Last updated: August 23, 2025
The average temperature in San Martino, Italy during December hovers around 3°C (38°F). Expect chilly days where temperatures can dip to a minimum of -5°C (23°F) and rise to a comfortable maximum of 12°C (54°F). With an average precipitation of 156 mm (6.1 in) spread over 10 days, the month is rather damp, contributing to an average humidity of 85%. Make sure to bundle up and prepare for those rainy spells!
In December in San Martino, the average temperature is 3°C (38°F). Maximums can reach 12°C (54°F) and minimums can be as low as -5°C (23°F). Travelers should prepare for chilly weather and pack accordingly for both mild and cold conditions.
In San Martino in December, the precipitation amount is 156 mm (6.1 in) over a span of 10 days.
In San Martino in December, humidity is 85%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable as you contend with the heavy, cold air surrounding you.
In San Martino 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 San Martino, you can visit Hourly UV Index in San Martino.
UV Risk Categories
Weather in San Martino varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Martino, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 48 mm (1.9 inches) | 87% | low |
| February Weather | 4°C (40°F) | 76 mm (3.0 inches) | 79% | moderate |
| March Weather | 7°C (44°F) | 88 mm (3.5 inches) | 69% | moderate |
| April Weather | 11°C (51°F) | 157 mm (6.2 inches) | 71% | high |
| May Weather | 15°C (59°F) | 187 mm (7.4 inches) | 70% | very high |
| June Weather | 20°C (69°F) | 134 mm (5.3 inches) | 65% | very high |
| July Weather | 21°C (71°F) | 146 mm (5.7 inches) | 61% | very high |
| August Weather | 22°C (72°F) | 130 mm (5.1 inches) | 54% | very high |
| September Weather | 17°C (63°F) | 141 mm (5.5 inches) | 66% | high |
| October Weather | 12°C (55°F) | 148 mm (5.8 inches) | 83% | moderate |
| November Weather | 8°C (46°F) | 190 mm (7.5 inches) | 88% | moderate |
| December Weather | 3°C (38°F) | 156 mm (6.1 inches) | 85% | low |