January Weather in Hartsville, United States

Last updated: June 24, 2025

In Hartsville, United States, the average temperature in January hovers around 4°C (40°F). While lows can dip to a brisk -15°C (5°F), highs may reach a comfortable 23°C (73°F). Expect an average of 106 mm (4.2 in) of precipitation spread over about 10 days, contributing to a notably high average humidity of 87%.

January Temperature in Hartsville

In January in Hartsville, the average temperature is 4°C (40°F), with maximums reaching 23°C (73°F) and minimums dropping to as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates January temperature patterns in Hartsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartsville, January typically has an average temperature of 4°C (40°F), with highs reaching up to 23°C (73°F) and lows dropping to around -15°C (5°F).

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

January Precipitation in Hartsville

In Hartsville in January, the precipitation amount is 106 mm (4.2 in) over a span of 10 days.

January Precipitation Trends in Hartsville

The chart displays monthly precipitation patterns in Hartsville, 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 Hartsville, January typically receives around 106 mm (4.2 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 Hartsville

In Hartsville in January humidity is 87%. With an average temperature of 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

January Average Humidity in Hartsville

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

In Hartsville in January, 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 Hartsville, you can check the information here.

Maximum UV Index Levels in Hartsville for January

The chart shows the monthly maximum UV Index (UVI) for Hartsville 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 Hartsville typically reaches 3, which falls under the moderate exposure category.

Data source: Hartsville 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 Hartsville Compares to Other Months

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

This table compares monthly weather conditions in Hartsville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	106 mm (4.2 inches)	87%	moderate
February Weather	7°C (45°F)	187 mm (7.4 inches)	86%	high
March Weather	11°C (52°F)	157 mm (6.2 inches)	86%	high
April Weather	15°C (59°F)	145 mm (5.7 inches)	82%	very high
May Weather	21°C (70°F)	119 mm (4.7 inches)	82%	very high
June Weather	24°C (76°F)	149 mm (5.9 inches)	83%	extreme
July Weather	27°C (80°F)	122 mm (4.8 inches)	80%	extreme
August Weather	25°C (78°F)	118 mm (4.7 inches)	74%	very high
September Weather	23°C (74°F)	120 mm (4.7 inches)	71%	very high
October Weather	17°C (63°F)	141 mm (5.6 inches)	78%	high
November Weather	9°C (48°F)	88 mm (3.5 inches)	88%	moderate
December Weather	7°C (45°F)	151 mm (6.0 inches)	88%	moderate