Mexico City air quality
Mexico · Live AQI and hourly forecast for the next 5 days · updated Sat 18:00 local time
Good
Great air. A perfect time to be outside.
- Next 24 hours
- 38–46US AQI, highest around Sat 18:00
- Best time outside
- Sat 22:00–1:00US AQI about 38
- PM2.5 vs WHO guideline
- 0.5×7.6 µg/m³ over 24 h, guideline 15
- Cigarette equivalent
- ≈ 0.3 a dayBerkeley Earth rule of thumb
- European AQI
- Fairlevel 2 of 6
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Pollutants in Mexico City right now
| Pollutant | Now | Next 24 h vs WHO | US AQI band |
|---|---|---|---|
| Fine particles (PM2.5) | 2.7 µg/m³ | 0.5× | Good |
| Coarse particles (PM10) | 2.9 µg/m³ | 0.2× | Good |
| Nitrogen dioxide (NO2) | 12 µg/m³ | 0.7× | Good |
| Ozone (O3) | 69 µg/m³ | 0.9× | Good |
| Sulphur dioxide (SO2) | 6.0 µg/m³ | 0.3× | Good |
| Carbon monoxide (CO) | 235 µg/m³ | 0.0× | Good |
| Desert dust | 0 µg/m³ | ||
| Smoke and haze (aerosol optical depth) | 0.06 | ||
| UV index | 0.1 |
“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 57 around Mon 17:00, lowest 38 around Sat 22:00.
5-day air quality forecast for Mexico City
Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 150.
| Day | US AQI | At worst | PM2.5 avg | |
|---|---|---|---|---|
| Sat 26 Sept | 38–46 | 7.0 | ||
| Sun 27 Sept | 39–45 | 8.2 | ||
| Mon 28 Sept | 46–67 | 16 | ||
| Tue 29 Sept | 64–68 | 19 | ||
| Wed 30 Sept | 67–70 | 18 |
Common questions about the air in Mexico City
Is the air in Mexico City safe today?
Yes. Right now the US AQI in Mexico City is 46, which counts as good. Great air. A perfect time to be outside.
When is the best time to be outside in Mexico City?
Sat 22:00–1:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 38. The worst hour is around Sat 18:00, at 46.
What is the main pollutant in Mexico City?
Ozone (O3). It drives the index right now, at 69 µg/m³. Formed by sunlight acting on traffic and plant emissions. Highest on hot, still afternoons, often downwind of cities.
How does Mexico City's air compare with the WHO guideline?
Within the guideline. Over the next 24 hours PM2.5 averages about 7.6 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.
How many cigarettes is a day of Mexico City's air?
About 0.3 cigarettes. Over the next 24 hours PM2.5 averages about 7.6 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Mexico City improve this week?
Sunday looks cleanest. Its AQI peaks at 45, against 70 on Wednesday, the worst day in the forecast.
Measured near Mexico City
| Station | PM2.5 µg/m³ | Measured |
|---|---|---|
| Unnamed sensor Sensor.Community, low-cost sensor | 5.5 | Sat 17:48 |
| Unnamed sensor Sensor.Community, low-cost sensor | 529 | Sat 17:48 |
| Unnamed sensor Sensor.Community, low-cost sensor | 0.0 | Sat 17:47 |
Air quality near Mexico City
- Guadalajara 461 km W
- Monterrey 706 km N
- Houston 1,210 km N
- Dallas 1,502 km N
- Phoenix 2,018 km NW
- Miami 2,065 km NE
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 19.43°N, 99.13°W, updated 2026-09-27 00:00 UTC.