Last updated: August 27, 2025
In December, the average temperature in Caersws, United Kingdom hovers around 5°C (41°F). Expect chilly days, with minimum temperatures dipping to -9°C (16°F) and occasional highs reaching 12°C (54°F). This month also brings considerable moisture, with an average of 132 mm (5.2 in) of precipitation spread over 19 days. The average humidity is quite high at 89%, creating a cool and damp atmosphere.
In December in Caersws, the average temperature is 5°C (41°F). The maximum can reach 12°C (54°F), while the minimum can drop as low as -9°C (16°F). It's advisable to pack warm clothing to stay comfortable during your travels.
In Caersws in December, the precipitation amount is 132 mm (5.2 in) over the course of 19 days.
In Caersws in December humidity is 89%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less enjoyable and encouraging travelers to seek warmth indoors or layer up to stay comfortable while venturing out.
In Caersws 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 Caersws.
UV Risk Categories
Weather in Caersws varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Caersws, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 82 mm (3.2 inches) | 89% | low |
| February Weather | 5°C (40°F) | 118 mm (4.6 inches) | 88% | low |
| March Weather | 5°C (42°F) | 118 mm (4.6 inches) | 86% | moderate |
| April Weather | 7°C (46°F) | 61 mm (2.4 inches) | 84% | high |
| May Weather | 10°C (51°F) | 84 mm (3.3 inches) | 79% | high |
| June Weather | 14°C (57°F) | 94 mm (3.7 inches) | 81% | very high |
| July Weather | 15°C (60°F) | 82 mm (3.2 inches) | 78% | very high |
| August Weather | 15°C (58°F) | 111 mm (4.4 inches) | 79% | high |
| September Weather | 12°C (55°F) | 89 mm (3.5 inches) | 85% | high |
| October Weather | 10°C (50°F) | 122 mm (4.8 inches) | 90% | moderate |
| November Weather | 7°C (44°F) | 103 mm (4.1 inches) | 91% | low |
| December Weather | 5°C (41°F) | 132 mm (5.2 inches) | 89% | low |