Last updated: August 27, 2025
In December, the average temperature in Deia, Romania hovers around -2°C (29°F). Temperatures can drop to a chilling -19°C (-2°F) at their lowest, while they may reach a mild 11°C (52°F) at their peak. Expect approximately 63 mm (2.5 in) of precipitation spread over 13 days, accompanied by a notable average humidity of 90%. Stay warm and ready for a damp month!
In December in Deia, the average temperature is -2°C (29°F), with maximums reaching 11°C (52°F) and minimums dropping as low as -19°C (-2°F). Travelers should be prepared for a wide range of temperatures and dress accordingly to enjoy their time in this chilly destination.
In Deia in December, the precipitation amount is 63 mm (2.5 in) spread over 13 days.
In Deia in December, humidity is 90%. With an average temperature of -2°C (29°F), this humidity feels like an icy breath enveloping you, making every step outdoors feel even colder and more biting, while also creating a heavy, wet atmosphere that can dampen your spirits for traveling.
In Deia 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 Deia, you can visit Hourly UV Index in Deia.
UV Risk Categories
Weather in Deia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Deia, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 29 mm (1.1 inches) | 92% | low |
| February Weather | -2°C (28°F) | 55 mm (2.2 inches) | 88% | moderate |
| March Weather | 0°C (33°F) | 65 mm (2.6 inches) | 86% | moderate |
| April Weather | 6°C (42°F) | 61 mm (2.4 inches) | 79% | high |
| May Weather | 10°C (51°F) | 131 mm (5.2 inches) | 73% | very high |
| June Weather | 15°C (59°F) | 170 mm (6.7 inches) | 73% | very high |
| July Weather | 16°C (61°F) | 127 mm (5.0 inches) | 68% | very high |
| August Weather | 17°C (62°F) | 96 mm (3.8 inches) | 56% | very high |
| September Weather | 12°C (54°F) | 60 mm (2.4 inches) | 62% | high |
| October Weather | 7°C (45°F) | 37 mm (1.5 inches) | 80% | moderate |
| November Weather | 3°C (37°F) | 32 mm (1.3 inches) | 89% | moderate |
| December Weather | -2°C (29°F) | 63 mm (2.5 inches) | 90% | low |