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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 1°C (33°F), with a minimum that can plummet to -19°C (-3°F) and a maximum reaching up to 18°C (65°F). Expect 113 mm (4.4 in) of precipitation spread over 13 days, coupled with a high average humidity of 85%. Prepare for a chilly yet dynamic month!

December Temperature in Somerset

In December in Somerset, the average temperature is 1°C (33°F), with maximums reaching 18°C (65°F) and minimums plummeting to -19°C (-3°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly days and warmer spells.

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 1°C (33°F), with highs reaching up to 18°C (65°F) and lows dropping to around -19°C (-3°F).
JanFebMarAprMayJunJulAugSepOctNovDec283238485966716964543933
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 113 mm (4.4 in) over the course of 13 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 113 mm (4.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8312911213015315711911212911583113
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 85%. With an average temperature of 1°C (33°F), this humidity feels like a chilling blanket wrapping around you, making outdoor exploration quite uncomfortable and potentially exhausting for travelers.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
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 Weather-2°C (28°F)83 mm (3.3 inches)86%moderate
February Weather0°C (33°F)128 mm (5.1 inches)86%moderate
March Weather3°C (38°F)112 mm (4.4 inches)86%high
April Weather9°C (48°F)130 mm (5.1 inches)84%very high
May Weather15°C (59°F)152 mm (6.0 inches)78%very high
June Weather19°C (67°F)157 mm (6.2 inches)79%very high
July Weather22°C (71°F)119 mm (4.7 inches)70%very high
August Weather21°C (70°F)112 mm (4.4 inches)59%very high
September Weather18°C (64°F)129 mm (5.1 inches)68%very high
October Weather12°C (54°F)115 mm (4.5 inches)80%high
November Weather4°C (39°F)83 mm (3.3 inches)86%moderate
December Weather1°C (33°F)113 mm (4.4 inches)85%moderate

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