Worst air pollution Missoula, today and tomorrow
Today (16 July): Air quality in Missoula is fair. PM2.5 and PM1 are fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 12:00 AM (NO2: 53.7/100).
Tomorrow (17 July 2026): Air quality in Missoula is fair. PM2.5 decreases to good; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 54.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Missoula's air quality reflects the Clark Fork river valley's severe topographic enclosure between the Bitterroot, Rattlesnake, and Sapphire mountain ranges, with residential wood burning generating some of Montana's highest winter PM2.5 concentrations under persistent cold-air pool inversions. Vehicle emissions from I-90 contribute year-round, while summer wildfire smoke from surrounding Montana and Idaho forests has become an increasingly severe and prolonged seasonal challenge.
Today - 16 July | Pollution peaks at 00:00
AQI:
Medium
53.7/100
PM2.5 (fine particles):
Fair
26.7/100
PM10 (coarse particles):
Good
10.0/100
NO2 (nitrogen dioxide):
Medium
53.7/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
10.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Fair
28.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 22:00
AQI:
Medium
54.0/100
PM2.5 (fine particles):
Good
18.2/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Medium
54.0/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
6.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Fair
21.6/100
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Frequently Asked Questions
Is air quality bad in Missoula right now?
On 16 July 2026, overall air quality in Missoula is fair. PM1 is the main pollutant at 28.4/100. Pollution peaks around 12:00 AM (NO2: 53.7/100).
Will air quality be worse tomorrow in Missoula?
On 17 July 2026, air quality conditions in Missoula will be similar to today, with O3 forecast at fair at 34.1/100. Pollution peaks around 10:00 PM (NO2: 54.0/100).
When is air pollution at its worst in Missoula?
Air quality in Missoula shifts across the year. In short, spring and autumn generally bring the cleanest, most stable air, whereas winter temperature inversions can trap cold air and pollution in valleys and basins for days at a time. Higher-elevation, more exposed locations generally avoid the worst of the valley inversion episodes.
Are air quality levels in Missoula based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app