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December Weather in Tregynon, United Kingdom

Last updated: August 27, 2025

In December, the average temperature in Tregynon, United Kingdom hovers around 5°C (42°F), with a minimum dip to -8°C (17°F) and a pleasant high of 13°C (55°F). Expect 108 mm (4.2 in) of precipitation spread across 18 days, contributing to an average humidity level of 89%. Cozy up as you experience the chill and charm of this season!

December Temperature in Tregynon

In December in Tregynon, the average temperature is 5°C (42°F). Maximums can reach 13°C (55°F), and minimums can be as low as -8°C (17°F). Make sure to pack warm clothing and prepare for chilly weather during your visit.

December Weather in Tregynon: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Tregynon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tregynon, December typically has an average temperature of 5°C (42°F), with highs reaching up to 13°C (55°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec394142465157605955504442
Data source: Temperature data for Tregynon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Tregynon

In Tregynon in December, the precipitation amount is 108 mm (4.2 in) spread over 18 days.

December Precipitation Trends in Tregynon

The chart displays monthly precipitation patterns in Tregynon, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Tregynon, December typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec67949655768868867210287108
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tregynon

In Tregynon in December humidity is 89%. With an average temperature of 5°C (42°F), this humidity feels like a chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while exploring.

December Average Humidity in Tregynon

This chart illustrates the average monthly humidity levels in Tregynon, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Tregynon is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%85%79%81%78%79%85%90%91%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tregynon

In Tregynon 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 Tregynon.

Maximum UV Index Levels in Tregynon for December

The chart shows the monthly maximum UV Index (UVI) for Tregynon in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Tregynon typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Tregynon December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Tregynon Compares to Other Months

Weather in Tregynon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tregynon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Tregynon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)67 mm (2.7 inches)89%low
February Weather5°C (41°F)94 mm (3.7 inches)88%low
March Weather6°C (43°F)96 mm (3.8 inches)86%moderate
April Weather8°C (46°F)55 mm (2.2 inches)84%high
May Weather11°C (52°F)76 mm (3.0 inches)79%high
June Weather14°C (57°F)88 mm (3.5 inches)81%very high
July Weather16°C (61°F)68 mm (2.7 inches)78%very high
August Weather15°C (59°F)86 mm (3.4 inches)79%high
September Weather13°C (55°F)72 mm (2.8 inches)85%high
October Weather10°C (50°F)102 mm (4.0 inches)90%moderate
November Weather7°C (45°F)87 mm (3.4 inches)91%low
December Weather5°C (42°F)108 mm (4.2 inches)89%low

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