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December Weather in Bristol, United States

Last updated: June 24, 2025

In December, the average temperature in Bristol, United States hovers around -3°C (26°F). While it can dip as low as -27°C (-17°F), the mercury may rise to a maximum of 15°C (59°F). Expect occasional precipitation, with an average of 79 mm (3.1 in) falling over 14 days, accompanied by high humidity levels averaging 89%.

December Temperature in Bristol

In December in Bristol, the average temperature is -3°C (26°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -27°C (-17°F). Be prepared for chilly days and potential cold snaps if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Bristol, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bristol, December typically has an average temperature of -3°C (26°F), with highs reaching up to 15°C (59°F) and lows dropping to around -27°C (-17°F).
JanFebMarAprMayJunJulAugSepOctNovDec202330435665706861503526
Data source: Temperature data for Bristol 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 Bristol

In Bristol in December, the total precipitation amount is 79 mm (3.1 in) over a span of 14 days.

December Precipitation Trends in Bristol

The chart displays monthly precipitation patterns in Bristol, 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 Bristol, December typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7979731099299110926714210479
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Bristol

In Bristol in December, humidity is 89%. With an average temperature of -3°C (26°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring layered clothing to stay warm as you explore.

December Average Humidity in Bristol

This chart illustrates the average monthly humidity levels in Bristol, 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 Bristol is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Bristol

In Bristol in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Bristol, you can visit Hourly UV Index in Bristol.

Maximum UV Index Levels in Bristol for December

The chart shows the monthly maximum UV Index (UVI) for Bristol 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 Bristol typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Bristol 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 Bristol Compares to Other Months

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

This table compares monthly weather conditions in Bristol, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)79 mm (3.1 inches)93%low
February Weather-5°C (23°F)79 mm (3.1 inches)92%moderate
March Weather-1°C (31°F)73 mm (2.9 inches)86%moderate
April Weather6°C (43°F)108 mm (4.3 inches)85%very high
May Weather13°C (56°F)92 mm (3.6 inches)80%very high
June Weather18°C (65°F)99 mm (3.9 inches)74%very high
July Weather21°C (70°F)110 mm (4.3 inches)76%very high
August Weather20°C (69°F)92 mm (3.6 inches)75%very high
September Weather16°C (61°F)67 mm (2.6 inches)78%high
October Weather10°C (50°F)142 mm (5.6 inches)86%moderate
November Weather2°C (35°F)103 mm (4.1 inches)88%moderate
December Weather-3°C (26°F)79 mm (3.1 inches)89%low

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