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December Weather in Brattleboro, United States

Last updated: June 24, 2025

In December, the average temperature in Brattleboro, United States hovers around -1°C (30°F). However, temperatures can vary significantly, with a minimum of -23°C (-9°F) and a maximum reaching 16°C (60°F). Expect precipitation to total 116 mm (4.6 in) over approximately 10 days, coupled with a high average humidity of 84%.

December Temperature in Brattleboro

In December in Brattleboro, the average temperature is -1°C (30°F), with maximums reaching 16°C (60°F) and minimums dropping to as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm and cooler weather clothing to enjoy their visit.

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

The chart illustrates December temperature patterns in Brattleboro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brattleboro, December typically has an average temperature of -1°C (30°F), with highs reaching up to 16°C (60°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec262934465868737164533930
Data source: Temperature data for Brattleboro 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 Brattleboro

In Brattleboro in December, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.

December Precipitation Trends in Brattleboro

The chart displays monthly precipitation patterns in Brattleboro, 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 Brattleboro, December typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec77907613089761239090148100116
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Brattleboro

In Brattleboro in December, humidity is 84%. With an average temperature of -1°C (30°F), this humidity feels like a sharp chill that seeps into your bones, making travel uncomfortable as the wetness in the air intensifies the cold, leaving you yearning for warmth and shelter.

December Average Humidity in Brattleboro

This chart illustrates the average monthly humidity levels in Brattleboro, 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 Brattleboro is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Brattleboro

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

Maximum UV Index Levels in Brattleboro for December

The chart shows the monthly maximum UV Index (UVI) for Brattleboro 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 Brattleboro typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997632
Data source: Brattleboro 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 Brattleboro Compares to Other Months

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

This table compares monthly weather conditions in Brattleboro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)77 mm (3.0 inches)89%moderate
February Weather-2°C (29°F)90 mm (3.5 inches)88%moderate
March Weather1°C (35°F)76 mm (3.0 inches)86%high
April Weather8°C (46°F)130 mm (5.1 inches)84%very high
May Weather14°C (58°F)88 mm (3.5 inches)76%very high
June Weather20°C (68°F)76 mm (3.0 inches)72%very high
July Weather23°C (73°F)123 mm (4.9 inches)66%very high
August Weather22°C (71°F)90 mm (3.6 inches)64%very high
September Weather18°C (64°F)90 mm (3.5 inches)72%high
October Weather11°C (53°F)148 mm (5.8 inches)81%high
November Weather4°C (39°F)100 mm (3.9 inches)87%moderate
December Weather-1°C (30°F)116 mm (4.6 inches)84%low

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