Aalborg Seasonal Pollution
Aalborg usually records its highest OpenAQ-derived EPA AQI in September and its cleanest month in December. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Nordjylland, Denmark.
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Average EPA AQI
48
Rank 1 of 7 cities by average AQI
PM2.5
12.1
ug/m3 annualized city average
Seasonality
September
Cleanest: December
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Aalborg
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56
53
44
43
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Aalborg, the current global analytics build covers 104 daily rows from 2024-09-19 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.