Worst air pollution Mérida, today and tomorrow
Today (16 July): Air quality in Mérida is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 48.6/100).
Tomorrow (17 July 2026): Air quality in Mérida is medium. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 51.8/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Mérida's air quality in Spain benefits from the elevated Extremaduran plateau position at 218 metres on the Guadiana river, with consistent Extremaduran winds across the open Iberian plain providing generally good dispersal. Vehicle traffic on the A-5 national road and surrounding agricultural and tourism operations contribute local sources, while the open Extremaduran Meseta and Atlantic westerlies generally prevent significant pollution accumulation in this UNESCO Roman heritage city throughout the year.
Today - 16 July | Pollution peaks at 15:00
AQI:
Medium
48.6/100
PM2.5 (fine particles):
Good
14.3/100
PM10 (coarse particles):
Good
12.7/100
NO2 (nitrogen dioxide):
Good
6.1/100
O3 (ozone):
Medium
48.6/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.4/100
PM1 (ultrafine particles):
Good
10.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Medium
51.8/100
PM2.5 (fine particles):
Good
14.3/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Good
7.9/100
O3 (ozone):
Medium
51.8/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.8/100
PM1 (ultrafine particles):
Good
9.4/100
Pollen forecast in Mérida
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Mérida
Frequently Asked Questions
Is air quality bad in Mérida right now?
On 16 July 2026, overall air quality in Mérida is medium. AQI is the main air quality indicator at 48.6/100. Pollution peaks around 3:00 PM (O3: 48.6/100).
Will air quality be worse tomorrow in Mérida?
On 17 July 2026, air quality conditions in Mérida will be similar to today, with AQI forecast at medium at 51.8/100. Pollution peaks around 2:00 PM (O3: 51.8/100).
When is air pollution at its worst in Mérida?
How do the seasons affect air quality in Mérida? Winter is generally the most challenging season, since low wind speeds and temperature inversions prevent traffic and wood-smoke pollution from dispersing. Spring generally sees a gradual recovery, driven by more frequent rain showers and stronger breezes that prevent pollutants from settling. Summer brings its own challenge in the form of ground-level ozone, which forms readily under strong sunshine and high temperatures, particularly during heatwaves. By late autumn, air quality is usually back to more moderate levels, though the first cold snaps can bring an early hint of winter's traffic and heating pollution. Away from the moderating effect of the sea, this area experiences starker seasonal air quality swings than coastal Spain.
Are air quality levels in Mérida 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 Spain?
Check air quality in other popular cities:
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