Lousã Seasonal Pollution
Lousã usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in October. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Coimbra, Portugal.
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Average EPA AQI
64
Rank 1 of 58 cities by average AQI
PM2.5
18.3
ug/m3 annualized city average
Seasonality
December
Cleanest: October
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Lousã
101
73
56
48
44
56
49
55
74
44
69
102
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Lousã, the current global analytics build covers 358 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.