Last updated: August 27, 2025
In December, the average temperature in Castleside, United Kingdom hovers around 4°C (40°F). Expect chilly days with temperatures dipping to a minimum of -7°C (21°F) and occasionally peaking at 12°C (55°F). This month sees 83 mm (3.2 inches) of precipitation spread over 14 days, contributing to a notably high average humidity of 88%. Stay prepared for a damp and cool experience!
In December in Castleside, the average temperature is 4°C (40°F). Maximums can reach 12°C (55°F) and minimums can be as low as -7°C (21°F). Travelers should be prepared for chilly weather and pack accordingly.
In Castleside in December, the precipitation amount is 83 mm (3.2 in) over the course of 14 days.
In Castleside in December, humidity is 88%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less enjoyable and prompting you to seek cozy indoor activities instead.
In Castleside 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 Castleside.
UV Risk Categories
Weather in Castleside varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castleside, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 61 mm (2.4 inches) | 89% | low |
| February Weather | 4°C (39°F) | 97 mm (3.8 inches) | 87% | low |
| March Weather | 5°C (42°F) | 87 mm (3.4 inches) | 85% | moderate |
| April Weather | 7°C (45°F) | 43 mm (1.7 inches) | 84% | moderate |
| May Weather | 10°C (51°F) | 68 mm (2.7 inches) | 83% | high |
| June Weather | 13°C (56°F) | 93 mm (3.6 inches) | 85% | very high |
| July Weather | 15°C (59°F) | 88 mm (3.5 inches) | 83% | very high |
| August Weather | 15°C (58°F) | 96 mm (3.8 inches) | 82% | high |
| September Weather | 12°C (54°F) | 75 mm (2.9 inches) | 87% | moderate |
| October Weather | 9°C (49°F) | 99 mm (3.9 inches) | 89% | moderate |
| November Weather | 6°C (43°F) | 72 mm (2.8 inches) | 90% | low |
| December Weather | 4°C (40°F) | 83 mm (3.2 inches) | 88% | low |