Last updated: August 27, 2025
In December, the average temperature in Newcastleton, United Kingdom hovers around 4°C (40°F). Expect chilly days with a minimum temperature dipping to -7°C (19°F) and a maximum reaching 12°C (53°F). Prepare for wet weather too, as the region sees about 91 mm (3.6 in) of precipitation over 16 days, coupled with a notably high average humidity of 89%.
In December in Newcastleton, the average temperature is 4°C (40°F). Maximum temperatures can reach 12°C (53°F), while minimums can drop as low as -7°C (19°F). Travelers should be prepared for chilly weather and pack accordingly.
In Newcastleton in December, the total precipitation amount is 91 mm (3.6 in) spread over 16 days.
In Newcastleton in December humidity is 89%. With an average temperature of 4°C (40°F), this humidity feels like a chilling blanket enveloping you, making travel uncomfortable and damp, as the cold penetrates through your clothes and the air feels heavy and clinging.
In Newcastleton 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 Newcastleton.
UV Risk Categories
Weather in Newcastleton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Newcastleton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 67 mm (2.6 inches) | 90% | low |
| February Weather | 4°C (39°F) | 114 mm (4.5 inches) | 88% | low |
| March Weather | 5°C (42°F) | 101 mm (4.0 inches) | 86% | moderate |
| April Weather | 7°C (45°F) | 40 mm (1.6 inches) | 85% | moderate |
| May Weather | 10°C (51°F) | 62 mm (2.5 inches) | 80% | high |
| June Weather | 13°C (56°F) | 95 mm (3.8 inches) | 83% | very high |
| July Weather | 15°C (59°F) | 93 mm (3.7 inches) | 82% | very high |
| August Weather | 14°C (58°F) | 116 mm (4.6 inches) | 82% | high |
| September Weather | 12°C (54°F) | 76 mm (3.0 inches) | 88% | moderate |
| October Weather | 9°C (49°F) | 120 mm (4.7 inches) | 90% | moderate |
| November Weather | 6°C (43°F) | 83 mm (3.3 inches) | 92% | low |
| December Weather | 4°C (40°F) | 91 mm (3.6 inches) | 89% | low |