Frequent temperatures in Siena through the whole of December is 5. You can expect highs around 9 with lows about 4. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 5 |
| High Temperature | 9 |
| Low Temperature | 4 |
| Sunshine Per Day | 4 |
Siena, Italy Weather in December FAQs
Typically what weather am I expecting?
The usual weather is 5 celsius although it does change during the day
On average whats the weather difference summer vs. winter?
The daily average temperate varies by 7 change in average daily temperature
How cold can it get?
Generally the lows are 4 Useful Links: Siena Weather: Average Weather & Yearly Climate