Johannesburg air quality now

South Africa · The summary is refreshed every 15 minutes.

Now

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

Open map

Johannesburg, November 10, 2026: daily mean PM2.5 25 µg/m³ (5 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 Johannesburg right now. From 11:00 to 21:00 local time the city mean PM2.5 rose from 12.0 to 25.0 µg/m³. The highest hour was 18:00 with 34.4 µg/m³.

Light wind (1 m/s) in the evening or at night, as the air cools, possibly traps particles near the ground (a temperature inversion).

Weather now: clear, 22°C, wind 1 m/s, humidity 40%. No major change in the wind is expected in the coming hours. By 11:00 the temperature will be about 30°C.

Written automatically at 23:07 local time (21:07 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

1 m/s

Wind, E

0.3 mm

Precipitation today

Johannesburg: air quality for the completed day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · November 10, 2026 · 00:00–24:00 UTC = 02:00–02:00 UTC+2

25 µg/m³ Moderate

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 02:00–02:00 UTC+2): 25 µg/m³ from 5 sensors that passed the quality check — the same value as in the Atmy Data Hub.

No. 1 of 4 cities in South Africa and No. 237 of 676 worldwide, from the most polluted.

LowModerateElevatedHighVery highExtremely high

Pollution accumulation index now

45/100Moderate · An estimate of weather conditions · not a PM2.5 forecast

Now4522
00.0008.0015.0023.00

Pollution accumulation forecast

Today — November 12

31°/19°

Index by time of day

56/100Moderate

  1. 56/100Night
  2. 36/100Morning
  3. 7/100Day
  4. 22/100Evening

Friday — November 13

32°/17°

Index by time of day

47/100Moderate

  1. 47/100Night
  2. 36/100Morning
  3. 6/100Day
  4. 23/100Evening

Saturday — November 14

28°/17°

Index by time of day

48/100Moderate

  1. 48/100Night
  2. 35/100Morning
  3. 8/100Day
  4. 21/100Evening

Sunday — November 15

25°/16°

Index by time of day

43/100Moderate

  1. 43/100Night
  2. 30/100Morning
  3. 5/100Day
  4. 22/100Evening

Monday — November 16

28°/15°

Index by time of day

49/100Moderate

  1. 49/100Night
  2. 35/100Morning
  3. 7/100Day
  4. 23/100Evening

Tuesday — November 17

26°/14°

Index by time of day

55/100Moderate

  1. 55/100Night
  2. 39/100Morning
  3. 7/100Day
  4. 23/100Evening

Forecast of conditions that trap pollution near the surface

Weather

22°

Clear. Feels like 21°C

  1. MorningClear26°C33%
  2. DayCloudy31°C20%
  3. EveningPartly cloudy25°C38%

Wind

1m/sWind from the E

2m/sWind gusts

Wind force: 1

Light wind is expected over the next few hours.

10-day weather forecast for Johannesburg

South Africa

  1. TodayNov 12Cloudy31°C19°C
  2. FriNov 13Partly cloudy32°C17°C
  3. SatNov 14Rain28°C17°C
  4. SunNov 15Rain25°C16°C
  5. MonNov 16Thunderstorm28°C15°C
  6. TueNov 17Thunderstorm26°C14°C
  7. WedNov 18Cloudy25°C17°C
  8. ThuNov 19Partly cloudy27°C16°C
  9. FriNov 20Cloudy29°C17°C

South Africa: sensors in total

33

  1. Cape TownSouth Africa

    5

  2. KwaDukuzaSouth Africa

    4

  3. Richards BaySouth Africa

    4

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: Johannesburg

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

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

South Africa · City ranking · All pilot cities

Questions

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

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 02:00–02:00 UTC+2): 25 µg/m³ from 5 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 1 of 4 cities in South Africa and No. 237 of 676 worldwide, from the most polluted.

What is the air quality in Johannesburg right now?

Fresh data for Johannesburg are insufficient (last update: 16:15 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