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Saint-Étienne Seasonal Pollution

Saint-Étienne usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in May. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Auvergne-Rhone-Alpes, France.

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Average EPA AQI

35

Rank 133 of 272 cities by average AQI

PM2.5

8.3

ug/m3 annualized city average

Seasonality

January

Cleanest: May

Health indicator

0.4

cigarette-equivalent per day

Yearly EPA AQI trend

0501002024Saint-Étienne

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec
Saint-Étienne
53
36
25
29
24
27
35
35
24
31
51
49

What this seasonality page measures

Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.

For Saint-Étienne, the current global analytics build covers 339 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.

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