Last updated: August 23, 2025
In December, the average temperature in Costano, Italy hovers around 6°C (43°F). Expect a minimum of -5°C (24°F) and a maximum of 16°C (60°F). Be prepared for some wet weather, as the area receives about 127 mm (5.0 in) of precipitation over 12 days, with an average humidity of 83%.
In December in Costano, the average temperature is 6°C (43°F), with maximums reaching up to 16°C (60°F) and minimums dropping as low as -5°C (24°F). This varied climate offers travelers the opportunity to experience a range of outdoor activities, so be sure to pack accordingly for both chilly and mild weather.
In Costano in December, the precipitation amount is 127 mm (5.0 in) occurring over the course of 12 days.
In Costano in December, humidity is 83%. With an average temperature of 6°C (43°F), this humidity feels like a brisk chill that can make you feel colder than the actual temperature, often leading to a damp and uncomfortable experience for traveling.
In Costano 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 Costano, you can visit Hourly UV Index in Costano.
UV Risk Categories
Weather in Costano varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Costano, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 53 mm (2.1 inches) | 84% | low |
| February Weather | 7°C (45°F) | 71 mm (2.8 inches) | 76% | moderate |
| March Weather | 8°C (47°F) | 83 mm (3.3 inches) | 68% | high |
| April Weather | 12°C (54°F) | 67 mm (2.6 inches) | 70% | high |
| May Weather | 16°C (62°F) | 76 mm (3.0 inches) | 69% | very high |
| June Weather | 22°C (71°F) | 44 mm (1.7 inches) | 62% | very high |
| July Weather | 24°C (76°F) | 30 mm (1.2 inches) | 57% | very high |
| August Weather | 25°C (77°F) | 40 mm (1.6 inches) | 55% | very high |
| September Weather | 20°C (67°F) | 97 mm (3.8 inches) | 66% | high |
| October Weather | 15°C (59°F) | 70 mm (2.7 inches) | 79% | moderate |
| November Weather | 10°C (51°F) | 117 mm (4.6 inches) | 84% | moderate |
| December Weather | 6°C (43°F) | 127 mm (5.0 inches) | 83% | low |