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December Weather in St Mary's Bay, United Kingdom

Last updated: August 27, 2025

In St Mary's Bay, United Kingdom, the average temperature in December hovers around 8°C (46°F), with a minimum of 0°C (31°F) and a comfortable maximum of 14°C (58°F). Expect a fair share of rain, with 119 mm (4.7 in) of precipitation spread over 17 days, contributing to an average humidity level of a brisk 92%. Be prepared for moist and chilly conditions!

December Temperature in St Mary's Bay

In December in St Mary's Bay, the average temperature is 8°C (46°F). The maximum can reach 14°C (58°F), while the minimum can drop to as low as 0°C (31°F). It's advisable to dress in layers and be prepared for chilly conditions if you plan to travel during this time.

December Weather in St Mary's Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in St Mary's Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Mary's Bay, December typically has an average temperature of 8°C (46°F), with highs reaching up to 14°C (58°F) and lows dropping to around 0°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec434446495460646461564946
Data source: Temperature data for St Mary's Bay 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 St Mary's Bay

In St Mary's Bay in December, the precipitation amount is 119 mm (4.7 in) spread across 17 days.

December Precipitation Trends in St Mary's Bay

The chart displays monthly precipitation patterns in St Mary's Bay, 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 St Mary's Bay, December typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec68695929615648645310383119
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in St Mary's Bay

In St Mary's Bay in December, humidity is 92%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that settles deep into your bones, making outdoor adventures uncomfortable and necessitating extra layers to stay warm while you explore.

December Average Humidity in St Mary's Bay

This chart illustrates the average monthly humidity levels in St Mary's Bay, 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 St Mary's Bay is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in St Mary's Bay

In St Mary's Bay 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 St Mary's Bay.

Maximum UV Index Levels in St Mary's Bay for December

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

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

This table compares monthly weather conditions in St Mary's Bay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)68 mm (2.7 inches)91%low
February Weather7°C (44°F)69 mm (2.7 inches)89%low
March Weather8°C (46°F)59 mm (2.3 inches)86%moderate
April Weather10°C (49°F)29 mm (1.1 inches)85%moderate
May Weather12°C (55°F)61 mm (2.4 inches)82%high
June Weather16°C (61°F)56 mm (2.2 inches)81%very high
July Weather18°C (65°F)48 mm (1.9 inches)76%very high
August Weather18°C (65°F)64 mm (2.5 inches)73%high
September Weather16°C (61°F)53 mm (2.1 inches)80%moderate
October Weather13°C (56°F)103 mm (4.0 inches)89%moderate
November Weather10°C (49°F)83 mm (3.3 inches)92%low
December Weather8°C (46°F)119 mm (4.7 inches)92%low

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