December Weather in Harrismith, South Africa

Last updated: August 31, 2025

In December, the average temperature in Harrismith, South Africa is a pleasant 18°C (65°F). However, temperatures can vary significantly, with a minimum of 7°C (45°F) and a maximum reaching up to 33°C (92°F). Expect 172 mm (6.8 in) of precipitation spread over about 20 days, and be prepared for high humidity levels averaging 86%.

December Temperature in Harrismith

In December in Harrismith, the average temperature is 18°C (65°F). Maximum temperatures can reach 33°C (92°F), while the minimum can drop as low as 7°C (45°F). It’s an ideal time to visit for those who enjoy mild weather with the potential for warm days and cooler evenings.

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

The chart illustrates December 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, December typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 7°C (45°F).

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

December Precipitation in Harrismith

In Harrismith in December, the total precipitation amount is 172 mm (6.8 in) spread over 20 days.

December Precipitation Trends in Harrismith

The chart displays monthly precipitation patterns in Harrismith, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Harrismith, December typically receives around 172 mm (6.8 inches) of precipitation spread over approximately 20 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Harrismith

In Harrismith in December humidity is 86%. With an average temperature of 18°C (65°F), this humidity feels like you’re wrapped in a warm, heavy blanket, making outdoor activities feel quite muggy and sticky for traveling.

December Average Humidity in Harrismith

This chart illustrates the average monthly humidity levels in Harrismith, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Harrismith is approximately 86%, offering insight into how humid the weather typically is during this month.

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

December UV Index in Harrismith

In Harrismith in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Harrismith.

Maximum UV Index Levels in Harrismith for December

The chart shows the monthly maximum UV Index (UVI) for Harrismith in December, 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 December, the maximum UV index in Harrismith typically reaches 16, which falls under the extreme exposure category.

Data source: Harrismith December 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 December 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 December’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 December’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