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December Weather in Mount Pleasant, United States

Last updated: June 24, 2025

In December, the average temperature in Mount Pleasant, United States is a brisk 8°C (46°F), where it can occasionally dip as low as -10°C (15°F) or climb to a warm 23°C (74°F). Expect 147 mm (5.8 in) of precipitation over 11 days, with a notable average humidity of 88%. Embrace the cozy atmosphere of this chilly month!

December Temperature in Mount Pleasant

In December in Mount Pleasant, 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 Mount Pleasant an interesting destination for travelers seeking both mild days and wintery experiences.

December Weather in Mount Pleasant: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Mount Pleasant, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mount Pleasant, 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).
JanFebMarAprMayJunJulAugSepOctNovDec414654597076807874634946
Data source: Temperature data for Mount Pleasant 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 Mount Pleasant

In Mount Pleasant in December, the total precipitation amount is 147 mm (5.8 in), occurring over the course of 11 days.

December Precipitation Trends in Mount Pleasant

The chart displays monthly precipitation patterns in Mount Pleasant, 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 Mount Pleasant, December typically receives around 147 mm (5.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec11017517216311312812012811811774147
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mount Pleasant

In Mount Pleasant 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 Mount Pleasant

This chart illustrates the average monthly humidity levels in Mount Pleasant, 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 Mount Pleasant 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 Mount Pleasant

In Mount Pleasant 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 Mount Pleasant, you can check the information here.

Maximum UV Index Levels in Mount Pleasant for December

The chart shows the monthly maximum UV Index (UVI) for Mount Pleasant 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 Mount Pleasant typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710101111109753
Data source: Mount Pleasant 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 Mount Pleasant Compares to Other Months

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

This table compares monthly weather conditions in Mount Pleasant, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)110 mm (4.3 inches)87%moderate
February Weather8°C (46°F)175 mm (6.9 inches)87%high
March Weather12°C (54°F)172 mm (6.8 inches)85%high
April Weather15°C (60°F)163 mm (6.4 inches)82%very high
May Weather21°C (70°F)113 mm (4.5 inches)83%very high
June Weather25°C (77°F)128 mm (5.0 inches)82%extreme
July Weather26°C (80°F)120 mm (4.7 inches)78%extreme
August Weather25°C (78°F)128 mm (5.0 inches)67%very high
September Weather23°C (74°F)118 mm (4.7 inches)64%very high
October Weather17°C (64°F)117 mm (4.6 inches)74%high
November Weather9°C (49°F)74 mm (2.9 inches)87%moderate
December Weather8°C (46°F)147 mm (5.8 inches)88%moderate

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