December Weather in Guernsey, United States

Last updated: June 24, 2025

In Guernsey, United States, the average temperature in December hovers around 1°C (33°F). Expect a wide range, with minimums dipping to -27°C (-16°F) and maximums soaring to 22°C (72°F). During this month, precipitation averages around 17 mm (0.7 in) over 4 days, contributing to an average humidity level of 75%. Stay prepared for the chilly yet dynamic weather!

December Temperature in Guernsey

In December in Guernsey, the average temperature is 1°C (33°F). The maximum can reach 22°C (72°F) and the minimum can be as low as -27°C (-16°F). Be prepared for a wide range of temperatures when traveling to Guernsey in December.

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

The chart illustrates December temperature patterns in Guernsey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guernsey, December typically has an average temperature of 1°C (33°F), with highs reaching up to 22°C (72°F) and lows dropping to around -27°C (-16°F).

Data source: Temperature data for Guernsey generated using information from the Copernicus Climate Change Service.

December Precipitation in Guernsey

In Guernsey in December, the precipitation amount is 17 mm (0.7 in) over a span of 4 days.

December Precipitation Trends in Guernsey

The chart displays monthly precipitation patterns in Guernsey, 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 Guernsey, December typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Guernsey

In Guernsey in December, humidity is 75%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill that cuts through clothing, making outdoor activities uncomfortable and necessitating extra layers for warmth.

December Average Humidity in Guernsey

This chart illustrates the average monthly humidity levels in Guernsey, 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 Guernsey is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Guernsey

In Guernsey in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Guernsey, you can check the information here.

Maximum UV Index Levels in Guernsey for December

The chart shows the monthly maximum UV Index (UVI) for Guernsey 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 Guernsey typically reaches 3, which falls under the moderate exposure category.

Data source: Guernsey 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 Guernsey Compares to Other Months

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

This table compares monthly weather conditions in Guernsey, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	12 mm (0.5 inches)	73%	moderate
February Weather	-2°C (29°F)	23 mm (0.9 inches)	78%	moderate
March Weather	4°C (39°F)	50 mm (2.0 inches)	64%	high
April Weather	8°C (46°F)	45 mm (1.8 inches)	66%	very high
May Weather	13°C (55°F)	85 mm (3.3 inches)	74%	very high
June Weather	21°C (70°F)	37 mm (1.5 inches)	84%	extreme
July Weather	25°C (77°F)	27 mm (1.1 inches)	85%	extreme
August Weather	23°C (74°F)	16 mm (0.6 inches)	85%	very high
September Weather	19°C (66°F)	24 mm (0.9 inches)	76%	very high
October Weather	8°C (47°F)	33 mm (1.3 inches)	71%	high
November Weather	4°C (40°F)	17 mm (0.7 inches)	73%	moderate
December Weather	1°C (33°F)	17 mm (0.7 inches)	75%	moderate