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December Weather in Marlboro, United States

Last updated: June 24, 2025

In December, the average temperature in Marlboro, United States hovers around 4°C (40°F). Expect a diverse range, with lows of -11°C (13°F) and highs of 19°C (66°F). Be prepared for some wet days, as precipitation averages around 105 mm (4.1 in) over 9 days. With an average humidity of 80%, it's wise to dress in layers for both warmth and comfort.

December Temperature in Marlboro

In December in Marlboro, the average temperature is 4°C (40°F). The maximum can reach 19°C (66°F), and the minimum can be as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures, so dressing in layers is advisable.

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

The chart illustrates December temperature patterns in Marlboro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marlboro, December typically has an average temperature of 4°C (40°F), with highs reaching up to 19°C (66°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec363843536372787670614740
Data source: Temperature data for Marlboro 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 Marlboro

In Marlboro in December, the total precipitation amount reaches 105 mm (4.1 in) over the course of 9 days.

December Precipitation Trends in Marlboro

The chart displays monthly precipitation patterns in Marlboro, 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 Marlboro, December typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec67110104111123931401339413989105
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Marlboro

In Marlboro in December, humidity is 80%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring careful planning for warmth and moisture management.

December Average Humidity in Marlboro

This chart illustrates the average monthly humidity levels in Marlboro, 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 Marlboro 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 Marlboro

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

Maximum UV Index Levels in Marlboro for December

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

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

This table compares monthly weather conditions in Marlboro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)67 mm (2.6 inches)84%moderate
February Weather4°C (39°F)110 mm (4.3 inches)82%moderate
March Weather6°C (44°F)104 mm (4.1 inches)81%high
April Weather12°C (53°F)111 mm (4.4 inches)78%very high
May Weather17°C (63°F)123 mm (4.9 inches)69%very high
June Weather22°C (73°F)93 mm (3.7 inches)69%very high
July Weather26°C (79°F)140 mm (5.5 inches)62%very high
August Weather25°C (77°F)133 mm (5.2 inches)65%very high
September Weather21°C (71°F)94 mm (3.7 inches)68%very high
October Weather16°C (61°F)139 mm (5.5 inches)74%high
November Weather8°C (48°F)88 mm (3.5 inches)82%moderate
December Weather4°C (40°F)105 mm (4.1 inches)80%low

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