Last updated: August 23, 2025
In Aviano-Castello, Italy, the average temperature in December hovers around 4°C (40°F). Be prepared for chilly spells, as the minimum can dip to -5°C (23°F), while the maximum reaches a mild 14°C (57°F). Expect precipitation of about 164 mm (6.5 in) over 9 days, accompanied by high humidity levels of 85%. Dress warmly and stay dry!
In December in Aviano-Castello, the average temperature is 4°C (40°F). The maximum can reach 14°C (57°F), while the minimum can drop as low as -5°C (23°F). Be prepared for chilly weather and pack accordingly if you plan to visit during this time.
In Aviano-Castello in December, the total precipitation amount is 164 mm (6.5 in), which falls over a span of 9 days.
In Aviano-Castello in December, humidity is 85%. With an average temperature of 4°C (40°F), this humidity feels like an icy blanket wrapping around you, making outdoor activities feel much colder and damp, which can be quite uncomfortable for traveling.
In Aviano-Castello 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 Aviano-Castello, you can visit Hourly UV Index in Aviano-Castello.
UV Risk Categories
Weather in Aviano-Castello varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Aviano-Castello, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 49 mm (1.9 inches) | 87% | low |
| February Weather | 5°C (42°F) | 77 mm (3.0 inches) | 79% | moderate |
| March Weather | 8°C (46°F) | 84 mm (3.3 inches) | 69% | moderate |
| April Weather | 12°C (54°F) | 155 mm (6.1 inches) | 71% | high |
| May Weather | 16°C (61°F) | 175 mm (6.9 inches) | 70% | very high |
| June Weather | 21°C (71°F) | 110 mm (4.3 inches) | 65% | very high |
| July Weather | 23°C (73°F) | 101 mm (4.0 inches) | 61% | very high |
| August Weather | 23°C (74°F) | 90 mm (3.5 inches) | 54% | very high |
| September Weather | 18°C (65°F) | 134 mm (5.3 inches) | 66% | high |
| October Weather | 14°C (57°F) | 143 mm (5.6 inches) | 83% | moderate |
| November Weather | 9°C (48°F) | 191 mm (7.5 inches) | 88% | moderate |
| December Weather | 4°C (40°F) | 164 mm (6.5 inches) | 85% | low |