Worst air pollution Guidonia Montecelio, today and tomorrow
Today (16 July): Air quality in Guidonia Montecelio is fair. HCHO is fair; AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 51.8/100).
Tomorrow (17 July 2026): Air quality in Guidonia Montecelio is fair. All pollutants stay as today. Pollution peaks around 11:00 AM (O3: 48.5/100). 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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vehicle traffic on the Via Tiburtina and Rome commuter corridor is the main factor behind local air quality trends in Guidonia Montecelio, set against its position at the foot of the Cornicolani hills near Rome within Lazio. Days with active weather systems tend to bring the clearest conditions, while extended calm spells allow local emissions to build up more noticeably.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
51.8/100
PM2.5 (fine particles):
Good
13.6/100
PM10 (coarse particles):
Good
6.9/100
NO2 (nitrogen dioxide):
Good
15.7/100
O3 (ozone):
Medium
51.8/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.3/100
PM1 (ultrafine particles):
Good
15.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Medium
48.5/100
PM2.5 (fine particles):
Good
15.9/100
PM10 (coarse particles):
Good
8.8/100
NO2 (nitrogen dioxide):
Good
15.9/100
O3 (ozone):
Medium
48.5/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.6/100
PM1 (ultrafine particles):
Good
17.2/100
Pollen forecast in Guidonia Montecelio
View pollen forecastFrequently Asked Questions
Is air quality bad in Guidonia Montecelio right now?
On 16 July 2026, overall air quality in Guidonia Montecelio is fair. HCHO is the main pollutant at 20.3/100. Pollution peaks around 12:00 PM (O3: 51.8/100).
Will air quality be worse tomorrow in Guidonia Montecelio?
On 17 July 2026, air quality conditions in Guidonia Montecelio will be similar to today, with HCHO forecast at fair at 21.6/100. Pollution peaks around 11:00 AM (O3: 48.5/100).
When is air pollution at its worst in Guidonia Montecelio?
People in Guidonia Montecelio tend to notice worse air when olive and cypress pollen peaks, or because of vehicle traffic on the Via Tiburtina and Rome commuter corridor; the remainder of the year in Lazio generally brings clearer, steadier conditions, especially on breezier days that help disperse local emissions across the surrounding countryside and built-up streets alike.
Are air quality levels in Guidonia Montecelio 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