Lisbon Seasonal Pollution
Lisbon usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in August. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Lisbon District, Portugal.
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Average EPA AQI
48
Rank 5 of 58 cities by average AQI
PM2.5
11.5
ug/m3 annualized city average
Seasonality
December
Cleanest: August
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Lisbon
47
43
38
-
-
-
-
20
52
41
57
57
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Lisbon, the current global analytics build covers 198 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.