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December Weather in Chapel Hill, United States

Last updated: June 24, 2025

In December, the average temperature in Chapel Hill, United States hovers around 8°C (46°F). Expect a broad range, with minimums dipping to -10°C (15°F) and maximums reaching up to 23°C (74°F). Be prepared for wet days, as precipitation amounts to 151 mm (6.0 in) over 11 days. With an average humidity of 88%, it’s a month where you’ll definitely feel the chill!

December Temperature in Chapel Hill

In December in Chapel Hill, the average temperature is 8°C (46°F). The maximum can reach 23°C (74°F), while the minimum can drop as low as -10°C (15°F). This diverse range of temperatures makes Chapel Hill an interesting destination for travelers seeking both mild days and wintery experiences.

December Weather in Chapel Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Chapel Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chapel Hill, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (74°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653597076807874634946
Data source: Temperature data for Chapel Hill 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 Chapel Hill

In Chapel Hill in December, the precipitation amount reaches 151 mm (6.0 in) over a span of 11 days.

December Precipitation Trends in Chapel Hill

The chart displays monthly precipitation patterns in Chapel Hill, 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 Chapel Hill, December typically receives around 151 mm (6.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10818317615211513713312112112679151
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chapel Hill

In Chapel Hill in December, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

December Average Humidity in Chapel Hill

This chart illustrates the average monthly humidity levels in Chapel Hill, 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 Chapel Hill is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chapel Hill

In Chapel Hill in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Chapel Hill, you can check the information here.

Maximum UV Index Levels in Chapel Hill for December

The chart shows the monthly maximum UV Index (UVI) for Chapel Hill 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 Chapel Hill typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Chapel Hill 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 Chapel Hill Compares to Other Months

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

This table compares monthly weather conditions in Chapel Hill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)108 mm (4.3 inches)87%moderate
February Weather8°C (46°F)183 mm (7.2 inches)87%high
March Weather12°C (53°F)176 mm (6.9 inches)85%high
April Weather15°C (60°F)152 mm (6.0 inches)82%very high
May Weather21°C (70°F)115 mm (4.5 inches)83%very high
June Weather25°C (77°F)137 mm (5.4 inches)82%extreme
July Weather26°C (80°F)133 mm (5.2 inches)78%extreme
August Weather25°C (78°F)121 mm (4.8 inches)67%very high
September Weather23°C (74°F)121 mm (4.8 inches)64%very high
October Weather17°C (64°F)126 mm (5.0 inches)74%high
November Weather9°C (49°F)79 mm (3.1 inches)87%moderate
December Weather8°C (46°F)151 mm (6.0 inches)88%moderate

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