Worst air pollution Key West, today and tomorrow
Today (16 July): Air quality in Key West is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 63.1/100).
Tomorrow (17 July 2026): Air quality in Key West is fair. AQI improves to fair; PM2.5 increases to fair; PM10 decreases to fair; all other pollutants stay as today. Pollution peaks around 6:00 AM (PM10: 37.7/100). 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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Key West experiences air quality conditions shaped chiefly by tropical maritime air, and Saharan dust plumes crossing the Atlantic occasionally raise summer haze. Most days bring generally favorable conditions here, with occasional exceptions tied to shifting weather patterns. Checking current readings is still the best way to plan outdoor activity around Key West.
Today - 16 July | Pollution peaks at 00:00
AQI:
Poor
63.1/100
PM2.5 (fine particles):
Medium
57.3/100
PM10 (coarse particles):
Poor
63.1/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
25.8/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
12.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 06:00
AQI:
Fair
37.7/100
PM2.5 (fine particles):
Fair
30.3/100
PM10 (coarse particles):
Fair
37.7/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
22.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
4.0/100
Pollen forecast in Key West
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Key West
Frequently Asked Questions
Is air quality bad in Key West right now?
On 16 July 2026, overall air quality in Key West is poor. AQI is the main air quality indicator at 63.1/100. Pollution peaks around 12:00 AM (PM10: 63.1/100).
Will air quality be worse tomorrow in Key West?
On 17 July 2026, air quality conditions in Key West will be better than today, with AQI forecast at fair at 37.7/100. Pollution peaks around 6:00 AM (PM10: 37.7/100).
When is air pollution at its worst in Key West?
Key West follows a fairly predictable seasonal air quality pattern: daily summer storms tend to scrub the air clean before pollution can build up, but the drier months from roughly November through April bring the highest risk of wildfire and prescribed-burn smoke. Inland areas tend to see more smoke buildup than locations closer to the coast.
Are air quality levels in Key West 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.
Want to see air quality forecasts for other cities in United States?
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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