Last updated: August 23, 2025
In Fortezza, Italy, the average temperature in December hovers around -4°C (25°F). Expect chilly conditions, with minimum temperatures dipping as low as -21°C (-6°F) and highs reaching up to 8°C (47°F). Be prepared for some wet days, as precipitation accumulates to about 98 mm (3.9 in) over 12 days, and the air maintains a damp humidity level of 90%.
In December in Fortezza, the average temperature is -4°C (25°F). Maximums can reach 8°C (47°F), and minimums can drop as low as -21°C (-6°F). Travelers should be prepared for significant temperature fluctuations and pack accordingly for both chilly and potentially milder days.
In Fortezza in December, the precipitation amount is 98 mm (3.9 in) over the course of 12 days.
In Fortezza in December humidity is 90%. With an average temperature of -4°C (25°F), this humidity feels like a dense, icy blanket wrapping around you, making travel feel particularly stifling in the cold despite the sub-zero temperatures.
In Fortezza 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 Fortezza, you can visit Hourly UV Index in Fortezza.
UV Risk Categories
Weather in Fortezza varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fortezza, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 54 mm (2.1 inches) | 93% | low |
| February Weather | -2°C (29°F) | 48 mm (1.9 inches) | 89% | moderate |
| March Weather | 0°C (33°F) | 63 mm (2.5 inches) | 86% | high |
| April Weather | 4°C (40°F) | 79 mm (3.1 inches) | 83% | very high |
| May Weather | 8°C (47°F) | 122 mm (4.8 inches) | 78% | very high |
| June Weather | 14°C (57°F) | 91 mm (3.6 inches) | 79% | very high |
| July Weather | 15°C (59°F) | 98 mm (3.9 inches) | 82% | very high |
| August Weather | 15°C (59°F) | 120 mm (4.7 inches) | 80% | very high |
| September Weather | 11°C (52°F) | 86 mm (3.4 inches) | 83% | high |
| October Weather | 6°C (44°F) | 111 mm (4.4 inches) | 90% | moderate |
| November Weather | 1°C (34°F) | 114 mm (4.5 inches) | 89% | moderate |
| December Weather | -4°C (25°F) | 98 mm (3.9 inches) | 90% | low |