Last updated: August 27, 2025
In December, the average temperature in Castle Douglas, United Kingdom hovers around 5°C (42°F). However, be prepared for a temperature range that can dip as low as -6°C (21°F) and reach a balmy 12°C (54°F). During this month, you can expect about 126 mm (5.0 in) of precipitation over 17 days, coupled with an average humidity level of 89%. Bundle up and stay dry!
In December in Castle Douglas, the average temperature is 5°C (42°F). The maximum can reach 12°C (54°F), while the minimum can drop as low as -6°C (21°F). Be sure to pack warm clothing and prepare for chilly weather when traveling to Castle Douglas this month.
In Castle Douglas in December, the precipitation amount is 126 mm (5.0 in) over a duration of 17 days.
In Castle Douglas in December humidity is 89%. With an average temperature of 5°C (42°F), this humidity feels like a chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while exploring.
In Castle Douglas in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Castle Douglas.
UV Risk Categories
Weather in Castle Douglas varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castle Douglas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 84 mm (3.3 inches) | 90% | low |
| February Weather | 5°C (41°F) | 155 mm (6.1 inches) | 88% | low |
| March Weather | 6°C (43°F) | 107 mm (4.2 inches) | 86% | moderate |
| April Weather | 8°C (46°F) | 50 mm (1.9 inches) | 85% | moderate |
| May Weather | 11°C (52°F) | 70 mm (2.8 inches) | 80% | high |
| June Weather | 14°C (57°F) | 104 mm (4.1 inches) | 83% | very high |
| July Weather | 15°C (60°F) | 102 mm (4.0 inches) | 82% | very high |
| August Weather | 15°C (59°F) | 137 mm (5.4 inches) | 82% | high |
| September Weather | 13°C (55°F) | 101 mm (4.0 inches) | 88% | moderate |
| October Weather | 10°C (50°F) | 148 mm (5.8 inches) | 90% | moderate |
| November Weather | 7°C (45°F) | 130 mm (5.1 inches) | 92% | low |
| December Weather | 5°C (42°F) | 126 mm (5.0 inches) | 89% | low |