Last updated: August 27, 2025
In Glyn-neath, United Kingdom, the average temperature in December hovers around 6°C (43°F). Expect chilly days, with minimum temperatures dipping to -6°C (21°F) and occasional highs reaching 12°C (54°F). The month also sees 144 mm (5.7 in) of precipitation spread over 18 days, contributing to a notably high average humidity of 89%. Prepare for a wet and cool experience!
In December in Glyn-neath, the average temperature is 6°C (43°F). Maximums can reach 12°C (54°F), while minimums can drop to as low as -6°C (21°F). Be prepared for chilly conditions and pack accordingly if you plan to travel during this time.
In Glyn-neath in December, the precipitation amount is 144 mm (5.7 in) over the course of 18 days.
In Glyn-neath 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 Glyn-neath 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 Glyn-neath.
UV Risk Categories
Weather in Glyn-neath varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Glyn-neath, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 82 mm (3.2 inches) | 88% | low |
| February Weather | 5°C (42°F) | 124 mm (4.9 inches) | 88% | low |
| March Weather | 6°C (43°F) | 111 mm (4.4 inches) | 86% | moderate |
| April Weather | 8°C (47°F) | 64 mm (2.5 inches) | 84% | high |
| May Weather | 11°C (52°F) | 93 mm (3.7 inches) | 80% | high |
| June Weather | 14°C (58°F) | 91 mm (3.6 inches) | 80% | very high |
| July Weather | 16°C (61°F) | 93 mm (3.7 inches) | 70% | very high |
| August Weather | 15°C (60°F) | 114 mm (4.5 inches) | 73% | high |
| September Weather | 13°C (56°F) | 92 mm (3.6 inches) | 79% | high |
| October Weather | 10°C (51°F) | 143 mm (5.6 inches) | 89% | moderate |
| November Weather | 7°C (45°F) | 117 mm (4.6 inches) | 90% | low |
| December Weather | 6°C (43°F) | 144 mm (5.7 inches) | 89% | low |