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December Weather in Saint Andrew, Guernsey

Last updated: August 23, 2025

In December, the average temperature in Saint Andrew, Guernsey hovers around 11°C (51°F), with daily fluctuations ranging from a chilly 5°C (41°F) to a mild 14°C (58°F). Be prepared for wet weather, as precipitation averages 163 mm (6.4 in) spread over 21 days, contributing to a high humidity level of 90%. Don't forget your umbrella!

December Temperature in Saint Andrew

In December in Saint Andrew, the average temperature is 11°C (51°F). The maximum can reach 14°C (58°F), while the minimum can be as low as 5°C (41°F). It's a mild time to visit, making it ideal for outdoor activities and exploring the area comfortably.

December Weather in Saint Andrew: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint Andrew, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Andrew, December typically has an average temperature of 11°C (51°F), with highs reaching up to 14°C (58°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec484848505458616362595451
Data source: Temperature data for Saint Andrew 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 Saint Andrew

In Saint Andrew in December, the precipitation amount is 163 mm (6.4 in), occurring over the course of 21 days.

December Precipitation Trends in Saint Andrew

The chart displays monthly precipitation patterns in Saint Andrew, 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 Saint Andrew, December typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec948673345559375063144126163
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint Andrew

In Saint Andrew in December, humidity is 90%. With an average temperature of 11°C (51°F), this humidity feels like a damp blanket wrapping around you, making traveling uncomfortable and sticky, as every step leaves you feeling sluggish and clinging to the air.

December Average Humidity in Saint Andrew

This chart illustrates the average monthly humidity levels in Saint Andrew, 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 Saint Andrew is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%85%84%81%77%63%71%76%89%90%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint Andrew

In Saint Andrew 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 Saint Andrew.

Maximum UV Index Levels in Saint Andrew for December

The chart shows the monthly maximum UV Index (UVI) for Saint Andrew 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 Saint Andrew typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679876421
Data source: Saint Andrew 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 Saint Andrew Compares to Other Months

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

This table compares monthly weather conditions in Saint Andrew, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)94 mm (3.7 inches)89%low
February Weather9°C (48°F)86 mm (3.4 inches)88%moderate
March Weather9°C (49°F)73 mm (2.9 inches)85%moderate
April Weather10°C (50°F)34 mm (1.3 inches)84%high
May Weather12°C (54°F)55 mm (2.2 inches)81%high
June Weather14°C (58°F)59 mm (2.3 inches)77%very high
July Weather16°C (62°F)37 mm (1.5 inches)63%very high
August Weather17°C (63°F)50 mm (2.0 inches)71%high
September Weather17°C (62°F)63 mm (2.5 inches)76%high
October Weather15°C (59°F)144 mm (5.7 inches)89%moderate
November Weather12°C (54°F)126 mm (5.0 inches)90%low
December Weather11°C (51°F)163 mm (6.4 inches)90%low

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