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December Weather in Rock Mills, United States

Last updated: June 24, 2025

In December, the average temperature in Rock Mills, United States hovers around 10°C (49°F). Expect a notable range, with minimums dipping to -8°C (18°F) and maximums climbing to 24°C (75°F). Rainfall is not uncommon, with 145 mm (5.7 in) of precipitation spread over 12 days, contributing to a high average humidity of 88%.

December Temperature in Rock Mills

In December in Rock Mills, the average temperature is 10°C (49°F). Maximums can reach 24°C (75°F) and minimums can be as low as -8°C (18°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

December Weather in Rock Mills: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rock Mills, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rock Mills, December typically has an average temperature of 10°C (49°F), with highs reaching up to 24°C (75°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec465257637177807976675349
Data source: Temperature data for Rock Mills 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 Rock Mills

In Rock Mills in December, the precipitation amount is 145 mm (5.7 in) over the course of 12 days.

December Precipitation Trends in Rock Mills

The chart displays monthly precipitation patterns in Rock Mills, 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 Rock Mills, December typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10814611413010111810513110211784145
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rock Mills

In Rock Mills in December humidity is 88%. With an average temperature of 10°C (49°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and leading to a sense of sluggishness that can dampen the excitement of exploring the area.

December Average Humidity in Rock Mills

This chart illustrates the average monthly humidity levels in Rock Mills, 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 Rock Mills is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%81%77%77%72%73%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rock Mills

In Rock Mills in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Rock Mills for better planning.

Maximum UV Index Levels in Rock Mills for December

The chart shows the monthly maximum UV Index (UVI) for Rock Mills 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 Rock Mills typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Rock Mills 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 Rock Mills Compares to Other Months

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

This table compares monthly weather conditions in Rock Mills, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)108 mm (4.3 inches)85%moderate
February Weather11°C (53°F)146 mm (5.7 inches)84%high
March Weather14°C (58°F)114 mm (4.5 inches)82%very high
April Weather17°C (63°F)130 mm (5.1 inches)82%very high
May Weather22°C (72°F)101 mm (4.0 inches)81%extreme
June Weather25°C (77°F)118 mm (4.6 inches)77%extreme
July Weather26°C (80°F)105 mm (4.1 inches)77%extreme
August Weather26°C (79°F)131 mm (5.2 inches)72%extreme
September Weather24°C (76°F)102 mm (4.0 inches)73%very high
October Weather19°C (67°F)117 mm (4.6 inches)73%very high
November Weather12°C (53°F)84 mm (3.3 inches)85%high
December Weather10°C (49°F)145 mm (5.7 inches)88%moderate

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