Athens Seasonal Pollution
Athens usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in July. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Attikí, Greece.
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Average EPA AQI
67
Rank 2 of 22 cities by average AQI
PM2.5
17.8
ug/m3 annualized city average
Seasonality
November
Cleanest: July
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Athens
74
74
71
64
62
65
60
61
63
64
78
65
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Athens, the current global analytics build covers 293 daily rows from 2024-01-01 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.