What is the air quality in Nairobi?

Nairobi, Kenya has an annual US AQI of 67 (Polluted) and average PM2.5 of 17.9 µg/m³, ranking #2979 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Nairobi?

December is typically the cleanest month (AQI 58) and July the most polluted (AQI 82).

Where does Nairobi's air quality data come from?

PM2.5: 1998–2025 (monitors 2021–2023, 2025, satellite 1998–2021, 2023–2024; 2025 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Nairobi, Kenya — Air Quality & Clean City Guide 2026

Nairobi Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2979	Nairobi, Kenya	Africa & Middle East	AQI 67	PM2.5 17.9 µg/m³