What is the air quality trend in Jeju City?

Over the past 8 days, Jeju City had an average AQI of 33 based on station measurements. The worst day was 2026-09-02 with AQI 43.

How is Jeju City air quality measured?

Air quality in Jeju City is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Jeju City, South Korea

Name: Jeju City Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Jeju City, South Korea.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 10 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	37	29–62	9.0 µg/m³	17h	12
2026-09-04	33	21–39	7.8 µg/m³	24h	12
2026-09-03	41	25–65	10.1 µg/m³	24h	14
2026-09-02	43	25–62	10.5 µg/m³	24h	12
2026-09-01	31	15–59	7.5 µg/m³	24h	12
2026-08-31	25	18–50	5.9 µg/m³	24h	13
2026-08-30	31	15–47	7.5 µg/m³	24h	15
2026-08-29	25	22–29	6.1 µg/m³	4h	14

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