Castano Primo Seasonal Pollution
Castano Primo usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in May. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Lombardy, Italy.
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Average EPA AQI
69
Rank 18 of 132 cities by average AQI
PM2.5
29.2
ug/m3 annualized city average
Seasonality
December
Cleanest: May
Health indicator
1.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Castano Primo
38
31
10
20
8
23
41
39
21
62
119
139
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Castano Primo, the current global analytics build covers 175 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.