Wierden Seasonal Pollution
Wierden usually records its highest OpenAQ-derived EPA AQI in May and its cleanest month in July. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Overijssel, Netherlands.
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Average EPA AQI
51
Rank 18 of 71 cities by average AQI
PM2.5
12.4
ug/m3 annualized city average
Seasonality
May
Cleanest: July
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Wierden
49
49
58
47
75
62
35
36
43
44
51
52
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Wierden, the current global analytics build covers 339 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.