Stockholm Seasonal Pollution
Stockholm usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in November. The page uses OpenAQ-derived daily history for 27 mapped monitoring locations in Stockholm, Sweden.
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Average EPA AQI
28
Rank 10 of 31 cities by average AQI
PM2.5
5.4
ug/m3 annualized city average
Seasonality
March
Cleanest: November
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Stockholm
22
36
39
30
37
28
25
32
30
23
18
22
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Stockholm, the current global analytics build covers 365 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.