Last updated: June 24, 2025
In December, the average temperature in Saint Leon, United States hovers around 3°C (38°F). Expect chilly days where the mercury can dip to a bone-chilling -17°C (2°F), while sunny spells may push it up to a pleasant 19°C (67°F). With an average precipitation of 102 mm (4.0 in) spread over 10 days, and humidity levels at a steamy 87%, prepare for a mix of wet and cool conditions!
In December in Saint Leon, the average temperature is 3°C (38°F). The maximum can reach 19°C (67°F), while the minimum can be as low as -17°C (2°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is essential.
In Saint Leon in December, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.
In Saint Leon in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Saint Leon in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Saint Leon, you can check the information here.
UV Risk Categories
Weather in Saint Leon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint Leon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 80 mm (3.1 inches) | 87% | moderate |
| February Weather | 2°C (36°F) | 106 mm (4.2 inches) | 85% | moderate |
| March Weather | 7°C (45°F) | 136 mm (5.3 inches) | 86% | high |
| April Weather | 12°C (54°F) | 117 mm (4.6 inches) | 84% | very high |
| May Weather | 18°C (65°F) | 129 mm (5.1 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 135 mm (5.3 inches) | 82% | very high |
| July Weather | 25°C (77°F) | 115 mm (4.5 inches) | 79% | very high |
| August Weather | 24°C (75°F) | 103 mm (4.1 inches) | 70% | very high |
| September Weather | 21°C (70°F) | 83 mm (3.3 inches) | 69% | very high |
| October Weather | 15°C (59°F) | 98 mm (3.9 inches) | 76% | high |
| November Weather | 6°C (43°F) | 97 mm (3.8 inches) | 88% | moderate |
| December Weather | 3°C (38°F) | 102 mm (4.0 inches) | 87% | moderate |