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December Weather in Cynwyd, United Kingdom

Last updated: August 27, 2025

In December, the average temperature in Cynwyd, United Kingdom hovers around 5°C (41°F). Be prepared for chilly days, as temperatures can dip as low as -8°C (18°F), while occasionally reaching a maximum of 12°C (54°F). Rain is quite common, with approximately 126 mm (5.0 in) falling over about 18 days. The air can feel quite damp, with an average humidity level of 89%.

December Temperature in Cynwyd

In December in Cynwyd, the average temperature is 5°C (41°F). The maximum can reach 12°C (54°F), while the minimum can drop as low as -8°C (18°F). It's advisable to pack warm clothing and be prepared for chilly weather if you're traveling during this time.

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

The chart illustrates December temperature patterns in Cynwyd, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cynwyd, December typically has an average temperature of 5°C (41°F), with highs reaching up to 12°C (54°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec394042465157595855504441
Data source: Temperature data for Cynwyd 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 Cynwyd

In Cynwyd in December, the precipitation amount is 126 mm (5.0 in) spread over 18 days.

December Precipitation Trends in Cynwyd

The chart displays monthly precipitation patterns in Cynwyd, 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 Cynwyd, December typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec791111126377998911510011692126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cynwyd

In Cynwyd 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 Cynwyd

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

In Cynwyd 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 Cynwyd.

Maximum UV Index Levels in Cynwyd for December

The chart shows the monthly maximum UV Index (UVI) for Cynwyd 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 Cynwyd typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Cynwyd 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 Cynwyd Compares to Other Months

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

This table compares monthly weather conditions in Cynwyd, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)79 mm (3.1 inches)89%low
February Weather5°C (41°F)111 mm (4.4 inches)88%low
March Weather6°C (42°F)112 mm (4.4 inches)86%moderate
April Weather8°C (46°F)63 mm (2.5 inches)84%moderate
May Weather10°C (51°F)77 mm (3.0 inches)79%high
June Weather14°C (57°F)99 mm (3.9 inches)81%very high
July Weather15°C (60°F)89 mm (3.5 inches)78%very high
August Weather15°C (59°F)115 mm (4.5 inches)79%high
September Weather13°C (55°F)100 mm (3.9 inches)85%moderate
October Weather10°C (50°F)116 mm (4.6 inches)90%moderate
November Weather7°C (44°F)92 mm (3.6 inches)91%low
December Weather5°C (41°F)126 mm (5.0 inches)89%low

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