January Weather in Harleyville, United States

Last updated: June 24, 2025

In January, the average temperature in Harleyville, United States is a brisk 10°C (50°F). Expect minimums dipping to -10°C (15°F) and maximums soaring to 27°C (80°F). This month also sees 73 mm (2.9 in) of precipitation over 8 days, with an average humidity of 86%, making it a uniquely invigorating time of year!

January Temperature in Harleyville

In January in Harleyville, the average temperature is 10°C (50°F). The maximum can reach 27°C (80°F) and the minimum can be as low as -10°C (15°F). This variation in temperature suggests that travelers should prepare for a wide range of conditions, ensuring they pack both warm and light clothing to enjoy their visit comfortably.

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

The chart illustrates January temperature patterns in Harleyville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harleyville, January typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (80°F) and lows dropping to around -10°C (15°F).

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

January Precipitation in Harleyville

In Harleyville in January, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

January Precipitation Trends in Harleyville

The chart displays monthly precipitation patterns in Harleyville, 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 Harleyville, January typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 8 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 Harleyville

In Harleyville in January humidity is 86%. With an average temperature of 10°C (50°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and sticky, which can dampen the spirit of travel.

January Average Humidity in Harleyville

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

In Harleyville 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 Harleyville for better planning.

Maximum UV Index Levels in Harleyville for January

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

Data source: Harleyville 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 Harleyville Compares to Other Months

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

This table compares monthly weather conditions in Harleyville, 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 (50°F)	73 mm (2.9 inches)	86%	moderate
February Weather	13°C (56°F)	98 mm (3.9 inches)	81%	high
March Weather	15°C (59°F)	75 mm (3.0 inches)	81%	very high
April Weather	19°C (66°F)	109 mm (4.3 inches)	79%	very high
May Weather	23°C (74°F)	96 mm (3.8 inches)	75%	extreme
June Weather	26°C (79°F)	122 mm (4.8 inches)	75%	extreme
July Weather	27°C (82°F)	166 mm (6.6 inches)	80%	extreme
August Weather	27°C (81°F)	144 mm (5.7 inches)	81%	extreme
September Weather	25°C (78°F)	117 mm (4.6 inches)	83%	very high
October Weather	21°C (70°F)	64 mm (2.5 inches)	78%	very high
November Weather	14°C (57°F)	66 mm (2.6 inches)	85%	high
December Weather	11°C (53°F)	135 mm (5.3 inches)	87%	moderate