Weather in Siena for December 2026
In general, the average temperature in Siena at the beginning of December is 10.9 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 10.4 °C by the end of December.
The climate of Siena in December is notably wet, with an average of 14 rainy days, and a total of 58.2 mm of precipitation.
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Siena Weather December
Temperatures trend during December in Siena
December weather in Siena day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Sunny | 14° /6° | 0.4 mm | 4 | |
| 2 Dec. |  Light rain shower | 13° /4° | 3.1 mm | 4 | |
| 3 Dec. |  Partly cloudy | 10° /3° | 0 mm | 3 | |
| 4 Dec. | Patchy rain possible | 9° /3° | 0.9 mm | 3 | |
| 5 Dec. |  Moderate rain | 10° /3° | 8.1 mm | 3 | |
| 6 Dec. |  Overcast | 10° /1° | 0 mm | 3 | |
| 7 Dec. | Sunny | 10° /1° | 0.3 mm | 3 | |
| 8 Dec. | Patchy rain possible | 9° /2° | 5 mm | 3 | |
| 9 Dec. |  Mist | 9° /3° | 5.8 mm | 2 | |
| 10 Dec. | Patchy rain possible | 11° /4° | 0.2 mm | 3 | |
| 11 Dec. | Patchy rain possible | 11° /4° | 0.2 mm | 3 | |
| 12 Dec. | Sunny | 12° /5° | 0.3 mm | 4 | |
| 13 Dec. | Light rain shower | 11° /4° | 1.5 mm | 3 | |
| 14 Dec. | Light rain shower | 11° /4° | 1.6 mm | 3 | |
| 15 Dec. | Sunny | 11° /3° | 0.6 mm | 4 | |
| 16 Dec. | Sunny | 11° /3° | 0.7 mm | 3 | |
| 17 Dec. | Partly cloudy | 11° /4° | 1.8 mm | 3 | |
| 18 Dec. | Patchy rain possible | 13° /6° | 0.2 mm | 3 | |
| 19 Dec. | Sunny | 12° /6° | 1.2 mm | 3 | |
| 20 Dec. | Overcast | 12° /4° | 10.1 mm | 2 | |
| 21 Dec. | Partly cloudy | 10° /3° | 0 mm | 2 | |
| 22 Dec. |  Cloudy | 11° /3° | 1.7 mm | 2 | |
| 23 Dec. | Partly cloudy | 9° /4° | 3.8 mm | 2 | |
| 24 Dec. | Mist | 10° /3° | 6.1 mm | 2 | |
| 25 Dec. | Cloudy | 10° /3° | 3.6 mm | 2 | |
| 26 Dec. | Partly cloudy | 10° /2° | 0 mm | 2 | |
| 27 Dec. | Sunny | 11° /1° | 0 mm | 2 | |
| 28 Dec. | Overcast | 11° /2° | 0 mm | 2 | |
| 29 Dec. | Sunny | 11° /3° | 0.2 mm | 2 | |
| 30 Dec. | Patchy rain possible | 10° /4° | 0.7 mm | 2 | |
| 31 Dec. | Patchy rain possible | 10° /3° | 0.2 mm | 2 | |
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Siena weather in December vs November vs January
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible | Sunny | Patchy rain possible |
| Temperatures | 14°/6° | 10°/4° | 10°/3° |
| Rainfall | 59 mm | 58 mm | 80 mm |
| Wind | 14.5 km/h | 10 km/h | 14.1 km/h |
| Humidity | 76% | 79% | 80% |
| Rainy days | 14 days | 14 days | 19 days |
| Dry days | 16 days | 17 days | 12 days |
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Siena in December - FAQ
What are the expected maximum and minimum temperatures in Siena during December?
How much rainfall should be expected in Siena during December?
What are the typical wind conditions in Siena during December?
What to pack to Siena in December?
As you prepare for your trip to Siena in December, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Siena, during December, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long trousers
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
December rainfall patterns in Siena
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Where is Siena?Get accurate weather forecasts for Siena, located at latitude 43.318 and longitude 11.331. Stay updated with localized weather information tailored for Siena.