Siena · WinterMonth summary
Siena weather in December
⚠️ Fair
🌡️ Temperature min / max
37°F – 52°F
🌧 Rainy days
34% of days
☀️ Sunshine
7.0h per day on average
🌊 🌊 Season
Winter
⭐ ⭐ Weather score
4.6/10
📅 📅 Best month
June (9.0/10)
Quick decision
Should you visit Siena in December?
⚠️ Fair
✅ Yes if: you enjoy winter atmosphere and the lowest prices of the year.
❌ No if: you're looking for sunshine or outdoor activities.
Our take: December is a difficult time for Siena. June (9.0/10) is much more favourable.
By trip type
Siena in December by trip type
- 🏙️ 🏙️ City break / culture : ⚠️ Possible
- 🚶 🚶 Outdoor activities : ❌ Not recommended
- 🏖️ Beach / swimming : ❌ Not recommended
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in December
In December, Siena sees 11°F during the day with 7.0h of sunshine per day. Expect rain on 34% of days — a light raincoat in the bag is recommended.
Browse by month
All months for Siena
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌫️ January | 36°F | 50°F | 29% | 0.1in | 7.4h | 4.8/10 |
| ⛅ February | 37°F | 55°F | 33% | 0.1in | 8.8h | 5.7/10 |
| ⛅ March | 39°F | 59°F | 30% | 0.1in | 10.8h | 7.0/10 |
| 🌤️ April | 45°F | 66°F | 32% | 0.1in | 12.2h | 7.4/10 |
| 🌤️ May | 52°F | 72°F | 42% | 0.1in | 12.9h | 7.7/10 |
| ☀️ June | 61°F | 84°F | 22% | 0.1in | 14.1h | 9.0/10 |
| ☀️ July | 66°F | 90°F | 17% | 0.0in | 14.3h | 8.5/10 |
| ☀️ August | 66°F | 90°F | 19% | 0.0in | 13.0h | 8.2/10 |
| 🌤️ September | 59°F | 79°F | 28% | 0.1in | 11.7h | 8.3/10 |
| 🌤️ October | 52°F | 70°F | 27% | 0.1in | 9.8h | 7.5/10 |
| ⛅ November | 43°F | 59°F | 39% | 0.1in | 8.0h | 5.6/10 |
| 🌫️ December | 37°F | 52°F | 34% | 0.1in | 7.0h | 4.6/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In December, Siena averages 52°F, 34% rainy days and 7.0h of sunshine per day. Overall weather score: 4.6/10.
See methodology →
Comparison
December vs June (best month)
The best month is June (score 9.0/10). Difference:
- 🌡️ Max temperature : +18°F
- 🌧 Rainy days : -12%
- ☀️ Sunshine : +7.1h/day
FAQ
FAQ — Siena in December
Is December a good time to visit Siena?
December is not recommended for Siena (score 4.6/10). With 34% rainy days and 7.0h of sunshine, consider June (9.0/10) instead.
What's the weather like in Siena in December?
It's cool with 52°F daytime and 37°F at night. 7.0h of sunshine per day. Pack warm clothes and favour indoor visits.
Accommodation
Find a place to stay in Siena
Find places to stay in Siena in December
Search on Hotels.com
Activities & tours
Activities and tours in Siena
Guided tours, skip-the-line tickets and local experiences.
Browse activities on GetYourGuide
Flights
Find a flight to Siena
Compare flights from all airlines.
Search flights
←
Explore also
Similar destinations in December
Split🌍 Top destinations
Other top destinations in December
Jordan
PaphosWeather rankings
Compare destinations by weather
Best in EuropeGuides & comparisons