What is the air quality trend in Hōryūji?

Over the past 3 days, Hōryūji had an average AQI of 56 based on station measurements. The worst day was 2026-10-19 with AQI 61.

How is Hōryūji air quality measured?

Air quality in Hōryūji 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 Hōryūji, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

46h

PM2.5 Station

46h · 70 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	50	31–80	13.7 µg/m³	12h	57
2026-10-20	59	35–96	16.4 µg/m³	24h	53
2026-10-19	61	45–86	16.8 µg/m³	10h	50

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