Last updated: August 23, 2025
In December, the average temperature in Castel San Lorenzo, Italy hovers around 7°C (45°F), with a minimum dipping to -4°C (25°F) and a maximum reaching 17°C (63°F). Be prepared for 14 days of rain, totaling 192 mm (7.6 in) of precipitation, and expect the air to be quite damp, with an average humidity of 82%.
In December in Castel San Lorenzo, the average temperature is 7°C (45°F). Maximum temperatures can reach 17°C (63°F), while the minimum can drop to as low as -4°C (25°F). Travelers should be prepared for a mix of mild and chilly weather, making layering essential for outdoor activities.
In Castel San Lorenzo in December, the total precipitation amount is 192 mm (7.6 in) over the course of 14 days.
In Castel San Lorenzo in December humidity is 82%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities feel much colder and less inviting, which can make exploring less enjoyable unless you're dressed warmly.
In Castel San Lorenzo 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 San Lorenzo, you can visit Hourly UV Index in Castel San Lorenzo.
UV Risk Categories
Weather in Castel San Lorenzo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castel San Lorenzo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 112 mm (4.4 inches) | 82% | moderate |
| February Weather | 7°C (45°F) | 124 mm (4.9 inches) | 74% | moderate |
| March Weather | 8°C (47°F) | 122 mm (4.8 inches) | 70% | high |
| April Weather | 12°C (54°F) | 79 mm (3.1 inches) | 71% | very high |
| May Weather | 16°C (61°F) | 85 mm (3.3 inches) | 71% | very high |
| June Weather | 21°C (69°F) | 38 mm (1.5 inches) | 65% | very high |
| July Weather | 23°C (74°F) | 26 mm (1.0 inches) | 61% | very high |
| August Weather | 24°C (75°F) | 38 mm (1.5 inches) | 56% | very high |
| September Weather | 20°C (68°F) | 89 mm (3.5 inches) | 66% | very high |
| October Weather | 15°C (59°F) | 80 mm (3.1 inches) | 74% | high |
| November Weather | 11°C (53°F) | 196 mm (7.7 inches) | 80% | moderate |
| December Weather | 7°C (45°F) | 192 mm (7.6 inches) | 82% | low |