Last updated: August 27, 2025
In December, the average temperature in Longtown, United Kingdom hovers around 6°C (43°F). Expect chilly conditions, with minimums dipping to -10°C (15°F) and maximums reaching a relatively mild 13°C (56°F). Rain is also a possibility, with an average precipitation of 98 mm (3.9 in) spread over 15 days. Coupled with an average humidity of 89%, it's a month where layers are a must for comfort!
In December in Longtown, the average temperature is 6°C (43°F). The maximum can reach 13°C (56°F) and the minimum can be as low as -10°C (15°F). Be sure to pack warm clothing and prepare for chilly weather if you plan to travel during this time.
In Longtown in December, the total precipitation amount is 98 mm (3.9 in) spread over 15 days.
In Longtown in December, humidity is 89%. With an average temperature of 6°C (43°F), this humidity feels like a chilly, damp embrace that can make outdoor activities uncomfortable and energy-draining, often leading travelers to seek shelter indoors or dress in layers to cope with the cold and moist air.
In Longtown 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 Longtown.
UV Risk Categories
Weather in Longtown varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Longtown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 56 mm (2.2 inches) | 88% | low |
| February Weather | 5°C (42°F) | 77 mm (3.0 inches) | 88% | low |
| March Weather | 6°C (44°F) | 83 mm (3.3 inches) | 86% | moderate |
| April Weather | 8°C (47°F) | 53 mm (2.1 inches) | 84% | high |
| May Weather | 11°C (53°F) | 76 mm (3.0 inches) | 80% | high |
| June Weather | 15°C (59°F) | 78 mm (3.1 inches) | 80% | very high |
| July Weather | 17°C (62°F) | 64 mm (2.5 inches) | 70% | very high |
| August Weather | 16°C (61°F) | 72 mm (2.8 inches) | 73% | high |
| September Weather | 14°C (57°F) | 58 mm (2.3 inches) | 79% | high |
| October Weather | 11°C (51°F) | 97 mm (3.8 inches) | 89% | moderate |
| November Weather | 7°C (45°F) | 79 mm (3.1 inches) | 90% | low |
| December Weather | 6°C (43°F) | 98 mm (3.9 inches) | 89% | low |