May Weather in Harrismith, South Africa

Last updated: August 31, 2025

In May, the average temperature in Harrismith, South Africa hovers around 12°C (54°F). Expect a chilly minimum of -1°C (30°F) and a pleasant maximum of 27°C (80°F). With 19 mm (0.7 in) of precipitation over just 2 days, don't forget your umbrella! Additionally, you'll experience a high humidity level of 88%, adding to the overall ambiance of the season.

May Temperature in Harrismith

In May in Harrismith, the average temperature is 12°C (54°F), with maximums reaching up to 27°C (80°F) and minimums that can drop as low as -1°C (30°F). This variation in weather makes it essential for travelers to pack accordingly, ensuring they are prepared for both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Harrismith, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harrismith, May typically has an average temperature of 12°C (54°F), with highs reaching up to 27°C (80°F) and lows dropping to around -1°C (30°F).

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

May Precipitation in Harrismith

In Harrismith in May, the precipitation amount is 19 mm (0.7 in) over a span of 2 days.

May Precipitation Trends in Harrismith

The chart displays monthly precipitation patterns in Harrismith, 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 Harrismith, May typically receives around 19 mm (0.7 inches) of precipitation spread over approximately 2 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 Harrismith

In Harrismith in May, humidity is 88%. With an average temperature of 12°C (54°F), this humidity feels like a thick, damp blanket, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat even in cooler weather.

May Average Humidity in Harrismith

This chart illustrates the average monthly humidity levels in Harrismith, 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 Harrismith is approximately 88%, 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 Harrismith

In Harrismith in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Harrismith.

Maximum UV Index Levels in Harrismith for May

The chart shows the monthly maximum UV Index (UVI) for Harrismith 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 Harrismith typically reaches 7, which falls under the high exposure category.

Data source: Harrismith 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 Harrismith Compares to Other Months

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

This table compares monthly weather conditions in Harrismith, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (66°F)	133 mm (5.2 inches)	85%	extreme
February Weather	19°C (66°F)	156 mm (6.1 inches)	85%	extreme
March Weather	18°C (64°F)	86 mm (3.4 inches)	86%	extreme
April Weather	15°C (59°F)	62 mm (2.5 inches)	87%	very high
May Weather	12°C (54°F)	19 mm (0.7 inches)	88%	high
June Weather	10°C (50°F)	5 mm (0.2 inches)	83%	moderate
July Weather	10°C (49°F)	2 mm (0.1 inches)	74%	high
August Weather	12°C (54°F)	24 mm (1.0 inches)	66%	very high
September Weather	15°C (60°F)	25 mm (1.0 inches)	75%	extreme
October Weather	16°C (62°F)	73 mm (2.9 inches)	80%	extreme
November Weather	18°C (64°F)	108 mm (4.3 inches)	86%	extreme
December Weather	18°C (65°F)	172 mm (6.8 inches)	86%	extreme