Wejherowo Seasonal Pollution
Wejherowo usually records its highest OpenAQ-derived EPA AQI in September and its cleanest month in September. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Pomorskie, Poland.
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Average EPA AQI
84
Rank 2 of 155 cities by average AQI
PM2.5
27.1
ug/m3 annualized city average
Seasonality
September
Cleanest: September
Health indicator
1.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Wejherowo
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What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Wejherowo, the current global analytics build covers 23 daily rows from 2024-09-03 to 2024-09-25. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.