What is the air quality in Siena today?

The current Air Quality Index (AQI) in Siena is 3 (Good). PM2.5 concentration is 0.67 µg/m³.

What is the temperature in Siena right now?

The current temperature in Siena is 8.7°C (feels like 7.9°C). Humidity is 94.9% and wind speed is 6.3 km/h.

Is it safe to go outside in Siena?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0 (Very High).

Air Quality in Siena, Italy

Drizzle

8.7°C · 94.9% humidity

8.7°

Feels 7.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

75 8pm

75 11pm

99 2am

99 5am

75 8am

50 11am

75 2pm

12 5pm

94.9%

Humidity

6.3 km/h

Wind E

1005.5 hPa

Pressure

9.4

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Siena?

Temperature & Precipitation

PM2.50.67 µg/m³ ✓ WHO

Good

PM1034.3 µg/m³

Good

UV INDEX9.4

Very High

What is the 7-day forecast for Siena?

04-09

14.7° 7.5°

2.25 mm

04-10

16.8° 8.7°

7.75 mm

04-11

17.0° 8.3°

04-12

15.2° 5.0°

04-13

13.7° 3.3°

0.88 mm

04-14

9.6° 7.6°

3.19 mm

04-15

13.9° 6.8°

Both models agree Avg diff: 4.9°C

What cities are near Siena?

Colle di Val d'Elsa Poggibonsi 1 Montevarchi San Giovanni Valdarno 3 Arezzo Scandicci Campo di Marte Florence Empoli San Miniato

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T23:08 UTC.