Air Quality in Siena, Italy

Rain
15.3°C · 88.7% humidity
15.3°
Feels 15.3°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
54 10pm
54
54
28 1am
35
41
44 4am
47
49
50 7am
51
52
33 10am
33
26
27 1pm
27
27
27 4pm
27
27
27 7pm
34
34
AD 728×90

Siena's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level. Current PM2.5 concentration in Siena is 1.3× the WHO annual guideline of 5 µg/m³.

88.7%
Humidity
23.3 km/h
Wind S
1010.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
28
6.6 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

Temperature & Precipitation

PM2.56.6 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
05-28
26.1° 15.4°
0.19 mm
05-29
19.3° 14.0°
15.31 mm
05-30
18.9° 12.9°
10.75 mm
05-31
24.8° 11.6°
0.06 mm
06-01
27.0° 14.5°
0.13 mm
06-02
21.8° 14.6°
6.19 mm
06-03
26.9° 13.4°
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-28T23:08 UTC.