Milan Seasonal Pollution
Milan usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in September. The page uses OpenAQ-derived daily history for 7 mapped monitoring locations in Lombardy, Italy.
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Average EPA AQI
70
Rank 14 of 132 cities by average AQI
PM2.5
21.3
ug/m3 annualized city average
Seasonality
January
Cleanest: September
Health indicator
1.0
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Milan
134
106
54
46
39
47
53
53
35
64
112
132
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Milan, the current global analytics build covers 300 daily rows from 2024-01-29 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.