Coimbra Seasonal Pollution
Coimbra usually records its highest OpenAQ-derived EPA AQI in February and its cleanest month in March. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Coimbra, Portugal.
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Average EPA AQI
19
Rank 39 of 58 cities by average AQI
PM2.5
n/a
ug/m3 annualized city average
Seasonality
February
Cleanest: March
Health indicator
n/a
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Coimbra
18
22
14
-
-
-
-
15
-
21
-
-
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Coimbra, the current global analytics build covers 84 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.