What is the air quality trend in Himimachi?

Over the past 7 days, Himimachi had an average AQI of 50 based on station measurements. The worst day was 2026-07-21 with AQI 59.

How is Himimachi air quality measured?

Air quality in Himimachi 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 Himimachi, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 13 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	59	31–127	16.7 µg/m³	22h	7
2026-07-20	54	37–64	13.8 µg/m³	24h	9
2026-07-19	42	31–58	10.2 µg/m³	24h	10
2026-07-18	45	27–65	11.2 µg/m³	24h	10
2026-07-17	50	31–58	12.3 µg/m³	24h	10
2026-07-16	54	28–75	14.2 µg/m³	24h	9
2026-07-15	50	35–60	12.3 µg/m³	22h	10

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