Siena · WinterMonth summary
Siena weather in December
⚠️ Fair
🌡️ Temperature min / max
3°C – 11°C
🌧 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: Siena in December: 34% rain, 7.0h of sunshine. Better to wait for June.
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
🎯 Quiet season in the vineyards — intimate tastings and reduced prices In December, Siena sees 11°C during the day with 7.0h of sunshine per day. Expect rain on 34% of days — a light raincoat in the bag is recommended.
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Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌫️ January | 2°C | 10°C | 29% | 1.7 | 7.4h | 4.8/10 |
| ⛅ February | 3°C | 13°C | 33% | 2.7 | 8.8h | 5.7/10 |
| ⛅ March | 4°C | 15°C | 30% | 2.4 | 10.8h | 7.0/10 |
| 🌤️ April | 7°C | 19°C | 32% | 2.4 | 12.2h | 7.4/10 |
| 🌤️ May | 11°C | 22°C | 42% | 3.0 | 12.9h | 7.7/10 |
| ☀️ June | 16°C | 29°C | 22% | 1.5 | 14.1h | 9.0/10 |
| ☀️ July | 19°C | 32°C | 17% | 0.8 | 14.3h | 8.5/10 |
| ☀️ August | 19°C | 32°C | 19% | 1.2 | 13.0h | 8.2/10 |
| 🌤️ September | 15°C | 26°C | 28% | 2.8 | 11.7h | 8.3/10 |
| 🌤️ October | 11°C | 21°C | 27% | 3.4 | 9.8h | 7.5/10 |
| ⛅ November | 6°C | 15°C | 39% | 3.8 | 8.0h | 5.6/10 |
| 🌫️ December | 3°C | 11°C | 34% | 2.9 | 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 11°C, 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°C
- 🌧 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 11°C daytime and 3°C at night. 7.0h of sunshine per day. Pack warm clothes and favour indoor visits.
Accommodation
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