Last updated: August 27, 2025
In December, the average temperature in Kotlje, Slovenia hovers around -1°C (30°F). Expect chilly extremes, with minimums plummeting to -17°C (1°F) and maximums reaching up to 11°C (52°F). This month also brings about 88 mm (3.5 in) of precipitation over 10 days, contributing to a high average humidity of 89%. Be prepared for a cold and wet experience!
In December in Kotlje, the average temperature is -1°C (30°F). Maximums can reach 11°C (52°F), while minimums can drop as low as -17°C (1°F). Travelers should be prepared for a wide range of temperatures and dress in layers for fluctuating weather conditions.
In Kotlje in December, the precipitation amount is 88 mm (3.5 in) spread over a duration of 10 days.
In Kotlje in December humidity is 89%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that wraps around you, making outdoor travel uncomfortable and brisk, as the cold air sharpens the dampness, leaving you feeling colder than the thermometer suggests.
In Kotlje 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 Kotlje, you can visit Hourly UV Index in Kotlje.
UV Risk Categories
Weather in Kotlje varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Kotlje, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 38 mm (1.5 inches) | 91% | low |
| February Weather | 1°C (34°F) | 64 mm (2.5 inches) | 87% | moderate |
| March Weather | 4°C (39°F) | 66 mm (2.6 inches) | 82% | moderate |
| April Weather | 8°C (47°F) | 97 mm (3.8 inches) | 79% | high |
| May Weather | 12°C (55°F) | 184 mm (7.3 inches) | 74% | very high |
| June Weather | 18°C (64°F) | 137 mm (5.4 inches) | 75% | very high |
| July Weather | 19°C (66°F) | 175 mm (6.9 inches) | 74% | very high |
| August Weather | 19°C (66°F) | 180 mm (7.1 inches) | 68% | very high |
| September Weather | 14°C (57°F) | 168 mm (6.6 inches) | 74% | high |
| October Weather | 9°C (49°F) | 78 mm (3.1 inches) | 88% | moderate |
| November Weather | 4°C (40°F) | 106 mm (4.2 inches) | 90% | moderate |
| December Weather | -1°C (30°F) | 88 mm (3.5 inches) | 89% | low |