Air quality
Air quality in Monza today
Updated
Moderate (US AQI 64) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Sun, Oct 25, 7:00 pm (18:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Monza, Lombardy, Italy, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 64 Moderate
- PM2.5
- 21 µg/m³ 1.4× WHO 24-h guideline
- PM10
- 27 µg/m³
- Ozone
- 18 µg/m³
- Dominant pollutant
- PM2.5 sub-index 64
- Best hour tomorrow
- 6:00 am AQI 63
- European AQI
- 58
Air quality in Monza right now
Right now the modelled US Air Quality Index for Monza, Lombardy, Italy is 64, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 64. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 21 µg/m³, 1.4 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 27 µg/m³ against a guideline of 45; ozone is 18 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 57 µg/m³ (above the 24-hour guideline of 25).
Also this hour: carbon monoxide 282 µg/m³.
Monza AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 63 around Mon 4:00 am to 71 around Mon 7:00 pm, staying "Moderate" throughout.
The following day is expected to be worse, averaging about 89 against 65 for the next 24 hours.
| Local time (Europe/Rome) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 7:00 pm | 64 | Moderate | 21.3 | 27 | 18 |
| Sun 10:00 pm | 64 | Moderate | 23.1 | 31 | 17 |
| Mon 1:00 am | 64 | Moderate | 13.8 | 16 | 30 |
| Mon 4:00 am | 63 | Moderate | 9 | 11 | 26 |
| Mon 7:00 am | 63 | Moderate | 19.8 | 23 | 12 |
| Mon 10:00 am | 63 | Moderate | 27.2 | 31 | 32 |
| Mon 1:00 pm | 65 | Moderate | 21.8 | 24 | 51 |
| Mon 4:00 pm | 68 | Moderate | 25.6 | 26 | 68 |
| Mon 7:00 pm | 71 | Moderate | 35.7 | 39 | 17 |
| Mon 10:00 pm | 75 | Moderate | 42.5 | 45 | 12 |
| Tue 1:00 am | 79 | Moderate | 37.2 | 45 | 14 |
| Tue 4:00 am | 86 | Moderate | 37.6 | 45 | 18 |
| Tue 7:00 am | 91 | Moderate | 40.5 | 50 | 9 |
| Tue 10:00 am | 96 | Moderate | 39 | 46 | 28 |
| Tue 1:00 pm | 100 | Moderate | 37.3 | 42 | 56 |
| Tue 4:00 pm | 104 | Unhealthy for Sensitive Groups | 37.8 | 45 | 67 |
| Tue 7:00 pm | 109 | Unhealthy for Sensitive Groups | 50.9 | 66 | 8 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Monza tomorrow
Between 6 am and 9 pm local time, the cleanest air tomorrow is forecast around 6:00 am (AQI 63, Moderate) and the worst around 9:00 pm (AQI 74). That is a swing of 11 points, so a run or walk around 6:00 am is noticeably better.
Monza vs the rest of Italy
Across 14 Italy cities we track, the average US AQI right now is 45 (Good). Monza at 64 is 19 points worse than average.
It ranks 14 of 14 from cleanest to most polluted; the cleanest is Genoa (34) and the most polluted Monza (65).
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Monza
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Milan | 14 km | 65 | Moderate | 20.5 |
| Genoa | 133 km | 34 | Good | 5.7 |
| Turin | 136 km | 62 | Moderate | 18.3 |
| Bologna | 202 km | 41 | Good | 11.6 |
| Zürich | 206 km | 29 | Good | 2.3 |
| Mestre | 232 km | 45 | Good | 6.3 |
| Venice | 239 km | 45 | Good | 6.3 |
| Florence | 254 km | 48 | Good | 7 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Monza, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Wildfire smoke
PM2.5 is forecast to reach 36 µg/m³ in the next 24 hours while NASA satellites detected 18 fire hotspots within 300 km in the last day (nearest about 41 km away). Smoke is a likely contributor: keep windows closed, run an air purifier or HVAC filter, and check the fire map before heading out.
Advice for sensitive groups
At 64, most people are fine outdoors. If you are unusually sensitive to PM2.5, keep long or intense workouts to the cleaner hours shown above.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Monza
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.