What is the air quality trend in Honolulu?

Over the past 8 days, Honolulu had an average AQI of 55 based on station measurements. The worst day was 2026-07-17 with AQI 102.

How is Honolulu air quality measured?

Air quality in Honolulu 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 Honolulu, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Honolulu, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

149h

PM2.5 Station

149h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	31	12–60	7.6 µg/m³	17h	2
2026-07-20	55	18–120	15.7 µg/m³	21h	2
2026-07-19	64	23–193	24.7 µg/m³	21h	2
2026-07-18	73	15–186	27.0 µg/m³	21h	2
2026-07-17	102	13–232	51.7 µg/m³	21h	2
2026-07-16	37	2–96	9.5 µg/m³	24h	2
2026-07-15	53	24–286	21.0 µg/m³	21h	2
2026-07-14	26	6–42	6.2 µg/m³	3h	1

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