September Weather in Douglas, South Africa

Last updated: August 31, 2025

In Douglas, South Africa, the average temperature in September is a pleasant 18°C (65°F). However, be prepared for a wide range of temperatures, as it can drop to a chilling -1°C (30°F) at its lowest and reach the sweltering heights of 37°C (99°F) at its peak. Expect minimal precipitation, with about 6 mm (0.2 in) of rain falling over just 1 day. The average humidity sits comfortably at around 47%, making the climate quite moderate overall.

September Temperature in Douglas

In September in Douglas, the average temperature is 18°C (65°F). The maximum can reach 37°C (99°F), while the minimum can drop as low as -1°C (30°F). Be prepared for a diverse range of weather during your travels!

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

The chart illustrates September temperature patterns in Douglas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Douglas, September typically has an average temperature of 18°C (65°F), with highs reaching up to 37°C (99°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Douglas

In Douglas in September, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

September Precipitation Trends in Douglas

The chart displays monthly precipitation patterns in Douglas, 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 Douglas, September typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 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 Douglas

In Douglas in September humidity is 47%. With an average temperature of 18°C (65°F), this humidity feels like a comfortable embrace, making it an ideal time for exploring the local sights and enjoying outdoor activities without overwhelming discomfort.

September Average Humidity in Douglas

This chart illustrates the average monthly humidity levels in Douglas, 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 Douglas is approximately 47%, 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 Douglas

In Douglas 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 Douglas.

Maximum UV Index Levels in Douglas for September

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

Data source: Douglas 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 Douglas Compares to Other Months

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

This table compares monthly weather conditions in Douglas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	76 mm (3.0 inches)	58%	extreme
February Weather	25°C (77°F)	76 mm (3.0 inches)	58%	extreme
March Weather	23°C (73°F)	60 mm (2.4 inches)	65%	extreme
April Weather	19°C (66°F)	57 mm (2.2 inches)	75%	very high
May Weather	15°C (59°F)	6 mm (0.2 inches)	76%	high
June Weather	11°C (53°F)	2 mm (0.1 inches)	68%	moderate
July Weather	11°C (52°F)	2 mm (0.1 inches)	61%	moderate
August Weather	13°C (56°F)	4 mm (0.2 inches)	53%	very high
September Weather	18°C (65°F)	6 mm (0.2 inches)	47%	extreme
October Weather	21°C (70°F)	18 mm (0.7 inches)	36%	extreme
November Weather	24°C (75°F)	49 mm (1.9 inches)	42%	extreme
December Weather	25°C (78°F)	66 mm (2.6 inches)	52%	extreme