Last updated: August 23, 2025
In December, the average temperature in Castel San Pietro Terme, Italy hovers around 6°C (42°F). Expect minimums to dip to -4°C (24°F) and highs reaching up to 17°C (62°F). With an average humidity of 85%, it's a rather moist time of year, complemented by 67 mm (2.7 in) of precipitation spread over 10 days. Prepare for a chilly and damp atmosphere!
In December in Castel San Pietro Terme, the average temperature is 6°C (42°F), with a maximum reaching 17°C (62°F) and a minimum dropping as low as -4°C (24°F). Be prepared for a range of temperatures when traveling, as layering clothing will help you stay comfortable throughout the day.
In Castel San Pietro Terme in December, the precipitation amount is 67 mm (2.7 in) over a span of 10 days.
In Castel San Pietro Terme in December, humidity is 85%. With an average temperature of 6°C (42°F), this humidity feels like walking through a thick mist, making even short strolls feel damp and chilly, which can be uncomfortable for traveling.
In Castel San Pietro Terme 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 Castel San Pietro Terme, you can visit Hourly UV Index in Castel San Pietro Terme.
UV Risk Categories
Weather in Castel San Pietro Terme varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castel San Pietro Terme, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 23 mm (0.9 inches) | 87% | low |
| February Weather | 7°C (45°F) | 73 mm (2.9 inches) | 79% | moderate |
| March Weather | 10°C (50°F) | 46 mm (1.8 inches) | 69% | moderate |
| April Weather | 14°C (58°F) | 55 mm (2.2 inches) | 71% | high |
| May Weather | 19°C (66°F) | 100 mm (3.9 inches) | 70% | very high |
| June Weather | 25°C (76°F) | 43 mm (1.7 inches) | 65% | very high |
| July Weather | 26°C (80°F) | 68 mm (2.7 inches) | 61% | very high |
| August Weather | 26°C (80°F) | 48 mm (1.9 inches) | 54% | very high |
| September Weather | 21°C (70°F) | 84 mm (3.3 inches) | 66% | high |
| October Weather | 16°C (60°F) | 61 mm (2.4 inches) | 83% | moderate |
| November Weather | 11°C (51°F) | 109 mm (4.3 inches) | 88% | moderate |
| December Weather | 6°C (42°F) | 67 mm (2.7 inches) | 85% | low |