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December Weather in Chilmark, United States

Last updated: June 24, 2025

In December, the average temperature in Chilmark, United States hovers around 5°C (42°F), with a minimum of -10°C (14°F) and a maximum reaching 16°C (62°F). Expect about 130 mm (5.1 in) of precipitation spread over 12 days, contributing to an average humidity of 80%.

December Temperature in Chilmark

In December in Chilmark, the average temperature is 5°C (42°F). Maximum temperatures can reach 16°C (62°F), while minimums can drop as low as -10°C (14°F). Be prepared for a mix of chilly days and milder weather, perfect for layering up and exploring the sights.

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

The chart illustrates December temperature patterns in Chilmark, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chilmark, December typically has an average temperature of 5°C (42°F), with highs reaching up to 16°C (62°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec373738455262707167605042
Data source: Temperature data for Chilmark 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 Chilmark

In Chilmark in December, the precipitation amount is 130 mm (5.1 in) over a span of 12 days.

December Precipitation Trends in Chilmark

The chart displays monthly precipitation patterns in Chilmark, 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 Chilmark, December typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec95118117128123887590111171105130
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chilmark

In Chilmark in December humidity is 80%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that can seep into your bones, making outdoor adventures uncomfortable and urging travelers to seek warm shelter often.

December Average Humidity in Chilmark

This chart illustrates the average monthly humidity levels in Chilmark, 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 Chilmark is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chilmark

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

Maximum UV Index Levels in Chilmark for December

The chart shows the monthly maximum UV Index (UVI) for Chilmark 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 Chilmark typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Chilmark 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 Chilmark Compares to Other Months

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

This table compares monthly weather conditions in Chilmark, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)95 mm (3.7 inches)84%moderate
February Weather3°C (37°F)118 mm (4.6 inches)84%moderate
March Weather4°C (39°F)117 mm (4.6 inches)82%high
April Weather7°C (46°F)128 mm (5.0 inches)79%very high
May Weather11°C (53°F)123 mm (4.8 inches)75%very high
June Weather16°C (62°F)88 mm (3.4 inches)78%very high
July Weather21°C (70°F)75 mm (3.0 inches)76%very high
August Weather22°C (72°F)90 mm (3.6 inches)76%very high
September Weather19°C (67°F)111 mm (4.4 inches)75%very high
October Weather16°C (61°F)170 mm (6.7 inches)75%high
November Weather10°C (50°F)105 mm (4.1 inches)80%moderate
December Weather5°C (42°F)130 mm (5.1 inches)80%low

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