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 1 mapped monitoring location in Zagreb, Croatia.
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Average EPA AQI
77
Rank 4 of 17 cities by average AQI
PM2.5
24.6
ug/m3 annualized city average
Seasonality
December
Cleanest: September
Health indicator
1.1
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Zagreb
-
-
70
57
60
62
64
63
56
85
122
125
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 285 daily rows from 2024-03-14 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.