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December Weather in Rhayader, United Kingdom

Last updated: August 27, 2025

In Rhayader, United Kingdom during December, the average temperature is a chilly 5°C (41°F). Expect minimum temperatures to dip to -8°C (17°F) and a maximum of 12°C (53°F). Rainfall is significant, with 129 mm (5.1 in) spread over 18 days. Coupled with an average humidity of 89%, it’s a month where layers and waterproof gear are essential!

December Temperature in Rhayader

In December in Rhayader, the average temperature is 5°C (41°F), with a maximum that can reach 12°C (53°F) and a minimum that can drop to -8°C (17°F). Be sure to dress warmly and be prepared for chilly conditions if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Rhayader, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rhayader, December typically has an average temperature of 5°C (41°F), with highs reaching up to 12°C (53°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec394042455157595854494441
Data source: Temperature data for Rhayader 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 Rhayader

In Rhayader in December, the total precipitation amount is 129 mm (5.1 in) spread over 18 days.

December Precipitation Trends in Rhayader

The chart displays monthly precipitation patterns in Rhayader, 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 Rhayader, December typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec791151156088948210685123104129
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rhayader

In Rhayader 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.

December Average Humidity in Rhayader

This chart illustrates the average monthly humidity levels in Rhayader, 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 Rhayader 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 Rhayader

In Rhayader 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 Rhayader.

Maximum UV Index Levels in Rhayader for December

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

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

This table compares monthly weather conditions in Rhayader, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)79 mm (3.1 inches)89%low
February Weather4°C (40°F)115 mm (4.5 inches)88%low
March Weather5°C (42°F)115 mm (4.5 inches)86%moderate
April Weather7°C (46°F)60 mm (2.4 inches)84%high
May Weather10°C (51°F)88 mm (3.5 inches)79%high
June Weather14°C (57°F)94 mm (3.7 inches)81%very high
July Weather15°C (60°F)82 mm (3.2 inches)78%very high
August Weather14°C (58°F)106 mm (4.2 inches)79%high
September Weather12°C (55°F)85 mm (3.3 inches)85%high
October Weather10°C (50°F)123 mm (4.8 inches)90%moderate
November Weather6°C (44°F)104 mm (4.1 inches)91%low
December Weather5°C (41°F)129 mm (5.1 inches)89%low

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