Worst air pollution Lecco, today and tomorrow
Today (20 September): Air quality in Lecco is fair. AQI, PM2.5, PM10, NO2, O3, and PM1 are fair; SO2, CO, and HCHO are good. Pollution peaks around 9:00 PM (NO2: 34.1/100).
Tomorrow (21 September 2026): Air quality in Lecco is moderate. AQI worsens to moderate; NO2 increases to moderate; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 9:00 PM (NO2: 44.7/100). Airmine updates local air quality forecasts four times daily.
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The dominant influence on Lecco's air quality is vehicle traffic funnelled along the narrow lake-and-mountain corridor, layered onto a setting on the eastern shore of Lake Como beneath the Grigne peaks within Lombardia. Ventilation here depends heavily on wind and rainfall, with the calmest, most stagnant periods generally producing the least favourable readings.
Today - 20 September | Pollution peaks at 21:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Fair
34.0/100
PM10 (coarse particles):
Fair
25.9/100
NO2 (nitrogen dioxide):
Fair
34.1/100
O3 (ozone):
Fair
24.7/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
9.9/100
PM1 (ultrafine particles):
Fair
26.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 21:00
AQI:
Moderate
44.7/100
PM2.5 (fine particles):
Fair
38.7/100
PM10 (coarse particles):
Fair
28.8/100
NO2 (nitrogen dioxide):
Moderate
44.7/100
O3 (ozone):
Good
19.9/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
1.0/100
HCHO (formaldehyde):
Good
10.8/100
PM1 (ultrafine particles):
Fair
28.3/100
Pollen forecast in Lecco
View pollen forecastFrequently Asked Questions
Is air quality bad in Lecco right now?
On 20 September 2026, overall air quality in Lecco is fair. AQI is the main air quality indicator at 34.1/100. Pollution peaks around 9:00 PM (NO2: 34.1/100).
Will air quality be worse tomorrow in Lecco?
On 21 September 2026, air quality conditions in Lecco will be worse than today, with AQI forecast at moderate at 44.7/100. Pollution peaks around 9:00 PM (NO2: 44.7/100).
When is air pollution at its worst in Lecco?
Lecco sees its worst air quality stretches line up with pine and oak pollen peaks and periods of vehicle traffic funnelled along the narrow lake-and-mountain corridor; outside of those windows, the Lombardia area generally settles into calmer, more breathable conditions.
Are air quality levels in Lecco 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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