Copenhagen Seasonal Pollution
Copenhagen usually records its highest OpenAQ-derived EPA AQI in September and its cleanest month in December. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Hovedstaden, Denmark.
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Average EPA AQI
28
Rank 5 of 7 cities by average AQI
PM2.5
7.2
ug/m3 annualized city average
Seasonality
September
Cleanest: December
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Copenhagen
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35
33
24
23
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Copenhagen, the current global analytics build covers 117 daily rows from 2024-09-06 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.