September Weather in Randfontein, South Africa

Last updated: August 31, 2025

In September, the average temperature in Randfontein, South Africa hovers around 18°C (64°F). Be prepared for temperature fluctuations, as it can dip to a minimum of -1°C (31°F) and soar to a maximum of 32°C (91°F). During this time, you can expect around 8 mm (0.3 in) of precipitation spread over 2 days, with an average humidity level of 74%. A diverse climate, indeed!

September Temperature in Randfontein

In September in Randfontein, the average temperature is 18°C (64°F). Maximum temperatures can reach 32°C (91°F), while the minimum can drop as low as -1°C (31°F). Visitors should be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates September 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, September typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (91°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Randfontein

In Randfontein in September, the precipitation amount is 8 mm (0.3 in) over the course of 2 days.

September Precipitation Trends in Randfontein

The chart displays monthly precipitation patterns in Randfontein, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Randfontein, September typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Randfontein

In Randfontein in September humidity is 74%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls but potentially uncomfortable for extended outdoor activities.

September Average Humidity in Randfontein

This chart illustrates the average monthly humidity levels in Randfontein, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Randfontein is approximately 74%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Randfontein

In Randfontein in September, 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 Randfontein.

Maximum UV Index Levels in Randfontein for September

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

Data source: Randfontein September 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 September 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 September’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 September’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