Umeå Seasonal Pollution
Umeå usually records its highest OpenAQ-derived EPA AQI in May and its cleanest month in November. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Västerbotten, Sweden.
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Average EPA AQI
25
Rank 17 of 31 cities by average AQI
PM2.5
5.1
ug/m3 annualized city average
Seasonality
May
Cleanest: November
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Umeå
16
18
31
33
39
32
31
29
23
23
5
9
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Umeå, the current global analytics build covers 274 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.