Last updated: August 27, 2025
In December, the average temperature in Llanfynydd, United Kingdom hovers around 6°C (43°F). Expect chilly nights with minimums dipping to -4°C (26°F), while daytime can bring a mild maximum of 12°C (55°F). Prepare for wet weather, as the region receives about 166 mm (6.5 in) of precipitation over 20 days, coupled with a high average humidity of 89%.
In December in Llanfynydd, the average temperature is 6°C (43°F), with maximums reaching up to 12°C (55°F) and minimums dropping as low as -4°C (26°F). This weather makes it essential to pack layers and prepare for chilly conditions when traveling to Llanfynydd during this time.
In Llanfynydd in December, the precipitation amount is 166 mm (6.5 in) over the course of 20 days.
In Llanfynydd 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 Llanfynydd 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 Llanfynydd.
UV Risk Categories
Weather in Llanfynydd varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Llanfynydd, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 95 mm (3.7 inches) | 88% | low |
| February Weather | 5°C (42°F) | 140 mm (5.5 inches) | 88% | low |
| March Weather | 6°C (44°F) | 125 mm (4.9 inches) | 86% | moderate |
| April Weather | 8°C (48°F) | 66 mm (2.6 inches) | 84% | high |
| May Weather | 11°C (52°F) | 99 mm (3.9 inches) | 80% | high |
| June Weather | 14°C (58°F) | 103 mm (4.1 inches) | 80% | very high |
| July Weather | 16°C (61°F) | 101 mm (4.0 inches) | 70% | very high |
| August Weather | 15°C (60°F) | 133 mm (5.2 inches) | 73% | high |
| September Weather | 13°C (56°F) | 110 mm (4.3 inches) | 79% | high |
| October Weather | 10°C (51°F) | 155 mm (6.1 inches) | 89% | moderate |
| November Weather | 7°C (46°F) | 132 mm (5.2 inches) | 90% | low |
| December Weather | 6°C (43°F) | 166 mm (6.5 inches) | 89% | low |