September Weather in Germiston, South Africa

Last updated: August 31, 2025

In Germiston, South Africa during September, the average temperature hovers around 18°C (64°F). However, temperatures can fluctuate between a brisk -1°C (31°F) at night and a warm 32°C (91°F) during the day. You're likely to encounter 9 mm (0.4 in) of precipitation over about 2 days, coupled with an average humidity of 74%. Prepare accordingly for a mix of cool and warm weather this month!

September Temperature in Germiston

In September in Germiston, 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 Germiston: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Germiston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Germiston, 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 Germiston generated using information from the Copernicus Climate Change Service.

September Precipitation in Germiston

In Germiston in September, the precipitation amount is 9 mm (0.4 in) over the course of 2 days.

September Precipitation Trends in Germiston

The chart displays monthly precipitation patterns in Germiston, 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 Germiston, September typically receives around 9 mm (0.4 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 Germiston

In Germiston 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 Germiston

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

In Germiston 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 Germiston.

Maximum UV Index Levels in Germiston for September

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

Data source: Germiston 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 Germiston Compares to Other Months

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

This table compares monthly weather conditions in Germiston, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	124 mm (4.9 inches)	79%	extreme
February Weather	20°C (68°F)	134 mm (5.3 inches)	77%	extreme
March Weather	19°C (66°F)	74 mm (2.9 inches)	77%	extreme
April Weather	16°C (62°F)	60 mm (2.4 inches)	81%	very high
May Weather	13°C (56°F)	14 mm (0.5 inches)	82%	high
June Weather	11°C (51°F)	5 mm (0.2 inches)	73%	high
July Weather	10°C (51°F)	2 mm (0.1 inches)	71%	high
August Weather	14°C (57°F)	3 mm (0.1 inches)	68%	very high
September Weather	18°C (64°F)	9 mm (0.4 inches)	74%	extreme
October Weather	19°C (66°F)	64 mm (2.5 inches)	74%	extreme
November Weather	20°C (68°F)	95 mm (3.7 inches)	82%	extreme
December Weather	20°C (69°F)	147 mm (5.8 inches)	81%	extreme