nomadseason

December Weather in Summerville, United States

Last updated: June 24, 2025

In December, the average temperature in Summerville, United States hovers around 8°C (47°F). Expect a range between a chilly -7°C (20°F) and a pleasant 24°C (75°F). During this month, anticipate 161 mm (6.3 in) of precipitation spread over 12 days, contributing to an average humidity of a high 88%. Stay prepared for the variations and embrace the mood of the season!

December Temperature in Summerville

In December in Summerville, the average temperature is 8°C (47°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as -7°C (20°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates December temperature patterns in Summerville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summerville, December typically has an average temperature of 8°C (47°F), with highs reaching up to 24°C (75°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec444955627176807875655147
Data source: Temperature data for Summerville 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 Summerville

In Summerville in December, the total precipitation amount is 161 mm (6.3 in) over a span of 12 days.

December Precipitation Trends in Summerville

The chart displays monthly precipitation patterns in Summerville, 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 Summerville, December typically receives around 161 mm (6.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1231981691539512911313811113689161
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Summerville

In Summerville in December, humidity is 88%. With an average temperature of 8°C (47°F), this humidity feels like a thick, damp blanket wrapping around you, making even short walks feel heavy and uninviting for travel.

December Average Humidity in Summerville

This chart illustrates the average monthly humidity levels in Summerville, 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 Summerville 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 Summerville

In Summerville 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 Summerville for better planning.

Maximum UV Index Levels in Summerville for December

The chart shows the monthly maximum UV Index (UVI) for Summerville 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 Summerville typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111119764
Data source: Summerville 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 Summerville Compares to Other Months

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

This table compares monthly weather conditions in Summerville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)123 mm (4.8 inches)87%moderate
February Weather10°C (50°F)198 mm (7.8 inches)87%high
March Weather13°C (56°F)169 mm (6.7 inches)85%very high
April Weather16°C (62°F)153 mm (6.0 inches)82%very high
May Weather22°C (71°F)95 mm (3.7 inches)83%extreme
June Weather25°C (76°F)129 mm (5.1 inches)82%extreme
July Weather26°C (80°F)113 mm (4.4 inches)78%extreme
August Weather26°C (79°F)138 mm (5.4 inches)67%extreme
September Weather24°C (75°F)111 mm (4.4 inches)64%very high
October Weather18°C (65°F)136 mm (5.4 inches)74%high
November Weather11°C (51°F)89 mm (3.5 inches)87%high
December Weather8°C (47°F)161 mm (6.3 inches)88%moderate

Compare Summerville's Climate with Cities Worldwide