Month-by-month travel weather
Siena December weather
Siena, Italy · December
Plan for after-sunset comfort
December is early winter. Midday can feel okay on clear days, but evenings often cool down quickly on the hill.
Rain can make it feel damper and colder than expected—layers and waterproofing help.
December averages at a glance
Average low
around 3–5°C
Average high
around 9–12°C
Average rainfall
around 55–105 mm
Wet days
about 7–11 days
What to wear in December in Siena
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Coat/jacket with knit layers works well.
- • A scarf helps comfort at night.
- • Umbrella/waterproof pouch helps on wet days.
Travel tips for visiting Siena in December
- • If evenings are on your plan, bring extra warmth.
- • Use indoor anchors when the weather feels damp and grey.
December weather in Siena — FAQ
Q. Is December cold in Siena?
A. It can feel chilly at night, especially when damp.
Q. Does it rain often in December?
A. Rain is a regular variable—having an umbrella option helps.
Explore Siena
These pages are connected so you can compare conditions and decide for yourself.