Rijeka Seasonal Pollution
Rijeka usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in April. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Zagreb, Croatia.
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Average EPA AQI
45
Rank 9 of 17 cities by average AQI
PM2.5
10.1
ug/m3 annualized city average
Seasonality
August
Cleanest: April
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Rijeka
44
49
48
34
39
48
56
56
37
40
52
36
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Rijeka, the current global analytics build covers 355 daily rows from 2024-01-01 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.