Is the air quality good in Milan?
As of October 17, 2026, at 6:00 AM CET (GMT+1), air quality in Milan, Italy, is poor, with AQI above 170, classified as “unhealthy,” with PM2.5 as the dominant pollutant, posing serious health risks to residents, especially children and the elderly.
Milan’s average PM2.5 concentration in 2025 was 17 µg/m³, corresponding to an AQI of 61, classified as “moderate” and 3.4 times the WHO annual guideline of 5 µg/m³. Today’s PM2.5 of 92 µg/m³ is more than five times that annual average, reflecting a severe autumn smog episode.
For real-time conditions, see Milan’s air quality map.
Milan, Italy ranked among the most polluted major cities globally, as of 6:00 AM (local time) on October 17, 2026. Source: IQAir.
Air quality map of Milan, Italy as of 6:00 AM (local time) on October 17, 2026. Source: IQAir.
When will the air quality improve in Milan?
The hourly forecast shows AQI declining steadily to moderate range by early evening as southerly winds strengthen and humidity drops, improving atmospheric dispersion through the afternoon.
However, air pollution in the Po Valley exhibits distinct seasonal patterns, with winter months seeing increased pollution due to temperature inversions and higher energy demand for heating, and conditions are likely to deteriorate again as autumn deepens toward winter (1).
Lasting improvement requires continued enforcement of emission controls across industry, traffic, and agriculture in the Po Valley.
Hourly air quality forecast for Milan, Italy as of 6:00 AM (local time) on October 17, 2026. Source: IQAir.
What is causing poor air quality in Milan?
Milan sits in the Po Valley, a low-lying basin surrounded by the Alps and Apennines that naturally traps pollutants, and stagnant weather, weak winds, and cooler nights have created a temperature inversion that prevents fresh air from dispersing pollutants (2).
The Po Valley is home to some of Italy’s most industrialized areas, where factories release PM2.5 and nitrogen oxides, while livestock farming may be responsible for as much as a quarter of Lombardy’s air pollution, and smoke from residential wood burning further impacts winter air quality (3).
Vehicle emissions, particularly from Milan’s dense urban traffic, add additional nitrogen dioxide and PM2.5 year-round, with today’s very low wind speed of 3 km/h and high humidity at 90% creating near-ideal conditions for pollutant accumulation near the surface.
How can I protect myself from poor air quality?
- Get a free air quality app for real-time air quality alerts and forecasts.
- Shut doors and windows and set the HVAC to recirculate mode.
- Contribute to your community’s outdoor air quality data.
- Stay indoors when air quality is poor; if you do need to go outdoors, wear a KN95/FFP2 mask.
- Run a high-performance air purifier to filter particles, gases, and other pollutants.
