December Weather in Randburg, South Africa

Last updated: August 31, 2025

In Randburg, South Africa, the average temperature in December hovers around 21°C (70°F). Expect a range that dips to a minimum of 11°C (52°F) and peaks at 35°C (95°F). During this month, you'll likely experience 131 mm (5.2 in) of precipitation spread over 16 days, accompanied by an average humidity of 81%. Stay prepared for a mix of warmth and moisture!

December Temperature in Randburg

In December in Randburg, the average temperature is 21°C (70°F). Maximums can reach 35°C (95°F), and minimums can be as low as 11°C (52°F). It’s a great time to visit for those who enjoy mild to warm weather, but be prepared for both hot days and cooler evenings.

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

The chart illustrates December temperature patterns in Randburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Randburg, December typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 11°C (52°F).

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

December Precipitation in Randburg

In Randburg in December, the precipitation amount is 131 mm (5.2 in) during 16 days, indicating a relatively wet period for the region.

December Precipitation Trends in Randburg

The chart displays monthly precipitation patterns in Randburg, 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 Randburg, December typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 16 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 Randburg

In Randburg in December, humidity is 81%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace, making outdoor activities slightly uncomfortable and necessitating frequent breaks in the shade or air conditioning for a refreshing escape.

December Average Humidity in Randburg

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

In Randburg 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 Randburg.

Maximum UV Index Levels in Randburg for December

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

Data source: Randburg 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 Randburg Compares to Other Months

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

This table compares monthly weather conditions in Randburg, 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 (71°F)	118 mm (4.7 inches)	79%	extreme
February Weather	21°C (70°F)	122 mm (4.8 inches)	77%	extreme
March Weather	20°C (68°F)	71 mm (2.8 inches)	77%	extreme
April Weather	17°C (63°F)	50 mm (2.0 inches)	81%	very high
May Weather	14°C (58°F)	10 mm (0.4 inches)	82%	high
June Weather	11°C (53°F)	6 mm (0.2 inches)	73%	high
July Weather	11°C (52°F)	2 mm (0.1 inches)	71%	high
August Weather	14°C (58°F)	2 mm (0.1 inches)	68%	very high
September Weather	18°C (65°F)	6 mm (0.2 inches)	74%	extreme
October Weather	19°C (67°F)	52 mm (2.0 inches)	74%	extreme
November Weather	21°C (70°F)	77 mm (3.0 inches)	82%	extreme
December Weather	21°C (70°F)	131 mm (5.2 inches)	81%	extreme