Zurich Seasonal Pollution
Zurich usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in May. The page uses OpenAQ-derived daily history for 7 mapped monitoring locations in Zurich, Switzerland.
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Average EPA AQI
47
Rank 10 of 33 cities by average AQI
PM2.5
11.5
ug/m3 annualized city average
Seasonality
November
Cleanest: May
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Zurich
53
46
43
42
31
49
37
54
36
51
60
59
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Zurich, 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.