 1 hourCarbon monoxide
175µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Chillán
Chillán - air pollution over recent days (2026-08-30 - 2026-10-21)
Concentrations of all available pollutants for this city.
PM2.5Lowest 2.58 2026-10-21Highest 13.51 2026-10-192026-08-30 - 2026-10-21
PM10Lowest 3.45 2026-10-21Highest 14.56 2026-10-192026-08-30 - 2026-10-21
O₃Lowest 38.04 2026-09-02Highest 58.13 2026-10-162026-08-30 - 2026-10-21
NO₂Lowest 2.14 2026-09-05Highest 10.18 2026-10-192026-08-30 - 2026-10-21
SO₂Lowest 0.63 2026-09-05Highest 4.37 2026-08-312026-08-30 - 2026-10-21
COLowest 103 2026-10-21Highest 281.21 2026-09-012026-08-30 - 2026-10-21
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-10-21 | 2026-10-20 | 2026-10-19 | 2026-10-18 | 2026-10-17 | 2026-10-16 | 2026-10-15 | 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 | 2.58 | 5.01 | 13.51 | 10.61 | 6.82 | 11.18 | 8.13 | 5.55 | 3.51 | 3.34 | 8.8 | 7.24 | 10.92 | 5.95 | 4.83 |
| PM10 | 3.45 | 5.34 | 14.56 | 11.08 | 7.8 | 11.47 | 8.43 | 6.98 | 4.43 | 4.18 | 10.71 | 8.73 | 12.04 | 7.35 | 6.05 |
| O₃ | 47.83 | 47.42 | 40.38 | 46.29 | 53.29 | 58.13 | 50.25 | 44.46 | 41.67 | 43.54 | 38.83 | 38.04 | 46.79 | 48.92 | 45.38 |
| NO₂ | 2.32 | 4.08 | 10.18 | 4.96 | 4.5 | 7.12 | 8.45 | 3.56 | 2.14 | 2.75 | 9.48 | 8.61 | 7.38 | 6.18 | 3.41 |
| SO₂ | 0.81 | 1.06 | 1.98 | 1.68 | 2.85 | 3 | 1.81 | 1.32 | 0.63 | 0.8 | 3.15 | 3.79 | 4.34 | 4.37 | 3.6 |
| CO | 103 | 151 | 172.38 | 142.79 | 147.5 | 264.25 | 225.38 | 145.88 | 107.75 | 116.92 | 242.13 | 255.08 | 281.21 | 188.79 | 146.75 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Chillán
Chillán - air pollution history (2015-09 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 4.35 2018-11Highest 78.65 2017-052015-09 - 2020-05
PM10Lowest 19.5 2018-11Highest 109 2016-062015-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 | 2015-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 34.1 | 18.05 | 10.3 | 9.38 | 10.22 | 7.14 | 8.58 | 13.85 | 20.75 | 36.6 | 36.85 | 41.9 | 46 | 28 | 19.15 | 12.1 | 6.71 | — | 4.35 | 10.24 | 21 | 54.3 | 69.75 | 63.95 | 44.55 | 30.15 | 12.95 | 11.7 | 7.83 | 6.91 | 7.24 | 11.72 | 28.3 | 44.9 | 46.5 | 51.1 | 78.65 | 18.6 | 11.2 | 11.6 | 45.8 | 7.25 | 7.91 | 10.27 | 18.4 | 36.5 | 49.3 | 70.1 | 48.2 | 29.8 | 19.75 | 14.75 | 10.84 | 8.46 | 10.59 | 13.85 | 21.7 |
| PM10 | 43.55 | 35.1 | 29.15 | 28 | 28.05 | 22.15 | 23.35 | 26.6 | 32 | 50.6 | 49.65 | 56.3 | 64.7 | 57.25 | 42.1 | 33.45 | 28.05 | — | 19.5 | 25.2 | 32.45 | 72.35 | 85.1 | 76 | 56.9 | 42.65 | 27.15 | 34.3 | 29.05 | 26.1 | 29.35 | 37.75 | 42.15 | 51.55 | 51.55 | 54.35 | 58.6 | 26.45 | 30.35 | 28.45 | 64.2 | 20.3 | 24.9 | 23.1 | 44.3 | 57.4 | 78.6 | 109 | 76.7 | 52.6 | 46.5 | 29.7 | 26.8 | 26.1 | 23.1 | 31.4 | 35 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
Historical data by station 2
AIR QUALITY ARCHIVE · INIA, Chillán
INIA, Chillán
Station code: INIA, Chillán
Monthly monitoring station data.
PM2.5Lowest 1.59 2018-11Highest 71.4 2017-052015-09 - 2020-05
PM10Lowest 15.8 2018-11Highest 64.2 2018-072015-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 | 2015-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 22.2 | 15.5 | 11 | 10.9 | 11.3 | 8.98 | 10.7 | 13.8 | 12.8 | 18.1 | 15 | 16.6 | 23.1 | 19.2 | 17.7 | 13.1 | 7.27 | — | 1.59 | 7.08 | 19.4 | 33.6 | 41.8 | 37.9 | 31.3 | 26.9 | 15.8 | 12.1 | 7.88 | 6.7 | 6.42 | 9.45 | 23.7 | 30.7 | 33 | 36.7 | 71.4 | — | — | — | — | 9.04 | 9.65 | 9.54 | 14 | 25.2 | 25.5 | 34.2 | 25.8 | 19.1 | 25.6 | 22.5 | 14.6 | 11.5 | 14.6 | 11.5 | 18.2 |
| PM10 | 33.9 | 29.8 | 24.7 | 24.3 | 25 | 20.8 | 21.6 | 22.1 | 23.2 | 36.3 | 31.7 | 34.9 | 43.9 | 47 | 37.4 | 32.8 | 31.1 | — | 15.8 | 20.8 | 26.3 | 57.4 | 64.2 | 56.1 | 45.5 | 35.6 | 25.8 | 32.1 | 26.3 | 23.8 | 32.7 | 50.6 | 37.7 | 45.4 | 37.9 | 40.9 | 26.5 | 20.6 | 31.7 | 26.8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗Chile - SINCA
AIR QUALITY ARCHIVE · Puren
Puren
Station code: Puren
Monthly monitoring station data.
PM2.5Lowest 5.3 2019-12Highest 106 2016-062015-09 - 2020-05
PM10Lowest 20.3 2016-12Highest 109 2016-062015-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 | 2015-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 46 | 20.6 | 9.61 | 7.86 | 9.14 | 5.3 | 6.47 | 13.9 | 28.7 | 55.1 | 58.7 | 67.2 | 68.9 | 36.8 | 20.6 | 11.1 | 6.14 | — | 7.11 | 13.4 | 22.6 | 75 | 97.7 | 90 | 57.8 | 33.4 | 10.1 | 11.3 | 7.79 | 7.11 | 8.06 | 14 | 32.9 | 59.1 | 60 | 65.5 | 85.9 | 18.6 | 11.2 | 11.6 | 45.8 | 5.46 | 6.17 | 11 | 22.8 | 47.8 | 73.1 | 106 | 70.6 | 40.5 | 13.9 | 7.01 | 7.07 | 5.42 | 6.58 | 16.2 | 25.2 |
| PM10 | 53.2 | 40.4 | 33.6 | 31.7 | 31.1 | 23.5 | 25.1 | 31.1 | 40.8 | 64.9 | 67.6 | 77.7 | 85.5 | 67.5 | 46.8 | 34.1 | 25 | — | 23.2 | 29.6 | 38.6 | 87.3 | 106 | 95.9 | 68.3 | 49.7 | 28.5 | 36.5 | 31.8 | 28.4 | 26 | 24.9 | 46.6 | 57.7 | 65.2 | 67.8 | 90.7 | 32.3 | 29 | 30.1 | 64.2 | 20.3 | 24.9 | 23.1 | 44.3 | 57.4 | 78.6 | 109 | 76.7 | 52.6 | 46.5 | 29.7 | 26.8 | 26.1 | 23.1 | 31.4 | 35 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗Chile - SINCA
Environment and quality of life ratings · Chillán
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Chillán | Argentina | Uruguay | Paraguay | Bolivia | Montenegro |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 38% | 65% | 65% | 46% | 55% | 53% |
| particulate matter PM2.5 (µg/m³) | 24.5 | — | — | — | — | — |
| Pleasure of spending time in the city | 44% | 64% | 67% | 49% | 40% | 69% |
| particulate matter PM10 (µg/m³) | 48 | — | — | — | — | — |
| Air Pollution | 67% | 42% | 29% | 56% | 64% | 40% |
| Garbage Disposal | 50% | 48% | 34% | 30% | 34% | 42% |
| Availability and quality of drinking water | 100% | 69% | 73% | 57% | 50% | 71% |
| Cleanliness and tidiness | 38% | 43% | 38% | 26% | 32% | 51% |
| Noise and Light pollution | 0% | 53% | 48% | 52% | 59% | 32% |
| Water Pollution | 0% | 55% | 46% | 65% | 66% | 38% |
Air quality in nearby cities
All cities →Chile↗
Talcahuano
PM2.54.5
PM106
µg/m³
PM2.5 · GoodNO₂ 5.7O₃ 44
October 22, 202622:00
Chile↗
Talca
PM2.52.6
PM103.4
µg/m³
PM2.5 · GoodNO₂ 6O₃ 34
October 22, 202622:00
Chile↗
Temuco
PM2.54.6
PM104.8
µg/m³
PM2.5 · GoodNO₂ 16.4O₃ 18
October 22, 202622:00
Chile↗
Rancagua
PM2.58.2
PM1010.1
µg/m³
PM2.5 · FairNO₂ 12.6O₃ 38
October 22, 202622:00
Chile↗
Santiago
PM2.516.1
PM1018.3
µg/m³
PM2.5 · ModerateNO₂ 38.4O₃ 13
October 22, 202622:00
Chile↗
Concepción
PM2.54.5
PM106
µg/m³
PM2.5 · GoodNO₂ 5.7O₃ 44
October 22, 202622:00
Chile↗
Los Ángeles
PM2.53.8
PM104.1
µg/m³
PM2.5 · GoodNO₂ 9.1O₃ 28
October 22, 202622:00
Chile↗
Puente Alto
PM2.516.2
PM1018.6
µg/m³
PM2.5 · ModerateNO₂ 33.2O₃ 42
October 22, 202622:00
Chile · air quality in other cities
WEATHER & SURROUNDINGS
Chillán · weather forecast
Daily maximum and minimum temperatures. Forecast point: -36.6066, -72.1034.
Scroll the forecast to see the following days.
Chillán · October 20, 2026: minimum temperature 12.7°C, maximum 18.6°C. Wind: 34.7 km/h. Humidity: 69%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-10-20 | 18.5 | 12.7 | 18.6 | 15.4 | 4.2 | 9.6 | 69 | 100 |
| 2026-10-21 | 17.9 | 13.1 | 18.6 | 13.1 | 15.1 | 9.3 | 82 | 55 |
| 2026-10-22 | 17.4 | 10.5 | 18 | 10.5 | 13.2 | 7.4 | 84 | 78 |
| 2026-10-23 | 15.3 | 9.1 | 17.3 | 9.1 | 6.9 | 4.9 | 74 | 35 |
| 2026-10-24 | 17.5 | 6.8 | 20 | 9.8 | 0.2 | 5.4 | 64 | 73 |
| 2026-10-25 | 18.4 | 7.5 | 22.3 | 15.4 | 4.3 | 3.4 | 67 | 34 |
| 2026-10-26 | 18.9 | 11 | 21.9 | 13.4 | 1.8 | 3.6 | 66 | 98 |
| 2026-10-27 | 18.6 | 8.2 | 22.1 | 14.3 | 0.1 | 4.4 | 67 | 8 |
| 2026-10-28 | 18.8 | 7.7 | 23.2 | 16 | 0.6 | 4.3 | 61 | 49 |
| 2026-10-29 | 21.2 | 11.6 | 22.9 | 12.4 | 4.1 | 4.4 | 72 | 5 |
| 2026-10-30 | 19.1 | 8.8 | 22.3 | 12.9 | — | 3.9 | 66 | 24 |
| 2026-10-31 | 18.1 | 8 | 22 | 12.5 | 1.3 | 4.3 | 59 | 6 |
| 2026-11-01 | 16.7 | 8.8 | 19.7 | 10.9 | 0.3 | 4.5 | 69 | 100 |
| 2026-11-02 | 17 | 6.7 | 20.4 | 11.8 | 0.1 | 3.4 | 68 | 2 |
| 2026-11-03 | 17.8 | 6.1 | 21.4 | 11.7 | — | 4.7 | 61 | 12 |
| 2026-11-04 | 16.8 | 5.1 | 20.2 | 11.9 | 24.8 | 5.2 | 54 | 9 |
| 2026-11-05 | 15.1 | 5.9 | 17.3 | 9.3 | — | 5 | 64 | 25 |
UV index by day · Chillán
City data.
SPF 30-50, hat and sunglasses are a must. Better to stay in the shade 11:00-15:00.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Chillán · October 22, 2026: UV index: 7.7 .
| Indicator | 2026-10-22 | 2026-10-23 | 2026-10-24 | 2026-10-25 | 2026-10-26 | 2026-10-27 | 2026-10-28 | 2026-10-29 | 2026-10-30 | 2026-10-31 | 2026-11-01 | 2026-11-02 | 2026-11-03 | 2026-11-04 | 2026-11-05 | 2026-11-06 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 7.7 | 7.3 | 7.7 | 8 | 8.1 | 8.1 | 8.2 | 8.2 | 8.2 | 8 | 8.2 | 8.3 | 7.2 | 7.3 | 7.9 | — |
AIR QUALITY QUESTIONS
Chillán · air pollution - questions and answers
What do the latest air quality data show for Chillán?
Chillán - latest available concentrations (October 22, 2026, 22:00 local time): PM2.5: 2.7 µg/m³, PM10: 3.2 µg/m³, O₃: 33 µg/m³, NO₂: 7.6 µg/m³, SO₂: 1.5 µg/m³, CO: 175 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Chillán over the past week?
The highest available daily mean PM2.5 was 13.5 µg/m³ (October 19, 2026). This comparison covers 7 days with data in the seven days before October 22, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Chillán cover?
Available monthly means cover 2015-09 - 2020-05. The tables include PM2.5, PM10. Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.
Is the PM2.5 concentration for Chillán 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 Chillán?
For October 22, 2026, the forecast UV index is 7.7. The UV section also shows the following available days.
What wind speed is forecast for Chillán?
For October 20, 2026, forecast wind speed is 34.7 km/h. The weather table includes wind, temperature and other available parameters for subsequent days.
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.