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December Weather in Brewster, United States

Last updated: June 24, 2025

In December, the average temperature in Brewster, United States hovers around -2°C (30°F), presenting a chill that can plunge to a frigid -19°C (-1°F) at its lowest, while occasionally reaching a mild 15°C (59°F). Expect 66 mm (2.6 in) of precipitation spread over 11 days, contributing to the high average humidity of 86%.

December Temperature in Brewster

In December in Brewster, the average temperature is -2°C (30°F). Maximum temperatures can reach 15°C (59°F), while minimums can drop as low as -19°C (-1°F). Travelers should be prepared for a wide range of temperatures, from chilly highs to severe lows.

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

The chart illustrates December temperature patterns in Brewster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brewster, December typically has an average temperature of -2°C (30°F), with highs reaching up to 15°C (59°F) and lows dropping to around -19°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec282939485967747362473729
Data source: Temperature data for Brewster 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 Brewster

In Brewster in December, the precipitation amount is 66 mm (2.6 in) spread over 11 days.

December Precipitation Trends in Brewster

The chart displays monthly precipitation patterns in Brewster, 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 Brewster, December typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec745542332492421435466
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Brewster

In Brewster in December, humidity is 86%. With an average temperature of -2°C (30°F), this humidity feels like a biting chill that punctuates the air, making it essential for travelers to bundle up to stay warm and navigate the frosty environment with care.

December Average Humidity in Brewster

This chart illustrates the average monthly humidity levels in Brewster, 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 Brewster is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Brewster

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

Maximum UV Index Levels in Brewster for December

The chart shows the monthly maximum UV Index (UVI) for Brewster 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 Brewster typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245689997532
Data source: Brewster 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 Brewster Compares to Other Months

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

This table compares monthly weather conditions in Brewster, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)74 mm (2.9 inches)85%low
February Weather-2°C (29°F)55 mm (2.2 inches)86%moderate
March Weather4°C (39°F)42 mm (1.6 inches)86%moderate
April Weather9°C (48°F)33 mm (1.3 inches)82%high
May Weather15°C (59°F)24 mm (0.9 inches)77%very high
June Weather19°C (67°F)9 mm (0.3 inches)79%very high
July Weather23°C (74°F)2 mm (0.1 inches)77%very high
August Weather23°C (73°F)4 mm (0.2 inches)62%very high
September Weather17°C (62°F)20 mm (0.8 inches)60%high
October Weather8°C (48°F)42 mm (1.7 inches)80%moderate
November Weather3°C (37°F)54 mm (2.1 inches)87%moderate
December Weather-2°C (30°F)66 mm (2.6 inches)86%low

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