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December Weather in Bath, United States

Last updated: June 24, 2025

In December, the average temperature in Bath, United States hovers around -1°C (30°F), with a minimum dipping to -23°C (-9°F) and a maximum reaching up to 15°C (60°F). Expect 121 mm (4.8 in) of precipitation spread over about 10 days, contributing to an average humidity level of 81%. Stay prepared for a chilly, wet month!

December Temperature in Bath

In December in Bath, the average temperature is -1°C (30°F), with a maximum that can reach 15°C (60°F) and a minimum that can drop as low as -23°C (-9°F). Be prepared for a wide range of temperatures when traveling to Bath during this month.

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

The chart illustrates December temperature patterns in Bath, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bath, December typically has an average temperature of -1°C (30°F), with highs reaching up to 15°C (60°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec262733445464707063534030
Data source: Temperature data for Bath 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 Bath

In Bath in December, the precipitation amount is 121 mm (4.8 in) spread over a period of 10 days.

December Precipitation Trends in Bath

The chart displays monthly precipitation patterns in Bath, 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 Bath, December typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec84857111873611107471128111121
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Bath

In Bath in December, humidity is 81%. With an average temperature of -1°C (30°F), this humidity feels like an extra layer of chill settles in, making travel uncomfortable and the cold air cling to your skin, dampening the experience with every breath.

December Average Humidity in Bath

This chart illustrates the average monthly humidity levels in Bath, 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 Bath is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%84%79%79%86%85%83%80%77%80%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Bath

In Bath 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 Bath, you can visit Hourly UV Index in Bath.

Maximum UV Index Levels in Bath for December

The chart shows the monthly maximum UV Index (UVI) for Bath 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 Bath typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Bath 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 Bath Compares to Other Months

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

This table compares monthly weather conditions in Bath, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)84 mm (3.3 inches)85%low
February Weather-3°C (27°F)85 mm (3.3 inches)86%moderate
March Weather1°C (33°F)71 mm (2.8 inches)84%moderate
April Weather7°C (44°F)118 mm (4.6 inches)79%high
May Weather12°C (54°F)73 mm (2.9 inches)79%very high
June Weather18°C (65°F)61 mm (2.4 inches)86%very high
July Weather21°C (71°F)110 mm (4.3 inches)85%very high
August Weather21°C (71°F)74 mm (2.9 inches)83%very high
September Weather17°C (64°F)71 mm (2.8 inches)80%high
October Weather12°C (53°F)128 mm (5.1 inches)77%moderate
November Weather4°C (40°F)111 mm (4.4 inches)80%moderate
December Weather-1°C (30°F)121 mm (4.8 inches)81%low

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