Opfikon Seasonal Pollution
Opfikon usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in September. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Zurich, Switzerland.
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Average EPA AQI
51
Rank 5 of 33 cities by average AQI
PM2.5
13.2
ug/m3 annualized city average
Seasonality
November
Cleanest: September
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Opfikon
66
57
49
41
39
50
46
56
33
36
86
57
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Opfikon, the current global analytics build covers 364 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.