Santiago do Cacém Seasonal Pollution
Santiago do Cacém usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in May. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Setúbal, Portugal.
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Average EPA AQI
33
Rank 15 of 58 cities by average AQI
PM2.5
7.3
ug/m3 annualized city average
Seasonality
November
Cleanest: May
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Santiago do Cacém
26
29
20
23
14
15
25
30
32
58
67
27
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Santiago do Cacém, the current global analytics build covers 285 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.