January Weather in Summerville, United States

Last updated: June 24, 2025

In January, the average temperature in Summerville, United States hovers around 10°C (51°F), with a minimum of -10°C (13°F) and a maximum reaching 27°C (80°F). Expect 64 mm (2.5 in) of precipitation spread over 8 days, accompanied by a high average humidity of 86%. Stay prepared for a mix of chilly and warm days!

January Temperature in Summerville

In January in Summerville, the average temperature is 10°C (51°F). Maximums can reach 27°C (80°F), while minimums can drop as low as -10°C (13°F). Be prepared for a wide range of temperatures when traveling to Summerville during this month!

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

The chart illustrates January 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, January typically has an average temperature of 10°C (51°F), with highs reaching up to 27°C (80°F) and lows dropping to around -10°C (13°F).

Data source: Temperature data for Summerville generated using information from the Copernicus Climate Change Service.

January Precipitation in Summerville

In Summerville in January, the precipitation amount is 64 mm (2.5 in) over the course of 8 days.

January Precipitation Trends in Summerville

The chart displays monthly precipitation patterns in Summerville, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Summerville, January typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Summerville

In Summerville in January humidity is 86%. With an average temperature of 10°C (51°F), this humidity feels like a cool, damp blanket enveloping you, making traveling feel invigorating yet slightly uncomfortable without the right layers.

January Average Humidity in Summerville

This chart illustrates the average monthly humidity levels in Summerville, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Summerville is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Summerville

In Summerville in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Summerville in January, 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 January, the maximum UV index in Summerville typically reaches 4, which falls under the moderate exposure category.

Data source: Summerville January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	64 mm (2.5 inches)	86%	moderate
February Weather	13°C (56°F)	92 mm (3.6 inches)	81%	high
March Weather	15°C (60°F)	71 mm (2.8 inches)	81%	very high
April Weather	19°C (66°F)	108 mm (4.2 inches)	79%	very high
May Weather	23°C (74°F)	92 mm (3.6 inches)	75%	extreme
June Weather	26°C (79°F)	156 mm (6.1 inches)	75%	extreme
July Weather	27°C (81°F)	191 mm (7.5 inches)	80%	extreme
August Weather	27°C (81°F)	176 mm (6.9 inches)	81%	extreme
September Weather	25°C (77°F)	146 mm (5.8 inches)	83%	very high
October Weather	21°C (70°F)	75 mm (3.0 inches)	78%	very high
November Weather	14°C (57°F)	70 mm (2.8 inches)	85%	high
December Weather	12°C (53°F)	132 mm (5.2 inches)	87%	moderate