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December Weather in Millbrook, United States

Last updated: June 24, 2025

In December, the average temperature in Millbrook, United States hovers around 1°C (34°F), presenting a chill that can drop to as low as -18°C (0°F). However, the mercury can also rise to a pleasant 16°C (62°F) on warmer days. Expect around 97 mm (3.8 in) of precipitation spread across 11 days, contributing to an average humidity level of 80%. Stay prepared for a mix of cold and wet weather!

December Temperature in Millbrook

In December in Millbrook, the average temperature is 1°C (34°F), with maximums reaching 16°C (62°F) and minimums dropping as low as -18°C (0°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to ensure comfort during their visit.

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

The chart illustrates December temperature patterns in Millbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Millbrook, December typically has an average temperature of 1°C (34°F), with highs reaching up to 16°C (62°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec303338496069757366564234
Data source: Temperature data for Millbrook 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 Millbrook

In Millbrook in December, the total precipitation amount is 97 mm (3.8 in) over the course of 11 days.

December Precipitation Trends in Millbrook

The chart displays monthly precipitation patterns in Millbrook, 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 Millbrook, December typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec668782113106771011011051278697
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Millbrook

In Millbrook in December, humidity is 80%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill that seeps through your layers, making outdoor activities uncomfortable and potentially discouraging for travelers.

December Average Humidity in Millbrook

This chart illustrates the average monthly humidity levels in Millbrook, 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 Millbrook is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Millbrook

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

Maximum UV Index Levels in Millbrook for December

The chart shows the monthly maximum UV Index (UVI) for Millbrook 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 Millbrook typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Millbrook 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 Millbrook Compares to Other Months

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

This table compares monthly weather conditions in Millbrook, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)66 mm (2.6 inches)84%moderate
February Weather0°C (33°F)87 mm (3.4 inches)82%moderate
March Weather3°C (39°F)82 mm (3.2 inches)81%high
April Weather9°C (49°F)113 mm (4.4 inches)78%very high
May Weather15°C (60°F)106 mm (4.2 inches)69%very high
June Weather20°C (69°F)77 mm (3.0 inches)69%very high
July Weather24°C (75°F)101 mm (4.0 inches)62%very high
August Weather23°C (74°F)101 mm (4.0 inches)65%very high
September Weather19°C (67°F)105 mm (4.1 inches)68%very high
October Weather13°C (56°F)127 mm (5.0 inches)74%high
November Weather6°C (42°F)86 mm (3.4 inches)82%moderate
December Weather1°C (34°F)97 mm (3.8 inches)80%low

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