Fine particles
15.3µg/m³Moderate · 1 hourCAMS model • Open-Meteo
SantiagoAir 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.
Santiago - latest available concentrations (September 26, 2026, 22:00 local time): PM2.5: 15.3 µg/m³, PM10: 16 µg/m³, O₃: 23 µg/m³, NO₂: 23.8 µg/m³, SO₂: 20.3 µg/m³, CO: 413 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →Santiago · Air pollutant concentrations
Data time: September 26, 2026 · 22:00 · local timeParticulate matter
16µg/m³Fair · 1 hourOzone
23µg/m³Good · 1 hourNitrogen dioxide
23.8µg/m³Fair · 1 hourSulphur dioxide
20.3µg/m³Fair · 1 hourCarbon monoxide
413µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Santiago
Santiago - air pollution over recent days (2026-08-30 - 2026-09-25)
Concentrations of all available pollutants for this city.
PM2.5Lowest 16.25 2026-09-20Highest 77.32 2026-09-242026-08-30 - 2026-09-25
PM10Lowest 18.52 2026-09-20Highest 80.35 2026-09-242026-08-30 - 2026-09-25
O₃Lowest 44.04 2026-09-21Highest 115.42 2026-09-022026-08-30 - 2026-09-25
NO₂Lowest 14.61 2026-09-20Highest 69.39 2026-09-242026-08-30 - 2026-09-25
SO₂Lowest 21.53 2026-09-20Highest 66.9 2026-09-242026-08-30 - 2026-09-25
COLowest 183.54 2026-09-20Highest 1,679.46 2026-09-022026-08-30 - 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 | 60.82 | 77.32 | 53.26 | 30.38 | 18.16 | 16.25 | 43.01 | 49.93 | 51.13 | 28.37 | 49.12 | 60.12 | 50.56 | 25.03 | 33.53 |
| PM10 | 62.53 | 80.35 | 55.55 | 31.2 | 20.07 | 18.52 | 43.79 | 50.29 | 51.39 | 28.58 | 49.49 | 60.44 | 50.68 | 25.16 | 33.71 |
| O₃ | 51.83 | 54.67 | 72.92 | 65.13 | 44.04 | 56.42 | 67.75 | 110.46 | 79.92 | 62.67 | 84 | 115.42 | 91.88 | 76.71 | 72.08 |
| NO₂ | 64.58 | 69.39 | 52.8 | 38.76 | 25.93 | 14.61 | 38.6 | 39.23 | 49.23 | 37.96 | 45.04 | 61.79 | 59.16 | 32.28 | 29.97 |
| SO₂ | 58.7 | 66.9 | 49.87 | 38.38 | 31.62 | 21.53 | 43.08 | 47.46 | 44.36 | 33.33 | 48.84 | 58.93 | 55.69 | 40.94 | 37.41 |
| CO | 1,140.21 | 1,272.79 | 970.54 | 929.29 | 616.38 | 183.54 | 807.25 | 495 | 905.04 | 1,531.17 | 887.75 | 1,679.46 | 1,577.83 | 1,170.83 | 451.79 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Santiago
Santiago - air pollution history (2015-09 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 13.3 2018-10Highest 52.75 2016-062015-09 - 2020-05
PM10Lowest 40.6 2018-11Highest 117 2019-072015-09 - 2020-05
O₃Lowest 6.33 2016-06Highest 53.3 2019-022015-09 - 2020-05
NO₂Lowest 20.13 2020-03Highest 95.8 2018-062015-09 - 2020-05
SO₂Lowest 17.3 2015-09Highest 17.3 2015-092015-09 - 2020-05
COLowest 1 2017-05Highest 921.5 2016-082015-09 - 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 | 27.55 | 21.1 | 14.2 | 16.5 | 15.75 | 13.35 | 13.6 | 16.2 | 18.75 | 32.85 | 51.6 | 37.7 | 29.95 | 29.55 | 17.45 | 21.55 | 19.9 | — | 14.35 | 13.3 | 26.2 | 39.1 | 39.4 | 48.2 | 35.95 | 24.05 | 16.6 | 16.25 | 15.65 | 15.3 | 16.8 | 16.35 | 22.5 | 26.65 | 46.2 | 43.2 | 35.3 | 20.45 | 16.25 | 19.35 | 37 | 21.65 | 16.35 | 14.25 | 27.4 | 35.65 | 43.55 | 52.75 | 42.15 | 24.85 | 24.45 | 14.55 | 16.3 | 16.4 | 16.55 | 16.1 | 22.95 |
| PM10 | 81.7 | 72.65 | 65.95 | 64.6 | 61.85 | 56.45 | 57.45 | 53.4 | 85.65 | 91.1 | 117 | 96.95 | 90.1 | 91.4 | 54.4 | 49.6 | 49.95 | — | 40.6 | 49.6 | 62.05 | 76.6 | 66.55 | 94.6 | 95.85 | 81.5 | 76.95 | 56.65 | 53.8 | 52.1 | 49.9 | 47.95 | 63.5 | 63.65 | 105.85 | 84 | 70.35 | 65.6 | 66.55 | 56.8 | 77.8 | 53.35 | 52.65 | 44 | 70.15 | 71.15 | 80.05 | 83.75 | 68.55 | 60.65 | 74.7 | 54.65 | 51.75 | 51.95 | 43.65 | 41.2 | 49.15 |
| O₃ | 41 | 45.25 | 48.25 | 46.95 | 51.4 | 48.6 | 48.25 | 38.3 | 34.85 | 18.95 | 12.29 | 8.88 | 16.25 | 36.3 | 40.45 | 53.3 | 45.65 | — | 36.6 | 31.45 | 28.1 | 19.35 | 11.3 | 9.48 | 16.6 | 27.95 | 37.65 | 46.15 | 49.35 | 40.1 | 43.3 | 35.5 | 29.85 | 17 | 11.49 | 7.45 | 9.28 | 21.05 | 35.5 | 39 | 51.7 | 37.45 | 35.7 | 30.75 | 32.15 | 18.05 | 8.65 | 6.33 | 9.63 | 16.8 | 34.2 | 40.25 | 28.9 | 42.1 | 28.05 | 27.05 | 28.6 |
| NO₂ | 32.85 | 23.34 | 20.13 | 26.8 | 29.45 | 32.25 | 27.35 | 31.95 | 40.6 | 68.7 | 81.5 | 84.05 | 76.8 | 76.25 | 51.6 | 38.7 | 35.25 | — | 35.4 | 34.85 | 64.25 | 66.75 | 85.8 | 95.8 | 75.2 | 60.15 | 49.2 | 33.25 | 29.25 | 42.3 | 33.95 | 31.7 | 53.65 | 54.3 | 73.5 | 67.85 | 62.25 | 54.2 | 41.55 | 32.2 | 37.95 | 27.9 | 29.35 | 34.95 | 54.25 | 47.5 | 54 | 61.15 | 60 | 59.8 | 50.9 | 37.15 | 36.3 | 34.15 | 27.8 | 33 | 47.15 |
| SO₂ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 17.3 |
| CO | 894 | 632.5 | 762 | 732 | 426 | 642 | 517.5 | 533 | 593.5 | 373.5 | 1 | 1 | 1 | 753.5 | 260.5 | 628 | 731 | — | 609 | 638.5 | 435.5 | 1 | 1 | 1 | 1 | 662 | 270 | 696.5 | 483.5 | 671 | 723.5 | 255.5 | 367.5 | 442 | 1.5 | 1 | 1 | 393.5 | 804.5 | 707.5 | 687.5 | 407 | 667 | 474 | 794.5 | 921.5 | 1.5 | 6 | 3 | 466.5 | 813 | 487.5 | 622.5 | 692 | 162 | 331 | 211 |
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 · Independencia
Independencia
Station code: Independencia
Monthly monitoring station data.
PM2.5Lowest 13.6 2016-10Highest 52.5 2019-072015-09 - 2020-05
PM10Lowest 39.8 2018-11Highest 121 2019-072015-09 - 2020-05
O₃Lowest 5.04 2016-06Highest 55.3 2020-022015-09 - 2020-05
NO₂Lowest 8.35 2020-03Highest 85.9 2019-042015-09 - 2020-05
COLowest 1 2015-11Highest 997 2016-082015-09 - 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 | 27.6 | 21.7 | 14.5 | 16.5 | 16.6 | 13.6 | 14 | 16.9 | 19 | 34 | 52.5 | 36.8 | 29.9 | 28.9 | 15.9 | 20.9 | 20.4 | — | 14.8 | 14.5 | 26.9 | 39.3 | 39.5 | 49.3 | 36.6 | 25.2 | 15.8 | 16 | 16 | 16.3 | 19.4 | 16.9 | 22.3 | 26.3 | 45.4 | 41.9 | 34.7 | 21.2 | 15.8 | 22 | 40 | 22.4 | 16.9 | 13.6 | 26.9 | 35.4 | 42.2 | 50.3 | 42.4 | 27 | 24.7 | 14.1 | 17.1 | 16.5 | 15.6 | 17 | 23.7 |
| PM10 | 72.7 | 65.6 | 61.5 | 61 | 60.7 | 55.1 | 54.6 | 55.5 | 56.3 | 91.1 | 121 | 98.2 | 87.9 | 84.8 | 51 | 44.8 | 43.5 | — | 39.8 | 50.3 | 64.7 | 82.3 | 74.7 | 103 | 87.7 | 74.5 | 61.9 | 57.1 | 53.6 | 53.7 | 53.9 | 53.8 | 68.9 | 71.1 | 117 | 89.6 | 76 | 62.8 | 62.9 | 58.5 | 77.7 | 54.8 | 54.7 | 45.1 | 65 | 69.2 | 80.1 | 82 | 64.6 | 55.7 | 57.8 | 51.7 | 50.2 | 49.4 | 40.9 | 40.9 | 50.3 |
| O₃ | 38.1 | 43.6 | 49.4 | 55.3 | 44.6 | 39.1 | 40.5 | 28.4 | 29.7 | 14.2 | 8.87 | 6.47 | 14.1 | 30.3 | 37.5 | 53.2 | 46.3 | — | 33.6 | 28.6 | 27.9 | 21.6 | — | 7.86 | 13.8 | 23.2 | 33.6 | 40.2 | 41.4 | 40.1 | 43.3 | 35.5 | 30.1 | 17.8 | 9.08 | 7.45 | 9.28 | 13 | 19.3 | 23.5 | 35.8 | 25.8 | 26.3 | 21.5 | 25.5 | 11.8 | 6.6 | 5.04 | 6.95 | 12.1 | 22.9 | 30 | 37.2 | 37.1 | 29.2 | 25.4 | 20 |
| NO₂ | 12.9 | 9.38 | 8.35 | 21.6 | 30.5 | 27.9 | 29.1 | 32.6 | 40.6 | 61.9 | 72.4 | 69.3 | 68.1 | 85.9 | — | 39.9 | 33.6 | — | 36.6 | 36.8 | 45.8 | 42.9 | — | — | 71.3 | 69.7 | 55.3 | 41.9 | 37.1 | 37.3 | 31.9 | 34.5 | 63.6 | 58.8 | 73.2 | 64.5 | 66.4 | 59.5 | 48.9 | 37.3 | 41.7 | 27.7 | 28.9 | 37.4 | 57.8 | 41.7 | 45.1 | 54.6 | 69 | 72.2 | 64.1 | 49.8 | 47.6 | 45.8 | 36.7 | 38.5 | 59.4 |
| CO | 894 | 679 | 620 | 744 | 386 | 843 | 611 | 524 | 510 | 746 | 1 | 1 | 1 | 648 | 520 | 580 | 962 | — | 712 | 701 | 1 | 1 | 1 | 1 | 1 | 761 | 538 | 483 | 1 | 428 | 462 | 510 | 734 | 883 | 1 | 1 | 1 | 786 | 638 | 556 | 680 | 531 | 578 | 582 | 842 | 997 | 1 | 9 | 4 | 932 | 733 | 621 | 477 | 508 | 1 | 437 | 2 |
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 · Parque O'Higgins
Parque O'Higgins
Station code: Parque O'Higgins
Monthly monitoring station data.
PM2.5Lowest 12.1 2018-10Highest 55.2 2016-062015-09 - 2020-05
PM10Lowest 41.4 2018-11Highest 115 2019-092015-09 - 2020-05
O₃Lowest 7.63 2016-06Highest 67.6 2017-012015-09 - 2020-05
NO₂Lowest 18.9 2015-11Highest 98.8 2019-062015-09 - 2020-05
SO₂Lowest 17.3 2015-09Highest 17.3 2015-092015-09 - 2020-05
COLowest 1 2016-04Highest 985 2017-112015-09 - 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 | 27.5 | 20.5 | 13.9 | 16.5 | 14.9 | 13.1 | 13.2 | 15.5 | 18.5 | 31.7 | 50.7 | 38.6 | 30 | 30.2 | 19 | 22.2 | 19.4 | — | 13.9 | 12.1 | 25.5 | 38.9 | 39.3 | 47.1 | 35.3 | 22.9 | 17.4 | 16.5 | 15.3 | 14.3 | 14.2 | 15.8 | 22.7 | 27 | 47 | 44.5 | 35.9 | 19.7 | 16.7 | 16.7 | 34 | 20.9 | 15.8 | 14.9 | 27.9 | 35.9 | 44.9 | 55.2 | 41.9 | 22.7 | 24.2 | 15 | 15.5 | 16.3 | 17.5 | 15.2 | 22.2 |
| PM10 | 90.7 | 79.7 | 70.4 | 68.2 | 63 | 57.8 | 60.3 | 51.3 | 115 | 91.1 | 113 | 95.7 | 92.3 | 98 | 57.8 | 54.4 | 56.4 | — | 41.4 | 48.9 | 59.4 | 70.9 | 58.4 | 86.2 | 104 | 88.5 | 92 | 56.2 | 54 | 50.5 | 45.9 | 42.1 | 58.1 | 56.2 | 94.7 | 78.4 | 64.7 | 68.4 | 70.2 | 55.1 | 77.9 | 51.9 | 50.6 | 42.9 | 75.3 | 73.1 | 80 | 85.5 | 72.5 | 65.6 | 91.6 | 57.6 | 53.3 | 54.5 | 46.4 | 41.5 | 48 |
| O₃ | 43.9 | 46.9 | 47.1 | 38.6 | 58.2 | 58.1 | 56 | 48.2 | 40 | 23.7 | 15.7 | 11.3 | 18.4 | 42.3 | 43.4 | 53.4 | 45 | — | 39.6 | 34.3 | 28.3 | 17.1 | 11.3 | 11.1 | 19.4 | 32.7 | 41.7 | 52.1 | 57.3 | — | — | — | 29.6 | 16.2 | 13.9 | — | — | 29.1 | 51.7 | 54.5 | 67.6 | 49.1 | 45.1 | 40 | 38.8 | 24.3 | 10.7 | 7.63 | 12.3 | 21.5 | 45.5 | 50.5 | 20.6 | 47.1 | 26.9 | 28.7 | 37.2 |
| NO₂ | 52.8 | 37.3 | 31.9 | 32 | 28.4 | 36.6 | 25.6 | 31.3 | 40.6 | 75.5 | 90.6 | 98.8 | 85.5 | 66.6 | 51.6 | 37.5 | 36.9 | — | 34.2 | 32.9 | 82.7 | 90.6 | 85.8 | 95.8 | 79.1 | 50.6 | 43.1 | 24.6 | 21.4 | 47.3 | 36 | 28.9 | 43.7 | 49.8 | 73.8 | 71.2 | 58.1 | 48.9 | 34.2 | 27.1 | 34.2 | 28.1 | 29.8 | 32.5 | 50.7 | 53.3 | 62.9 | 67.7 | 51 | 47.4 | 37.7 | 24.5 | 25 | 22.5 | 18.9 | 27.5 | 34.9 |
| SO₂ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 17.3 |
| CO | 894 | 586 | 904 | 720 | 466 | 441 | 424 | 542 | 677 | 1 | 1 | 1 | 1 | 859 | 1 | 676 | 500 | — | 506 | 576 | 870 | 1 | 1 | 1 | 1 | 563 | 2 | 910 | 966 | 914 | 985 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 971 | 859 | 695 | 283 | 756 | 366 | 747 | 846 | 2 | 3 | 2 | 1 | 893 | 354 | 768 | 876 | 323 | 225 | 420 |
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 · Santiago
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Santiago | Argentina | Uruguay | Paraguay | Bolivia | Montenegro |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 50% | 65% | 65% | 46% | 55% | 53% |
| particulate matter PM2.5 (µg/m³) | 31 | — | — | — | — | — |
| Pleasure of spending time in the city | 44% | 64% | 67% | 49% | 40% | 69% |
| particulate matter PM10 (µg/m³) | 66 | — | — | — | — | — |
| Air Pollution | 83% | 42% | 29% | 56% | 64% | 40% |
| Garbage Disposal | 59% | 48% | 34% | 30% | 34% | 42% |
| Availability and quality of drinking water | 71% | 69% | 73% | 57% | 50% | 71% |
| Cleanliness and tidiness | 53% | 43% | 38% | 26% | 32% | 51% |
| Noise and Light pollution | 55% | 53% | 48% | 52% | 59% | 32% |
| Water Pollution | 41% | 55% | 46% | 65% | 66% | 38% |
Air quality in nearby cities
All cities →Chile↗
Rancagua
PM2.513.9
PM1014.6
µg/m³
PM2.5 · FairNO₂ 11.4O₃ 36
September 26, 202622:00
Argentina↗
Mendoza
PM2.53.3
PM103.4
µg/m³
PM2.5 · GoodNO₂ 11.1O₃ 51
September 26, 202622:00
Chile↗
Talca
PM2.54.5
PM105.4
µg/m³
PM2.5 · GoodNO₂ 6.8O₃ 30
September 26, 202622:00
Chile↗
Chillán
PM2.57.3
PM109.2
µg/m³
PM2.5 · FairNO₂ 8.1O₃ 34
September 26, 202622:00
Chile↗
Coquimbo
PM2.58.9
PM1010.3
µg/m³
PM2.5 · FairNO₂ 10.5O₃ 22
September 26, 202622:00
Chile↗
Puente Alto
PM2.530.7
PM1031.3
µg/m³
PM2.5 · ModerateNO₂ 10.7O₃ 119
September 26, 202622:00
Chile↗
Viña del Mar
PM2.55
PM105.5
µg/m³
PM2.5 · GoodNO₂ 9.8O₃ 19
September 26, 202622:00
Chile↗
Talcahuano
PM2.55.4
PM108
µg/m³
PM2.5 · FairNO₂ 4.4O₃ 35
September 26, 202622:00
Chile · air quality in other cities
WEATHER & SURROUNDINGS
Santiago · weather forecast
Daily maximum and minimum temperatures. Forecast point: -33.4569, -70.6483.
Scroll the forecast to see the following days.
Santiago · September 24, 2026: minimum temperature 13.8°C, maximum 18.2°C. Wind: 12 km/h. Humidity: 58%.
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 | 17.6 | 13.8 | 18.2 | 14.5 | 0.2 | 3.3 | 58 | 100 |
| 2026-09-25 | 19.1 | 13.1 | 19.7 | 17.4 | 0.2 | 3 | 55 | 100 |
| 2026-09-26 | 18.7 | 13.7 | 22.3 | 14.7 | 0.1 | 3.6 | 39 | 100 |
| 2026-09-27 | 20.9 | 12.1 | 23.8 | 16.6 | 2.2 | 4.6 | 51 | 94 |
| 2026-09-28 | 18.5 | 12.8 | 18.5 | 12.8 | 4.3 | 4.2 | 64 | 57 |
| 2026-09-29 | 18.3 | 10.8 | 20.4 | 16.3 | 0.1 | 3.3 | 51 | 3 |
| 2026-09-30 | 15.6 | 12.7 | 19.2 | 16.5 | 0.2 | 2.5 | 66 | 100 |
| 2026-10-01 | 23.2 | 15.1 | 24.6 | 19.1 | 0.8 | 3.8 | 34 | 100 |
| 2026-10-02 | 12.1 | 12.1 | 16.3 | 12.7 | 9.7 | 2.9 | 94 | 99 |
| 2026-10-03 | 15.2 | 10.1 | 18 | 14.1 | 0.1 | 4.5 | 52 | 98 |
| 2026-10-04 | 18.6 | 10.6 | 21.9 | 17.9 | 1.7 | 2.8 | 26 | 54 |
| 2026-10-05 | 16.2 | 14.8 | 17.9 | 16.4 | 2.4 | 2.2 | 55 | 100 |
| 2026-10-06 | 18.5 | 15.7 | 22.1 | 17.2 | 0.2 | 3.8 | 48 | 100 |
| 2026-10-07 | 23.3 | 16.1 | 23.9 | 19.9 | 3.2 | 3 | 34 | 100 |
| 2026-10-08 | 21.8 | 15.9 | 24 | 19 | 0.1 | 3.2 | 43 | 100 |
| 2026-10-09 | 17.3 | 15.5 | 20.1 | 16.9 | 1.1 | 2.7 | 84 | 100 |
| 2026-10-10 | 15.8 | 14.2 | 19.7 | 15.7 | 1.5 | 3.7 | 78 | 99 |
UV index by day · Santiago
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.
Santiago · September 26, 2026: UV index: 6.5 .
| 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 | 6.5 | 6.9 | 5.4 | 7.1 | 6.5 | 5.9 | 3.4 | 7.5 | 7.5 | 3.3 | 5.3 | 5.7 | 6 | 5.3 | 6.8 | — |
AIR QUALITY QUESTIONS
Santiago · air pollution - questions and answers
What do the latest air quality data show for Santiago?
Santiago - latest available concentrations (September 26, 2026, 22:00 local time): PM2.5: 15.3 µg/m³, PM10: 16 µg/m³, O₃: 23 µg/m³, NO₂: 23.8 µg/m³, SO₂: 20.3 µg/m³, CO: 413 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Santiago over the past week?
The highest available daily mean PM2.5 was 77.3 µg/m³ (September 24, 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.
What period does the pollution history for Santiago cover?
Available monthly means cover 2015-09 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, SO₂, CO. 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 Santiago 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 Santiago?
For September 26, 2026, the forecast UV index is 6.5. The UV section also shows the following available days.
What wind speed is forecast for Santiago?
For September 24, 2026, forecast wind speed is 12 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.