Air Quality in Rancagua Today — Live AQI, PM2.5 & PM10, Smog, Weather and Forecast

3 weather warnings in effect for Chile 🌧️ Heavy rain⛈️ Thunderstorms💨 Strong wind

Latest air quality data: Rancagua

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Pollution and air quality forecast for Rancagua. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Rancagua:

particulate matter (PM2.5) dust - 34 (Moderate)
particulate matter (PM10) suspended dust - 35 (Moderate)
ozone (O3) - 71 (Moderate)
nitrogen dioxide (NO2) - 33 (Good)
sulfur dioxide (SO2) - 24 (Good)
carbon monoxide (CO) - 332 (Good)

Real-time Air Quality Index (AQI) for Rancagua, Wednesday, August 26, 2026: 2.

AQI 2 Moderate

What is the air quality in Rancagua today? Is the air polluted in Rancagua?. Is there smog?

Today (Wednesday, August 26, 2026) air quality is moderate in Rancagua. Some pollutants in Rancagua may slightly affect very few hypersensitive individuals. Air pollutants in Rancagua may cause minor breathing discomfort to sensitive people.

What is the current level of PM2.5 in Rancagua? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 34 (Moderate) For comparison, the highest level of PM2.5 in Rancagua in the last 7 days was: 54 (Monday, August 24, 2026) and the lowest: 20 (Saturday, August 22, 2026).

What is the level of PM10 today in Rancagua? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Rancagua is: 35 (Moderate)

How is the O3 level today in Rancagua? (ozone (O3))
71 (Moderate)

How high is the level of NO2? (nitrogen dioxide (NO2))
33 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
24 (Good)

How high is the CO level? (carbon monoxide (CO))
332 (Good)

Current data Wednesday, August 26, 2026 at 9:00 PM

PM2,5 34 (Moderate)

PM10 35 (Moderate)

O3 71 (Moderate)

NO2 33 (Good)

SO2 24 (Good)

CO 332 (Good)

Data on air pollution from recent days in Rancagua

index	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20	2026-08-19
pm25	45 Unhealthy for Sensitive Groups	33 Moderate	54 Unhealthy for Sensitive Groups	23 Moderate	20 Moderate	22 Moderate	31 Moderate	31 Moderate
pm10	46 Moderate	34 Moderate	55 Unhealthy for Sensitive Groups	24 Moderate	20 Moderate	23 Moderate	31 Moderate	32 Moderate
o3	48 Good	48 Good	66 Good	71 Moderate	36 Good	39 Good	51 Good	81 Moderate
no2	42 Moderate	24 Good	29 Good	15 Good	20 Good	23 Good	21 Good	20 Good
so2	32 Good	14 Good	21 Good	8 Good	4 Good	3 Good	6 Good	16 Good
co	522 Good	399 Good	570 Good	402 Good	428 Good	632 Good	859 Good	611 Good

data source »

Quality of life in Rancagua

Green and Parks in the City

Rancagua 13%

Argentina: 65% Uruguay: 65% Paraguay: 46% Bolivia: 55% Montenegro: 53%

particulate matter PM2.5

Rancagua 28 (Moderate)

Pleasure of spending time in the city

Rancagua 19%

Argentina: 64% Uruguay: 67% Paraguay: 49% Bolivia: 40% Montenegro: 69%

particulate matter PM10

Rancagua 68 (Unhealthy for Sensitive Groups)

Air Pollution

Rancagua 92%

Argentina: 42% Uruguay: 29% Paraguay: 56% Bolivia: 64% Montenegro: 40%

Garbage Disposal

Rancagua 0%

Argentina: 48% Uruguay: 34% Paraguay: 30% Bolivia: 34% Montenegro: 42%

Availability and quality of drinking water

Rancagua 38%

Argentina: 69% Uruguay: 73% Paraguay: 57% Montenegro: 71%

Cleanliness and tidiness

Rancagua 25%

Argentina: 43% Uruguay: 38% Paraguay: 26% Bolivia: 32% Montenegro: 51%

Noise and Light pollution

Rancagua 63%

Argentina: 53% Uruguay: 48% Paraguay: 52% Bolivia: 59% Montenegro: 32%

Water Pollution

Rancagua 50%

Argentina: 55% Uruguay: 46% Paraguay: 65% Bolivia: 66% Montenegro: 38%

Source: Numbeo

Rancagua

Wednesday, August 26, 2026 at 9:00 PM

PM2,5 34 (Moderate)

particulate matter (PM2.5) dust

PM10 35 (Moderate)

particulate matter (PM10) suspended dust

O3 71 (Moderate)

ozone (O3)

NO2 33 (Good)

nitrogen dioxide (NO2)

SO2 24 (Good)

sulfur dioxide (SO2)

CO 332 (Good)

carbon monoxide (CO)

Rancagua

index	2026-08-19	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26
pm25	31	31	22	20	23	54	33	45
pm10	32	31	23	20	24	55	34	46
o3	81	51	39	36	71	66	48	48
no2	20	21	23	20	15	29	24	42
so2	16	5.9	3	4	7.9	21	14	32
co	611	859	632	428	402	570	399	522

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Chile

16-day weather forecast for Chile: today around 24°C (cloudy), lows near 13°C. Daily temperature and conditions, updated every day. A moderate breeze (about 15 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — Chile

The UV index in Chile today is 5.2 (moderate) — unprotected fair skin can burn in about 40 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Rancagua — compare nearby locations.

Santiago 49 µg/m³
Talca 8 µg/m³
MendozaArgentina 4 µg/m³
Chillán 9 µg/m³
Talcahuano 12 µg/m³
Puente Alto 26 µg/m³
Antofagasta 10 µg/m³
Viña del Mar 30 µg/m³

Frequently asked questions

Is the air safe to breathe in Rancagua today?

The current average PM2.5 across Rancagua is about 34 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Rancagua?

Right now PM2.5 in Rancagua averages about 34 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Rancagua?

Over the past week, the highest daily PM2.5 in Rancagua was recorded on Monday, August 24 (about 54 µg/m³).

What is the UV index in Rancagua today?

The UV index in Rancagua today is 5.2 (moderate) — unprotected fair skin can burn in about 40 minutes.

Does today's wind help disperse smog in Rancagua?

A moderate breeze (about 15 km/h) is partially dispersing pollutants today.

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.