Last updated: August 23, 2025
In December, the average temperature in Castel San Niccolo, Italy hovers around 4°C (40°F). Expect a chilly range where temperatures can dip to a brisk -6°C (22°F) at their lowest and reach a mild 13°C (56°F) at their highest. This month also brings about 130 mm (5.1 in) of precipitation spread over 14 days, contributing to an average humidity of 83%. Dress warmly and be prepared for some wet days!
In December in Castel San Niccolo, the average temperature is 4°C (40°F). Maximums can reach 13°C (56°F), and minimums can drop as low as -6°C (22°F). Be sure to pack warm clothing and prepare for variable weather conditions during your travels.
In Castel San Niccolo in December, the total precipitation amount is 130 mm (5.1 in) over the course of 14 days.
In Castel San Niccolo in December humidity is 83%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring you to bundle up while bracing against the heavy, cold air.
In Castel San Niccolo 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 Niccolo, you can visit Hourly UV Index in Castel San Niccolo.
UV Risk Categories
Weather in Castel San Niccolo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castel San Niccolo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 61 mm (2.4 inches) | 84% | low |
| February Weather | 5°C (42°F) | 106 mm (4.2 inches) | 76% | moderate |
| March Weather | 7°C (44°F) | 91 mm (3.6 inches) | 68% | high |
| April Weather | 10°C (51°F) | 100 mm (3.9 inches) | 70% | high |
| May Weather | 14°C (58°F) | 140 mm (5.5 inches) | 69% | very high |
| June Weather | 20°C (68°F) | 67 mm (2.6 inches) | 62% | very high |
| July Weather | 22°C (72°F) | 56 mm (2.2 inches) | 57% | very high |
| August Weather | 22°C (72°F) | 54 mm (2.1 inches) | 55% | very high |
| September Weather | 17°C (64°F) | 96 mm (3.8 inches) | 66% | high |
| October Weather | 13°C (55°F) | 99 mm (3.9 inches) | 79% | moderate |
| November Weather | 8°C (47°F) | 142 mm (5.6 inches) | 84% | moderate |
| December Weather | 4°C (40°F) | 130 mm (5.1 inches) | 83% | low |