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December Weather in Somerset, United States

Last updated: June 24, 2025

In December, the average temperature in Somerset, United States hovers around 6°C (44°F). Expect a chilly environment as temperatures can dip to a minimum of -11°C (12°F), while reaching a maximum of 22°C (73°F). Prepare for some wet days, with an average precipitation of 139 mm (5.5 in) over 11 days. Don't forget, the air tends to feel quite humid, with an average humidity level of 88%.

December Temperature in Somerset

In December in Somerset, the average temperature is 6°C (44°F), with maximums reaching 22°C (73°F) and minimums plummeting to as low as -11°C (12°F). Overall, this makes Somerset a destination where travelers should prepare for a wide range of temperatures.

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

The chart illustrates December temperature patterns in Somerset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Somerset, December typically has an average temperature of 6°C (44°F), with highs reaching up to 22°C (73°F) and lows dropping to around -11°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec394450576874787672624743
Data source: Temperature data for Somerset 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 Somerset

In Somerset in December, the precipitation amount is 139 mm (5.5 in) occurring over a span of 11 days.

December Precipitation Trends in Somerset

The chart displays monthly precipitation patterns in Somerset, 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 Somerset, December typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9918514913912814210412011812178139
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Somerset

In Somerset in December humidity is 88%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less inviting and requiring warm, layered clothing to stay comfortable while exploring.

December Average Humidity in Somerset

This chart illustrates the average monthly humidity levels in Somerset, 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 Somerset is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Somerset

In Somerset 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 Somerset, you can check the information here.

Maximum UV Index Levels in Somerset for December

The chart shows the monthly maximum UV Index (UVI) for Somerset 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 Somerset typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679111111109753
Data source: Somerset 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 Somerset Compares to Other Months

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

This table compares monthly weather conditions in Somerset, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)99 mm (3.9 inches)88%moderate
February Weather7°C (44°F)185 mm (7.3 inches)88%high
March Weather10°C (51°F)149 mm (5.9 inches)87%high
April Weather14°C (58°F)139 mm (5.5 inches)84%very high
May Weather20°C (68°F)128 mm (5.0 inches)84%extreme
June Weather23°C (74°F)142 mm (5.6 inches)83%extreme
July Weather26°C (79°F)104 mm (4.1 inches)79%extreme
August Weather25°C (77°F)120 mm (4.7 inches)66%very high
September Weather22°C (72°F)117 mm (4.6 inches)67%very high
October Weather17°C (62°F)121 mm (4.8 inches)76%high
November Weather9°C (48°F)78 mm (3.1 inches)89%moderate
December Weather6°C (44°F)139 mm (5.5 inches)88%moderate

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