Wels Seasonal Pollution
Wels usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in September. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Oberösterreich, Austria.
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Average EPA AQI
44
Rank 21 of 68 cities by average AQI
PM2.5
10.2
ug/m3 annualized city average
Seasonality
January
Cleanest: September
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Wels
58
46
55
34
30
37
34
35
27
53
58
52
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Wels, the current global analytics build covers 300 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.