Last updated: August 23, 2025
In December, the average temperature in Castel d'Aiano, Italy hovers around 4°C (39°F). Expect chilly days with temperatures dipping as low as -8°C (19°F) and occasionally reaching up to 14°C (57°F). Be prepared for 117 mm (4.6 in) of precipitation over 12 days, contributing to an average humidity level of 85%. Don't forget your umbrella!
In December in Castel d'Aiano, the average temperature is 4°C (39°F). Maximum temperatures can reach 14°C (57°F), while minimums can drop as low as -8°C (19°F). It's essential to pack warm clothing and be prepared for chilly conditions if you're planning to travel during this time.
In Castel d'Aiano in December, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.
In Castel d'Aiano in December, humidity is 85%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to ward off the cold and moisture.
In Castel d'Aiano 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 d'Aiano, you can visit Hourly UV Index in Castel d'Aiano.
UV Risk Categories
Weather in Castel d'Aiano varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castel d'Aiano, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 45 mm (1.8 inches) | 87% | low |
| February Weather | 5°C (41°F) | 92 mm (3.6 inches) | 79% | moderate |
| March Weather | 7°C (44°F) | 72 mm (2.8 inches) | 69% | high |
| April Weather | 11°C (51°F) | 94 mm (3.7 inches) | 71% | high |
| May Weather | 14°C (58°F) | 166 mm (6.5 inches) | 70% | very high |
| June Weather | 20°C (68°F) | 69 mm (2.7 inches) | 65% | very high |
| July Weather | 22°C (72°F) | 72 mm (2.8 inches) | 61% | very high |
| August Weather | 22°C (72°F) | 81 mm (3.2 inches) | 54% | very high |
| September Weather | 17°C (64°F) | 114 mm (4.5 inches) | 66% | high |
| October Weather | 13°C (55°F) | 98 mm (3.9 inches) | 83% | moderate |
| November Weather | 8°C (46°F) | 162 mm (6.4 inches) | 88% | moderate |
| December Weather | 4°C (39°F) | 117 mm (4.6 inches) | 85% | low |