Strasbourg Seasonal Pollution
Strasbourg usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in September. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Grand Est, France.
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Average EPA AQI
37
Rank 115 of 272 cities by average AQI
PM2.5
8.8
ug/m3 annualized city average
Seasonality
December
Cleanest: September
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Strasbourg
26
42
51
31
29
28
35
33
25
40
50
51
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Strasbourg, the current global analytics build covers 341 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.