Marseille Seasonal Pollution
Marseille usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in May. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Provence-Alpes-Cote d'Azur, France.
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Average EPA AQI
43
Rank 38 of 272 cities by average AQI
PM2.5
9.4
ug/m3 annualized city average
Seasonality
January
Cleanest: May
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Marseille
60
52
38
33
27
37
43
51
44
39
48
50
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Marseille, the current global analytics build covers 332 daily rows from 2023-12-31 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.