What is the air quality trend in Hikone?

Over the past 8 days, Hikone had an average AQI of 45 based on station measurements. The worst day was 2026-10-16 with AQI 58.

How is Hikone air quality measured?

Air quality in Hikone 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 Hikone, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 18 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	37	31–42	8.9 µg/m³	20.4	7h	32
2026-10-20	43	26–63	10.7 µg/m³	21.5	24h	30
2026-10-19	43	33–65	10.7 µg/m³	14.9	24h	28
2026-10-18	34	25–48	8.2 µg/m³	9.8	24h	33
2026-10-17	45	32–66	11.3 µg/m³	12.5	24h	28
2026-10-16	58	38–107	16.1 µg/m³	14.1	24h	24
2026-10-15	48	30–111	12.7 µg/m³	8.5	24h	26
2026-10-14	53	29–128	14.9 µg/m³	9.0	15h	25

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