Air quality
Air quality in Milan today
Updated
Moderate (US AQI 67) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 2:00 am (01:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Milan, Lombardy, Italy, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 67 Moderate
- PM2.5
- 13 µg/m³ 0.9× WHO 24-h guideline
- PM10
- 16 µg/m³
- Ozone
- 29 µg/m³
- Dominant pollutant
- PM2.5 sub-index 67
- Best hour today
- 7:00 am AQI 65
- European AQI
- 36
Air quality in Milan right now
Right now the modelled US Air Quality Index for Milan, Lombardy, Italy is 67, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 67. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 13 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 16 µg/m³ against a guideline of 45; ozone is 29 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 18 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 202 µg/m³.
Milan AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 65 around Mon 7:00 am to 82 around Tue 2:00 am, staying "Moderate" throughout.
The following day is expected to be worse, averaging about 105 against 69 for the next 24 hours.
| Local time (Europe/Rome) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 2:00 am | 67 | Moderate | 13.2 | 16 | 29 |
| Mon 5:00 am | 66 | Moderate | 11.6 | 14 | 15 |
| Mon 8:00 am | 65 | Moderate | 18.1 | 21 | 9 |
| Mon 11:00 am | 65 | Moderate | 24 | 28 | 32 |
| Mon 2:00 pm | 67 | Moderate | 21.2 | 23 | 57 |
| Mon 5:00 pm | 69 | Moderate | 28.7 | 30 | 49 |
| Mon 8:00 pm | 73 | Moderate | 40.2 | 46 | 6 |
| Mon 11:00 pm | 78 | Moderate | 42.7 | 48 | 1 |
| Tue 2:00 am | 82 | Moderate | 37.4 | 46 | 5 |
| Tue 5:00 am | 88 | Moderate | 39.2 | 49 | 8 |
| Tue 8:00 am | 94 | Moderate | 45.7 | 56 | 5 |
| Tue 11:00 am | 101 | Unhealthy for Sensitive Groups | 47.8 | 59 | 30 |
| Tue 2:00 pm | 108 | Unhealthy for Sensitive Groups | 40.1 | 45 | 68 |
| Tue 5:00 pm | 112 | Unhealthy for Sensitive Groups | 42.9 | 48 | 47 |
| Tue 8:00 pm | 117 | Unhealthy for Sensitive Groups | 50.3 | 61 | 1 |
| Tue 11:00 pm | 121 | Unhealthy for Sensitive Groups | 57.8 | 73 | 0 |
| Wed 2:00 am | 127 | Unhealthy for Sensitive Groups | 65 | 70 | 1 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Milan today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 7:00 am (AQI 65, Moderate) and the worst around 9:00 pm (AQI 74). The difference across the day is small, so timing matters little.
Milan vs the rest of Italy
Across 13 Italy cities we track, the average US AQI right now is 45 (Good). Milan at 67 is 22 points worse than average.
It ranks 11 of 13 from cleanest to most polluted; the cleanest is Catania (20) and the most polluted Turin (69).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Milan
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Monza | 14 km | 67 | Moderate | 13.2 |
| Genoa | 119 km | 26 | Good | 6.9 |
| Turin | 125 km | 69 | Moderate | 31.9 |
| Bologna | 201 km | 44 | Good | 8.9 |
| Zürich | 217 km | 26 | Good | 3.4 |
| Mestre | 238 km | 52 | Moderate | 11.2 |
| Venice | 245 km | 52 | Moderate | 11.2 |
| Nice | 248 km | 20 | Good | 3.1 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Milan, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Wildfire smoke
PM2.5 is forecast to reach 44 µg/m³ in the next 24 hours while NASA satellites detected 4 fire hotspots within 300 km in the last day (nearest about 69 km away). Smoke is a likely contributor: keep windows closed, run an air purifier or HVAC filter, and check the fire map before heading out.
Advice for sensitive groups
At 67, most people are fine outdoors. If you are unusually sensitive to PM2.5, keep long or intense workouts to the cleaner hours shown above.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Milan
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.