Ponte de Lima Seasonal Pollution
Ponte de Lima usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in March. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Viana do Castelo, Portugal.
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Average EPA AQI
18
Rank 44 of 58 cities by average AQI
PM2.5
3.5
ug/m3 annualized city average
Seasonality
August
Cleanest: March
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Ponte de Lima
-
13
12
18
12
17
20
25
-
19
24
17
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Ponte de Lima, the current global analytics build covers 186 daily rows from 2024-02-07 to 2024-12-19. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.