Barcelona Seasonal Pollution
Barcelona usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in September. The page uses OpenAQ-derived daily history for 9 mapped monitoring locations in Catalonia, Spain.
Search city analytics
Average EPA AQI
47
Rank 32 of 253 cities by average AQI
PM2.5
10.7
ug/m3 annualized city average
Seasonality
November
Cleanest: September
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Barcelona
58
53
36
45
41
42
42
53
33
46
59
53
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Barcelona, the current global analytics build covers 348 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.