Lyon Seasonal Pollution
Lyon 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 Auvergne-Rhone-Alpes, France.
Search city analytics
Average EPA AQI
40
Rank 63 of 272 cities by average AQI
PM2.5
9.9
ug/m3 annualized city average
Seasonality
January
Cleanest: September
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Lyon
66
41
32
29
28
28
36
34
27
34
58
61
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Lyon, the current global analytics build covers 334 daily rows from 2024-01-02 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.