January Weather in Summerville, United States

Last updated: June 24, 2025

In Summerville, United States, the average temperature in January hovers around 7°C (44°F). Expect a range where the minimum can plunge to -12°C (10°F) while the maximum can soar to 24°C (76°F). During this period, the area receives about 123 mm (4.8 in) of precipitation over approximately 10 days, with an average humidity level of a high 87%.

January Temperature in Summerville

In January in Summerville, the average temperature is 7°C (44°F). Maximums can reach 24°C (76°F), while minimums can drop as low as -12°C (10°F). This variation means travelers should be prepared for both warm days and chilly nights.

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 7°C (44°F), with highs reaching up to 24°C (76°F) and lows dropping to around -12°C (10°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 total precipitation amount is 123 mm (4.8 in) over the course of 10 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 123 mm (4.8 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Summerville

In Summerville in January, humidity is 87%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring travelers to layer up to stay warm and dry.

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 87%, 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	7°C (44°F)	123 mm (4.8 inches)	87%	moderate
February Weather	10°C (50°F)	198 mm (7.8 inches)	87%	high
March Weather	13°C (56°F)	169 mm (6.7 inches)	85%	very high
April Weather	16°C (62°F)	153 mm (6.0 inches)	82%	very high
May Weather	22°C (71°F)	95 mm (3.7 inches)	83%	extreme
June Weather	25°C (76°F)	129 mm (5.1 inches)	82%	extreme
July Weather	26°C (80°F)	113 mm (4.4 inches)	78%	extreme
August Weather	26°C (79°F)	138 mm (5.4 inches)	67%	extreme
September Weather	24°C (75°F)	111 mm (4.4 inches)	64%	very high
October Weather	18°C (65°F)	136 mm (5.4 inches)	74%	high
November Weather	11°C (51°F)	89 mm (3.5 inches)	87%	high
December Weather	8°C (47°F)	161 mm (6.3 inches)	88%	moderate