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December Weather in Brunswick, United States

Last updated: June 24, 2025

In December, the average temperature in Brunswick, United States hovers around 3°C (37°F). Expect a wide range of temperatures, with a minimum dipping to -19°C (-2°F) and a maximum soaring to 24°C (75°F). Precipitation is moderate, with an average of 37 mm (1.4 in) spread over 5 days, and the average humidity sits at a high 86%. Prepare accordingly to experience the full spectrum of weather!

December Temperature in Brunswick

In December in Brunswick, the average temperature is 3°C (37°F). The maximum can reach 24°C (75°F), while the minimum can drop to as low as -19°C (-2°F). Prepare for a wide range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Brunswick, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brunswick, December typically has an average temperature of 3°C (37°F), with highs reaching up to 24°C (75°F) and lows dropping to around -19°C (-2°F).
JanFebMarAprMayJunJulAugSepOctNovDec303245546676797671574337
Data source: Temperature data for Brunswick 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 Brunswick

In Brunswick in December, the precipitation amount is 37 mm (1.4 in) spread over a duration of 5 days.

December Precipitation Trends in Brunswick

The chart displays monthly precipitation patterns in Brunswick, 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 Brunswick, December typically receives around 37 mm (1.4 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec62511159222014311499781214937
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Brunswick

In Brunswick in December humidity is 86%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in Brunswick

This chart illustrates the average monthly humidity levels in Brunswick, 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 Brunswick is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Brunswick

In Brunswick 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 Brunswick, you can check the information here.

Maximum UV Index Levels in Brunswick for December

The chart shows the monthly maximum UV Index (UVI) for Brunswick 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 Brunswick typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Brunswick 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 Brunswick Compares to Other Months

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

This table compares monthly weather conditions in Brunswick, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)62 mm (2.4 inches)80%moderate
February Weather0°C (32°F)51 mm (2.0 inches)78%moderate
March Weather7°C (46°F)115 mm (4.5 inches)75%high
April Weather12°C (54°F)92 mm (3.6 inches)77%very high
May Weather19°C (66°F)220 mm (8.6 inches)82%very high
June Weather25°C (76°F)143 mm (5.6 inches)83%extreme
July Weather26°C (80°F)114 mm (4.5 inches)81%extreme
August Weather24°C (76°F)99 mm (3.9 inches)78%very high
September Weather22°C (72°F)78 mm (3.1 inches)72%very high
October Weather14°C (57°F)121 mm (4.7 inches)72%high
November Weather6°C (44°F)49 mm (1.9 inches)84%moderate
December Weather3°C (37°F)37 mm (1.4 inches)86%moderate

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