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Nairobi air quality

Kenya · Live AQI and hourly forecast for the next 5 days · updated Sun 03:00 local time

41

Good

US AQI, mostly PM2.5

Great air. A perfect time to be outside.

Next 24 hours
33–41US AQI, highest around Sun 03:00
Best time outside
Sun 12:00–15:00US AQI about 33
PM2.5 vs WHO guideline
0.4×5.9 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 0.3 a dayBerkeley Earth rule of thumb
European AQI
Fairlevel 2 of 6

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The live globe, centred on Nairobi. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Nairobi right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 7.7 µg/m³ 0.4× Good
Coarse particles (PM10) 8.8 µg/m³ 0.1× Good
Nitrogen dioxide (NO2) 6.0 µg/m³ 0.1× Good
Ozone (O3) 39 µg/m³ 0.8× Good
Sulphur dioxide (SO2) 3.4 µg/m³ 0.1× Good
Carbon monoxide (CO) 195 µg/m³ 0.0× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.14
UV index0.0

“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM2.5, 45 for PM10, 25 for NO2, 40 for SO2 and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline.

Next 48 hours

Hourly US AQI. Highest 41 around Sun 03:00, lowest 23 around Mon 12:00.

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Nairobi

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 150.

DayUS AQIAt worstWorst hourPM2.5 avgUV max
Sun 27 Sept 33–43 Good 0:00 6.3 11
Mon 28 Sept 23–35 Good 0:00 4.5 12
Tue 29 Sept 25–36 Good 17:00 5.5 13
Wed 30 Sept 30–51 Moderate 10:00 9.6 13
Thu 1 Oct 50–56 Moderate 16:00 11 13

Common questions about the air in Nairobi

  1. Is the air in Nairobi safe today?

    Yes. Right now the US AQI in Nairobi is 41, which counts as good. Great air. A perfect time to be outside.

  2. When is the best time to be outside in Nairobi?

    Sun 12:00–15:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 33. The worst hour is around Sun 03:00, at 41.

  3. What is the main pollutant in Nairobi?

    Fine particles (PM2.5). It drives the index right now, at 7.7 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

  4. How does Nairobi's air compare with the WHO guideline?

    Within the guideline. Over the next 24 hours PM2.5 averages about 5.9 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.

  5. How many cigarettes is a day of Nairobi's air?

    About 0.3 cigarettes. Over the next 24 hours PM2.5 averages about 5.9 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

  6. Will air quality in Nairobi improve this week?

    Monday looks cleanest. Its AQI peaks at 35, against 56 on Thursday, the worst day in the forecast.

Air quality near Nairobi

All 161 cities

About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (10 km inside Europe), refreshed twice a day. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown; ground stations, where there are any nearby, show what monitors actually measure. The US AQI follows the US EPA scale and the European AQI the EEA bands. Readings for 1.29°S, 36.82°E, updated 2026-09-27 00:00 UTC.