Nijmegen Seasonal Pollution
Nijmegen usually records its highest OpenAQ-derived EPA AQI in May and its cleanest month in October. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Gelderland, Netherlands.
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Average EPA AQI
45
Rank 23 of 71 cities by average AQI
PM2.5
9.5
ug/m3 annualized city average
Seasonality
May
Cleanest: October
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Nijmegen
52
43
53
39
54
48
43
49
43
37
46
40
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Nijmegen, the current global analytics build covers 362 daily rows from 2024-01-03 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.