December Weather in Randfontein, South Africa

Last updated: August 31, 2025

In December, the average temperature in Randfontein, South Africa hovers around 20°C (69°F). Expect lows of 10°C (51°F) and highs reaching up to 34°C (93°F). During this month, 145 mm (5.7 in) of precipitation can be expected over 19 days, maintaining an average humidity of 81%. Stay prepared for a mix of warm weather and occasional rain!

December Temperature in Randfontein

In December in Randfontein, the average temperature is 20°C (69°F). Maximums can reach 34°C (93°F), and minimums can drop to as low as 10°C (51°F). It's an ideal time to experience the pleasant warmth while packing layers for cooler nights.

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

The chart illustrates December temperature patterns in Randfontein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Randfontein, December typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (51°F).

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

December Precipitation in Randfontein

In Randfontein in December, the precipitation amount is 145 mm (5.7 in) over a period of 19 days.

December Precipitation Trends in Randfontein

The chart displays monthly precipitation patterns in Randfontein, 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 Randfontein, December typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 19 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 Randfontein

In Randfontein in December, humidity is 81%. With an average temperature of 20°C (69°F), this humidity feels like a thick blanket embracing you, making travel a bit uncomfortable and sticky.

December Average Humidity in Randfontein

This chart illustrates the average monthly humidity levels in Randfontein, 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 Randfontein is approximately 81%, 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 Randfontein

In Randfontein 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 Randfontein.

Maximum UV Index Levels in Randfontein for December

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

Data source: Randfontein 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 Randfontein Compares to Other Months

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

This table compares monthly weather conditions in Randfontein, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	129 mm (5.1 inches)	79%	extreme
February Weather	20°C (68°F)	141 mm (5.5 inches)	77%	extreme
March Weather	19°C (66°F)	75 mm (3.0 inches)	77%	extreme
April Weather	16°C (62°F)	61 mm (2.4 inches)	81%	extreme
May Weather	13°C (56°F)	12 mm (0.5 inches)	82%	high
June Weather	11°C (52°F)	8 mm (0.3 inches)	73%	high
July Weather	10°C (51°F)	3 mm (0.1 inches)	71%	high
August Weather	14°C (57°F)	2 mm (0.1 inches)	68%	very high
September Weather	18°C (64°F)	8 mm (0.3 inches)	74%	extreme
October Weather	19°C (66°F)	59 mm (2.3 inches)	74%	extreme
November Weather	20°C (69°F)	100 mm (4.0 inches)	82%	extreme
December Weather	20°C (69°F)	145 mm (5.7 inches)	81%	extreme