May Weather in Harleyville, United States

Last updated: June 24, 2025

In May, the average temperature in Harleyville, United States hovers around 23°C (74°F), making it a pleasant time of year. However, be prepared for a temperature range that can dip to a minimum of 6°C (44°F) and soar to a maximum of 38°C (101°F). With an average humidity of 75% and a total precipitation of 96 mm (3.8 in) spread over 9 days, you might want to keep an umbrella handy while enjoying the warm weather!

May Temperature in Harleyville

In May in Harleyville, the average temperature is 23°C (74°F). The maximum can reach 38°C (101°F), while the minimum can drop as low as 6°C (44°F). It's a great time to visit if you enjoy warm weather with a chance of cooler evenings.

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

The chart illustrates May 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, May typically has an average temperature of 23°C (74°F), with highs reaching up to 38°C (101°F) and lows dropping to around 6°C (44°F).

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

May Precipitation in Harleyville

In Harleyville in May, the total precipitation amount is 96 mm (3.8 in) spread over a period of 9 days.

May Precipitation Trends in Harleyville

The chart displays monthly precipitation patterns in Harleyville, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Harleyville, May typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Harleyville

In Harleyville in May, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

May Average Humidity in Harleyville

This chart illustrates the average monthly humidity levels in Harleyville, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Harleyville is approximately 75%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Harleyville

In Harleyville in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Harleyville.

Maximum UV Index Levels in Harleyville for May

The chart shows the monthly maximum UV Index (UVI) for Harleyville in May, 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 May, the maximum UV index in Harleyville typically reaches 11, which falls under the extreme exposure category.

Data source: Harleyville May 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 May 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 May’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 May’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