Jeju air quality now

South Korea · The summary is refreshed every 15 minutes.

November 12

The air is clean now

Measured 06:00

Jeju

11°C

Partly cloudy

41AQI

1026

hPa

Atmospheric
pressure

79%

Humidity

Jeju, November 10, 2026: daily mean PM2.5 8 µg/m³ (8 sensors), level “Low” — as in the Atmy Data Hub. Now (07:00 local time): 7.4 µg/m³. Open methodology and data in JSON: Methodology and data sources · JSON

Right now in Jeju, PM2.5 averages 7.4 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 7 sensors from Government stations, readings from 06:00–06:00 local time (21:00–21:00 UTC), summary prepared at 07:00 local time. Median: 6.0 µg/m³; range across sensors: 4.0–12.0 µg/m³.

In Jeju the air is good 🟢 AQI 41. About the same as three hours ago. ⛅ +11 °C · No precipitation · Wind 3 m/s

In Jeju the air is good right now (approximate, US EPA scale). From 18:00 to 07:00 local time the city mean PM2.5 fell from 12.3 to 7.4 µg/m³.

The weather data do not point to a clear reason for this level.

Weather now: partly cloudy, 11°C, wind 3 m/s, humidity 79%. By 07:00 the wind is expected to pick up to 5 m/s, which may clear the air. By 18:00 the temperature will be about 16°C.

Written automatically at 07:00 local time (22:00 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

3 m/s

Wind, SSE

0 mm

Precipitation today

Jeju: air quality for the completed day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · November 10, 2026 · 00:00–24:00 UTC = 09:00–09:00 UTC+9

8 µg/m³ Low

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 09:00–09:00 UTC+9): 8 µg/m³ from 8 sensors that passed the quality check — the same value as in the Atmy Data Hub.

No. 38 of 39 cities in South Korea and No. 579 of 676 worldwide, from the most polluted.

LowModerateElevatedHighVery highExtremely high

Pollution accumulation index now

30/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now3034
07.0015.0022.0006.00

Pollution accumulation forecast

Today — November 12

18°/11°

Index by time of day

53/100Moderate

  1. 53/100Night
  2. 38/100Morning
  3. 7/100Day
  4. 18/100Evening

Friday — November 13

20°/15°

Index by time of day

47/100Moderate

  1. 47/100Night
  2. 38/100Morning
  3. 9/100Day
  4. 21/100Evening

Saturday — November 14

21°/17°

Index by time of day

48/100Moderate

  1. 48/100Night
  2. 37/100Morning
  3. 6/100Day
  4. 12/100Evening

Sunday — November 15

20°/15°

Index by time of day

47/100Moderate

  1. 47/100Night
  2. 40/100Morning
  3. 10/100Day
  4. 26/100Evening

Monday — November 16

17°/14°

Index by time of day

56/100Moderate

  1. 56/100Night
  2. 40/100Morning
  3. 5/100Day
  4. 15/100Evening

Tuesday — November 17

19°/16°

Index by time of day

41/100Moderate

  1. 41/100Night
  2. 26/100Morning
  3. 8/100Day
  4. 25/100Evening

Forecast of conditions that trap pollution near the surface

Weather

11°

Partly cloudy. Feels like 9°C

  1. MorningPartly cloudy15°C70%
  2. DayPartly cloudy18°C65%
  3. EveningPartly cloudy15°C75%

Wind

3m/sWind from the SSE

2m/sWind gusts

Wind force: 2

Gusts up to 8 m/s are expected.

10-day weather forecast for Jeju

South Korea

  1. TodayNov 12Partly cloudy18°C11°C
  2. FriNov 13Rain20°C15°C
  3. SatNov 14Rain21°C17°C
  4. SunNov 15Rain20°C15°C
  5. MonNov 16Rain17°C14°C
  6. TueNov 17Rain19°C16°C
  7. WedNov 18Rain17°C11°C
  8. ThuNov 19Rain10°C9°C
  9. FriNov 20Rain10°C9°C
  10. SatNov 21Cloudy15°C10°C

Where in Jeju is the air worse?

See all sensors

Highest current reading: 12.0 µg/m³ (한림읍 (한국환경공단 에어코리아 (AirKorea))). Lowest: 4.0 µg/m³ (연동 (한국환경공단 에어코리아 (AirKorea))). The list shows every sensor, highest first.

  1. 한림읍 (한국환경공단 에어코리아 (AirKorea)) →12 µg/m³
  2. 제주항 (한국환경공단 에어코리아 (AirKorea)) →10 µg/m³
  3. 화북동 (한국환경공단 에어코리아 (AirKorea)) →9 µg/m³
  4. 이도동 (한국환경공단 에어코리아 (AirKorea)) →6 µg/m³
  5. 노형로 (한국환경공단 에어코리아 (AirKorea)) →6 µg/m³
  6. 애월읍 (한국환경공단 에어코리아 (AirKorea)) →5 µg/m³
  7. 연동 (한국환경공단 에어코리아 (AirKorea)) →4 µg/m³

Source: atmy.ai monitoring network

Who provides the data

Sensors in the summary by network: Government stations — 7 sensors.

Atmy shows the networks’ readings after the Data Hub’s quality check: test devices and sensors that fail it are left out.

South Korea: sensors in total

529

  1. SeoulSouth Korea

    34

  2. BusanSouth Korea

    30

  3. IncheonSouth Korea

    27

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: Jeju

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

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

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An Atmy card with the air quality in Jeju now: it is refreshed every 15 minutes and links to this page. Paste the code into your site.

Air quality in Jeju now — Atmy

South Korea · City ranking · All pilot cities

Questions

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

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 09:00–09:00 UTC+9): 8 µg/m³ from 8 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 38 of 39 cities in South Korea and No. 579 of 676 worldwide, from the most polluted.

What is the air quality in Jeju right now?

Right now in Jeju, PM2.5 averages 7.4 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 7 sensors from Government stations, readings from 06:00–06:00 local time (21:00–21:00 UTC), summary prepared at 07:00 local time. Median: 6.0 µg/m³; range across sensors: 4.0–12.0 µg/m³.

Is it safe to be outdoors in Jeju now?

The current level is “good” (US EPA scale, approximate). Air quality is satisfactory; no restrictions are recommended. This is the standard guidance of the scale, not medical advice.

Where in Jeju is the air worse?

Highest current reading: 12.0 µg/m³ (한림읍 (한국환경공단 에어코리아 (AirKorea))). Lowest: 4.0 µg/m³ (연동 (한국환경공단 에어코리아 (AirKorea))). The list shows every sensor, highest first.

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