Aosta Seasonal Pollution
Aosta usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in May. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Valle d’Aosta, Italy.
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Average EPA AQI
42
Rank 67 of 132 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
Aosta
67
51
31
30
25
37
41
52
28
44
58
65
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Aosta, the current global analytics build covers 302 daily rows from 2024-01-29 to 2024-12-30. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.