Last updated: August 23, 2025
In San Silvestro, Italy, the average temperature in December hovers around 8°C (46°F). Expect a minimum dip to -2°C (28°F) and a pleasant maximum of 17°C (63°F). Be prepared for 90 mm (3.6 in) of precipitation spread across 10 days, and experience a relatively high average humidity of 86%.
In December in San Silvestro, the average temperature is 8°C (46°F), with a maximum reaching 17°C (63°F) and a minimum dropping as low as -2°C (28°F). Travelers should be prepared for a range of temperatures and dress in layers to ensure comfort throughout the day.
In San Silvestro in December, the precipitation amount is 90 mm (3.6 in) spread over the course of 10 days.
In San Silvestro in December humidity is 86%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while exploring.
In San Silvestro in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in San Silvestro, you can visit Hourly UV Index in San Silvestro.
UV Risk Categories
Weather in San Silvestro varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Silvestro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (42°F) | 72 mm (2.8 inches) | 85% | low |
| February Weather | 7°C (46°F) | 65 mm (2.6 inches) | 78% | moderate |
| March Weather | 9°C (48°F) | 89 mm (3.5 inches) | 69% | high |
| April Weather | 13°C (55°F) | 70 mm (2.7 inches) | 71% | high |
| May Weather | 17°C (63°F) | 119 mm (4.7 inches) | 71% | very high |
| June Weather | 22°C (72°F) | 55 mm (2.1 inches) | 63% | very high |
| July Weather | 24°C (75°F) | 72 mm (2.8 inches) | 59% | very high |
| August Weather | 25°C (77°F) | 41 mm (1.6 inches) | 54% | very high |
| September Weather | 20°C (68°F) | 77 mm (3.0 inches) | 67% | high |
| October Weather | 15°C (60°F) | 75 mm (3.0 inches) | 78% | moderate |
| November Weather | 12°C (54°F) | 136 mm (5.4 inches) | 84% | moderate |
| December Weather | 8°C (46°F) | 90 mm (3.6 inches) | 86% | low |