What is the air quality trend in Missoula?

Over the past 14 days, Missoula had an average AQI of 123 based on station measurements. The worst day was 2026-08-07 with AQI 161.

How is Missoula air quality measured?

Air quality in Missoula 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 Missoula, United States

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

332h

PM2.5 Station

332h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-07	161	154–172	75.6 µg/m³	23h	1
2026-08-06	137	112–167	52.3 µg/m³	24h	1
2026-08-05	99	94–109	34.9 µg/m³	24h	1
2026-08-04	121	99–132	43.5 µg/m³	24h	1
2026-08-03	157	53–194	86.5 µg/m³	23h	1
2026-08-02	99	62–124	34.1 µg/m³	24h	1
2026-08-01	123	100–155	45.1 µg/m³	24h	1
2026-07-31	100	83–127	34.8 µg/m³	24h	1
2026-07-30	120	112–151	43.1 µg/m³	24h	1
2026-07-29	118	103–152	42.5 µg/m³	24h	1
2026-07-28	123	114–156	44.8 µg/m³	24h	1
2026-07-27	142	123–163	56.4 µg/m³	24h	1
2026-07-26	130	94–157	48.3 µg/m³	24h	1
2026-07-25	92	78–96	31.4 µg/m³	22h	1

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