Nairobi Seasonal Pollution
Nairobi usually records its highest OpenAQ-derived EPA AQI in September and its cleanest month in November. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Nairobi City, Kenya.
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Average EPA AQI
105
Rank 1 of 3 cities by average AQI
PM2.5
37.0
ug/m3 annualized city average
Seasonality
September
Cleanest: November
Health indicator
1.7
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Nairobi
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111
106
102
106
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Nairobi, the current global analytics build covers 107 daily rows from 2024-03-07 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.