Siena Weather in December
9.7°C high · 3.3°C low · 78 mm rain · 2.1h sun
Dec is a cool month in Siena — not peak season, but a good time to avoid crowds.
December at a glance
| Metric | Value |
|---|---|
| Average high | 9.7°C |
| Average low | 3.3°C |
| Rainfall | 78 mm |
| Sunshine | 2.1 hours/day |
| Daylight | 8.8 hours |
What to pack in December
Pack a warm coat and layers for Siena in December.
Siena weather by month
JanFebMarAprMayJunJulAugSepOctNovDec
Frequently asked questions
What is the weather in Siena in December?
Highs of 9.7°C and lows of 3.3°C, with about 78 mm of rain and 2.1 hours of sunshine per day.
Is December a good time to visit Siena?
Dec is a cool month in Siena — not peak season, but a good time to avoid crowds.
What to do in Siena · Best time to visit Siena
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.