Early winter · Weather & things to do
Siena in December
Siena cools off: highs slip to 48°F (9°C), from 56°F in November, with lows of 34°F (1°C) and about 3.1 in (78 mm) of rain.
With a comfort score of 56/100 (11th of 12), it's one of the toughest months, held back mainly by cool days.
- Avg high
- 48°F (9°C)
- Avg low
- 34°F (1°C)
- Rain
- 3.1 in (78 mm)
- Humidity
- 89%
- Cloud cover
- 67%
- Daylight
- ~8 h 48 min
- Comfort score
- 56/100 · Fair
What December feels like
Cool days top out near 48°F (9°C), better for brisk walks than lingering outside.
Lows average 34°F (1°C).
Showers are part of the month, adding up to about 3.1 in (78 mm).
Daylight is short, roughly 8 h 48 min mid-month, so start sightseeing early.
Plan around December
December is one of the lower-scoring months here; the best are April – June and September & October.
- Inside the wettest three-month stretch, October – December.
- Shortest days of the year, about 8 h 48 min of daylight.
- Comfort slips from 66/100 in November to 56/100.
- Our Tuscany Hill Towns route recommends Apr – Jun, Sep – Oct, so December falls outside its suggested window.
What to pack for December
- Insulated jackethighs only 48°F
- Packable rain jacket or umbrellaabout 3.1 in of rain
- Comfortable walking shoesmost picks involve some walking
What to do in Siena in December
A mixed month: these picks balance outdoor stops with indoor fallbacks.
Santa Maria della Scala
Former medieval hospital opposite the cathedral, now a museum complex.
Siena Cathedral
Striped marble cathedral with an inlaid floor and the Piccolomini Library.
Antica Osteria Da Divo
Restaurant with tables in Etruscan caves beneath the city.
Pasticceria Nannini
Siena's classic café for espresso, ricciarelli and panforte.
Osteria Le Logge
Old pharmacy turned restaurant serving refined Tuscan food.
Nearby in December
- Chianti in December~18 mi · highs 49°F, 3.1 in rain · similar daytime temperatures, about as wet
- Val d'Orcia in December~24 mi · highs 47°F, 3.3 in rain · similar daytime temperatures, about as wet
- Florence in December~31 mi · highs 50°F, 2.8 in rain · similar daytime temperatures, about as wet
- Piran in December~188 mi · highs 48°F, 3.8 in rain · similar daytime temperatures, wetter
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Siena in December: quick answers
Is December a good time to visit Siena?
It's one of the tougher months here, scoring 56/100, held back mainly by cool days. The best months are April – June and September & October. Expect highs of 48°F (9°C) and 3.1 in (78 mm) of rain. Our Tuscany Hill Towns route recommends Apr – Jun, Sep – Oct, so December is outside its suggested window.
How cold is Siena in December?
Average highs are 48°F (9°C) and average lows 34°F (1°C), making it the 2nd-coldest month by daytime highs.
Does it rain a lot in Siena in December?
Some: about 3.1 in (78 mm) of rain falls across December on average, the 3rd-wettest month of the year. The annual total is about 28.6 in (727 mm).
What should I pack for Siena in December?
Bring insulated jacket (highs only 48°F), packable rain jacket or umbrella (about 3.1 in of rain) and comfortable walking shoes (most picks involve some walking).
Planning Siena in December?
Share this December plan with your group, poll everyone on dates and keep the packing list in one place.