Nairobi air quality now

Kenya · The summary is refreshed every 15 minutes.

Now

No current value: fewer than four sensors at different places are reporting now.

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Nairobi, November 10, 2026: daily mean PM2.5 22 µg/m³ (51 sensors), level “Moderate” — as in the Atmy Data Hub. Open methodology and data in JSON: Methodology and data sources · JSON

There are not enough fresh measurements for Nairobi right now. From 12:00 to 21:00 local time the city mean PM2.5 rose from 17.8 to 28.0 µg/m³.

Light wind (2 m/s) in the evening or at night, as the air cools, possibly traps particles near the ground (a temperature inversion). High humidity (95%) possibly makes optical sensors read somewhat higher.

Weather now: rain, 17°C, wind 2 m/s, humidity 95%. Precipitation is expected around 01:00; it may wash particles out. By 12:00 the temperature will be about 25°C.

Written automatically at 00:12 local time (21:12 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

2 m/s

Wind, NW

2.9 mm

Precipitation today

Nairobi: air quality for the completed day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · November 10, 2026 · 00:00–24:00 UTC = 03:00–03:00 UTC+3

22 µg/m³ Moderate

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 03:00–03:00 UTC+3): 22 µg/m³ from 51 sensors that passed the quality check — the same value as in the Atmy Data Hub.

No. 2 of 2 cities in Kenya and No. 286 of 676 worldwide, from the most polluted.

LowModerateElevatedHighVery highExtremely high

Air Quality in Kenya for the Completed Day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · November 10, 2026 · 00:00–24:00 UTC

Kisumu →22 µg/m³Nairobi →22 µg/m³
LowModerateElevatedHighVery highExtremely high

Source: Air monitoring system atmy.ai

Pollution accumulation index now

49/100Moderate · An estimate of weather conditions · not a PM2.5 forecast

Now4946
01.0009.0016.0000.00

Pollution accumulation forecast

Today — November 12

25°/16°

Index by time of day

54/100Moderate

  1. 54/100Night
  2. 41/100Morning
  3. 10/100Day
  4. 24/100Evening

Friday — November 13

25°/15°

Index by time of day

57/100Moderate

  1. 57/100Night
  2. 43/100Morning
  3. 9/100Day
  4. 24/100Evening

Saturday — November 14

23°/16°

Index by time of day

59/100Moderate

  1. 59/100Night
  2. 41/100Morning
  3. 8/100Day
  4. 24/100Evening

Sunday — November 15

24°/16°

Index by time of day

52/100Moderate

  1. 52/100Night
  2. 41/100Morning
  3. 7/100Day
  4. 23/100Evening

Monday — November 16

22°/16°

Index by time of day

48/100Moderate

  1. 48/100Night
  2. 37/100Morning
  3. 6/100Day
  4. 22/100Evening

Tuesday — November 17

22°/16°

Index by time of day

47/100Moderate

  1. 47/100Night
  2. 34/100Morning
  3. 5/100Day
  4. 22/100Evening

Forecast of conditions that trap pollution near the surface

Weather

17°

Rain. Feels like 18°C

  1. MorningCloudy20°C74%
  2. DayRain22°C70%
  3. EveningRain17°C97%

Wind

2m/sWind from the NW

4m/sWind gusts

Wind force: 2

Gusts up to 4 m/s are expected.

10-day weather forecast for Nairobi

Kenya

  1. TodayNov 12Rain25°C16°C
  2. FriNov 13Rain25°C15°C
  3. SatNov 14Rain23°C16°C
  4. SunNov 15Rain24°C16°C
  5. MonNov 16Rain22°C16°C
  6. TueNov 17Rain22°C16°C
  7. WedNov 18Rain23°C16°C
  8. ThuNov 19Rain24°C16°C
  9. FriNov 20Rain24°C16°C
  10. SatNov 21Rain23°C16°C

Kenya: sensors in total

1

  1. KikuyuKenya

    1

Cities with the most sensors

All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.

Air quality calendar: Nairobi

Daily mean PM2.5 of the city sensors, µg/m³

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

Kenya · City ranking · All pilot cities

Questions

What was the air quality in Nairobi over the last completed day?

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 03:00–03:00 UTC+3): 22 µg/m³ from 51 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 2 of 2 cities in Kenya and No. 286 of 676 worldwide, from the most polluted.

What is the air quality in Nairobi right now?

Fresh data for Nairobi are insufficient (last update: 17:15 local time, 14:15 UTC). Open the map for the latest readings of individual sensors.

Where do these data come from?

From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.

How often is this page updated?

The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.

Data

Where do these data come from?

The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.

“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.

Source: public Atmy monitoring data. Methodology and data sources · Data terms