nomadseason

December Weather in Mount Pleasant, United States

Last updated: June 24, 2025

In December, the average temperature in Mount Pleasant, United States hovers around 1°C (34°F). Expect chilly conditions, with minimums dipping as low as -16°C (4°F) and highs reaching up to 14°C (58°F). Precipitation averages about 64 mm (2.5 in) over 8 days, contributing to an average humidity of 81%—making it a notably damp month!

December Temperature in Mount Pleasant

In December in Mount Pleasant, the average temperature is 1°C (34°F). Maximum temperatures can reach 14°C (58°F), while the minimum can be as low as -16°C (4°F). Travelers should be prepared for a chilly climate and pack accordingly for varied temperatures.

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 1°C (34°F), with highs reaching up to 14°C (58°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec272834394758687166544034
Data source: Temperature data for Mount Pleasant generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 precipitation amount is 64 mm (2.5 in) over the course of 8 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 64 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec757476112148876158861436864
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Mount Pleasant

In Mount Pleasant in December humidity is 81%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill wrapping around you, making traveling uncomfortable as every breath feels heavy and the cold penetration intensifies with the moisture in the air.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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 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 Mount Pleasant, you can visit Hourly UV Index in Mount Pleasant.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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 Weather-3°C (28°F)75 mm (2.9 inches)85%low
February Weather-2°C (28°F)74 mm (2.9 inches)85%moderate
March Weather1°C (34°F)76 mm (3.0 inches)85%moderate
April Weather4°C (40°F)112 mm (4.4 inches)85%very high
May Weather8°C (47°F)148 mm (5.8 inches)78%very high
June Weather15°C (59°F)87 mm (3.4 inches)80%very high
July Weather20°C (69°F)61 mm (2.4 inches)78%very high
August Weather21°C (71°F)58 mm (2.3 inches)76%very high
September Weather19°C (66°F)86 mm (3.4 inches)79%high
October Weather12°C (54°F)143 mm (5.6 inches)83%moderate
November Weather4°C (40°F)68 mm (2.7 inches)88%moderate
December Weather1°C (34°F)64 mm (2.5 inches)81%low

Compare Mount Pleasant's Climate with Cities Worldwide