Grigny Seasonal Pollution
Grigny usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in February. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Auvergne-Rhone-Alpes, France.
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Average EPA AQI
69
Rank 1 of 272 cities by average AQI
PM2.5
19.9
ug/m3 annualized city average
Seasonality
January
Cleanest: February
Health indicator
0.9
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Grigny
70
67
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What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Grigny, the current global analytics build covers 36 daily rows from 2024-01-02 to 2024-02-07. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.