What is the air quality trend in Shimonoseki?

Over the past 15 days, Shimonoseki had an average AQI of 40 based on station measurements. The worst day was 2026-08-06 with AQI 55.

How is Shimonoseki air quality measured?

Air quality in Shimonoseki 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 Shimonoseki, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Shimonoseki, Japan.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

330h

PM2.5 Station

330h · 18 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	32	29–35	7.7 µg/m³	3h	15
2026-08-07	29	19–52	7.0 µg/m³	21h	14
2026-08-06	55	23–113	14.6 µg/m³	24h	6
2026-08-05	32	10–53	7.7 µg/m³	24h	7
2026-08-04	41	24–59	9.9 µg/m³	24h	11
2026-08-03	39	20–58	9.5 µg/m³	24h	10
2026-08-02	47	21–62	11.6 µg/m³	24h	12
2026-08-01	54	41–80	14.1 µg/m³	24h	13
2026-07-31	49	39–58	12.0 µg/m³	24h	11
2026-07-30	46	35–59	11.1 µg/m³	24h	12
2026-07-29	37	24–52	8.9 µg/m³	24h	12
2026-07-28	36	24–56	8.6 µg/m³	24h	12
2026-07-27	36	28–45	8.7 µg/m³	24h	14
2026-07-26	36	26–49	8.7 µg/m³	24h	12
2026-07-25	40	22–61	9.8 µg/m³	18h	12

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