Climate almanac
Siena
Tuscany, Italy · 43.32°, 11.33°
What is the weather like in Siena in December?
In December, Siena is typically 52°F (11°C) during the day and 38°F (3°C) at night. The month brings about 3.4 in (87 mm) of precipitation in total.
- Average high52°F (11°C)
- Average low38°F (3°C)
- Precipitation3.4 in (87 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)