Perafita Seasonal Pollution
Perafita usually records its highest OpenAQ-derived EPA AQI in February and its cleanest month in September. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Porto, Portugal.
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Average EPA AQI
23
Rank 24 of 58 cities by average AQI
PM2.5
n/a
ug/m3 annualized city average
Seasonality
February
Cleanest: September
Health indicator
n/a
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Perafita
26
36
27
27
19
20
18
19
16
19
30
24
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Perafita, the current global analytics build covers 241 daily rows from 2024-01-01 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.