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December Weather in Radyr, United Kingdom

Last updated: August 27, 2025

In December, the average temperature in Radyr, United Kingdom hovers around 7°C (45°F), with minimums reaching -4°C (26°F) and maximums peaking at 13°C (56°F). Be prepared for wet weather, as the area experiences approximately 130 mm (5.1 in) of precipitation over 17 days. With an average humidity of 89%, it's a good idea to pack accordingly for a cozy stay!

December Temperature in Radyr

In December in Radyr, the average temperature is 7°C (45°F). The maximum can reach 13°C (56°F), and the minimum can be as low as -4°C (26°F). Travelers should prepare for chilly weather and pack accordingly to enjoy their trip comfortably.

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

The chart illustrates December temperature patterns in Radyr, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Radyr, December typically has an average temperature of 7°C (45°F), with highs reaching up to 13°C (56°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec424345485460636258534745
Data source: Temperature data for Radyr 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 Radyr

In Radyr in December, the total precipitation amount is 130 mm (5.1 in) over a span of 17 days.

December Precipitation Trends in Radyr

The chart displays monthly precipitation patterns in Radyr, 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 Radyr, December typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec751019857798485978113599130
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Radyr

In Radyr in December, humidity is 89%. With an average temperature of 7°C (45°F), this humidity feels like stepping into a damp cloud, making traveling quite uncomfortable as the moisture clings to your skin and clothes, turning even mild activity into a sweaty ordeal.

December Average Humidity in Radyr

This chart illustrates the average monthly humidity levels in Radyr, 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 Radyr is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Radyr

In Radyr 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 Radyr.

Maximum UV Index Levels in Radyr for December

The chart shows the monthly maximum UV Index (UVI) for Radyr 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 Radyr typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Radyr 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 Radyr Compares to Other Months

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

This table compares monthly weather conditions in Radyr, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)75 mm (3.0 inches)88%low
February Weather6°C (44°F)101 mm (4.0 inches)88%low
March Weather7°C (45°F)97 mm (3.8 inches)86%moderate
April Weather9°C (49°F)57 mm (2.2 inches)84%high
May Weather12°C (54°F)79 mm (3.1 inches)80%high
June Weather15°C (60°F)84 mm (3.3 inches)80%very high
July Weather17°C (63°F)85 mm (3.3 inches)70%very high
August Weather17°C (62°F)97 mm (3.8 inches)73%high
September Weather15°C (59°F)81 mm (3.2 inches)79%high
October Weather12°C (54°F)135 mm (5.3 inches)89%moderate
November Weather9°C (48°F)99 mm (3.9 inches)90%low
December Weather7°C (45°F)130 mm (5.1 inches)89%low

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