Zagreb Seasonal Pollution
Zagreb usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in September. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Zagreb, Grad, Croatia.
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Average EPA AQI
92
Rank 1 of 17 cities by average AQI
PM2.5
47.4
ug/m3 annualized city average
Seasonality
December
Cleanest: September
Health indicator
2.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Zagreb
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10
12
94
124
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Zagreb, the current global analytics build covers 70 daily rows from 2024-09-27 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.