What is the air quality trend in Spokane?

Over the past 8 days, Spokane had an average AQI of 55 based on station measurements. The worst day was 2026-07-17 with AQI 119.

How is Spokane air quality measured?

Air quality in Spokane 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 Spokane, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

162h

PM2.5 Station

162h · 14 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	96	65–118	33.1 µg/m³	19h	14
2026-07-20	87	64–107	29.0 µg/m³	24h	15
2026-07-19	23	10–58	5.7 µg/m³	24h	16
2026-07-18	54	13–114	15.5 µg/m³	24h	15
2026-07-17	119	22–274	75.2 µg/m³	24h	14
2026-07-16	36	16–90	9.8 µg/m³	20h	15
2026-07-15	14	7–20	3.5 µg/m³	24h	15
2026-07-14	15	10–19	3.5 µg/m³	3h	16

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