London Seasonal Pollution
London usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in April. The page uses OpenAQ-derived daily history for 8 mapped monitoring locations in England, United Kingdom.
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Average EPA AQI
54
Rank 5 of 171 cities by average AQI
PM2.5
12.0
ug/m3 annualized city average
Seasonality
November
Cleanest: April
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
London
50
48
57
41
62
52
52
55
56
52
67
51
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For London, the current global analytics build covers 366 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.