December Weather in Cwmbran, United Kingdom

Last updated: August 27, 2025

In December, the average temperature in Cwmbran, United Kingdom hovers around 6°C (43°F), with minimums dipping to a chilly -8°C (17°F) and maximums reaching a mild 13°C (56°F). Expect frequent showers, as precipitation averages 108 mm (4.3 in) over 16 days, accompanied by high humidity levels of 89%. Prepare for a cool, damp month that will keep you cozy indoors!

December Temperature in Cwmbran

In December in Cwmbran, the average temperature is 6°C (43°F). Maximum temperatures can reach 13°C (56°F), while minimums can drop as low as -8°C (17°F). Be sure to pack warm clothing if you plan to visit during this chilly month.

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

The chart illustrates December temperature patterns in Cwmbran, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cwmbran, December typically has an average temperature of 6°C (43°F), with highs reaching up to 13°C (56°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec414244485359636157524643
Data source: Temperature data for Cwmbran generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Cwmbran

In Cwmbran in December, the total precipitation amount is 108 mm (4.3 in), which falls over the course of 16 days.

December Precipitation Trends in Cwmbran

The chart displays monthly precipitation patterns in Cwmbran, 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 Cwmbran, December typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec61848858798273846311184108
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Cwmbran

In Cwmbran 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.

December Average Humidity in Cwmbran

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

In Cwmbran 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 Cwmbran.

Maximum UV Index Levels in Cwmbran for December

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

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

This table compares monthly weather conditions in Cwmbran, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)61 mm (2.4 inches)88%low
February Weather6°C (42°F)84 mm (3.3 inches)88%low
March Weather7°C (44°F)88 mm (3.5 inches)86%moderate
April Weather9°C (48°F)58 mm (2.3 inches)84%high
May Weather12°C (53°F)79 mm (3.1 inches)80%high
June Weather15°C (60°F)82 mm (3.2 inches)80%very high
July Weather17°C (63°F)73 mm (2.9 inches)70%very high
August Weather16°C (61°F)84 mm (3.3 inches)73%high
September Weather14°C (57°F)63 mm (2.5 inches)79%high
October Weather11°C (52°F)111 mm (4.4 inches)89%moderate
November Weather8°C (46°F)84 mm (3.3 inches)90%low
December Weather6°C (43°F)108 mm (4.3 inches)89%low

Compare Cwmbran's Climate with Cities Worldwide