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September Weather in Atlantis, South Africa

Last updated: August 31, 2025

In Atlantis, South Africa, the average temperature in September hovers around 15°C (59°F). However, be prepared for temperature swings, as lows can dip to 3°C (37°F), while highs may soar up to 36°C (98°F). Expect some moisture with an average precipitation of 27 mm (1.1 in) over 6 days, bringing an average humidity of 74% to the mix.

September Temperature in Atlantis

In September in Atlantis, the average temperature is 15°C (59°F). Maximum temperatures can reach 36°C (98°F), while the minimum can drop as low as 3°C (37°F). It's advisable to pack layers and be prepared for both warm and cool conditions while traveling.

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

The chart illustrates September temperature patterns in Atlantis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atlantis, September typically has an average temperature of 15°C (59°F), with highs reaching up to 36°C (98°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec737369656056545458646770
Data source: Temperature data for Atlantis generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Atlantis

In Atlantis in September, the precipitation amount is 27 mm (1.1 in) over a period of 6 days.

September Precipitation Trends in Atlantis

The chart displays monthly precipitation patterns in Atlantis, 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 Atlantis, September typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec9614183974715127222817
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Atlantis

In Atlantis in September, humidity is 74%. With an average temperature of 15°C (59°F), this humidity feels like traveling through a warm, sticky blanket that clings to your skin, making outdoor activities a bit uncomfortable and prompting you to seek out shaded areas or cool breezes.

September Average Humidity in Atlantis

This chart illustrates the average monthly humidity levels in Atlantis, 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 Atlantis is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec62%62%70%72%77%82%82%78%74%67%61%60%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Atlantis

In Atlantis in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Atlantis.

Maximum UV Index Levels in Atlantis for September

The chart shows the monthly maximum UV Index (UVI) for Atlantis 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 Atlantis typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311854469111214
Data source: Atlantis 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 Atlantis Compares to Other Months

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

This table compares monthly weather conditions in Atlantis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)9 mm (0.3 inches)62%extreme
February Weather23°C (73°F)6 mm (0.2 inches)62%extreme
March Weather21°C (70°F)14 mm (0.5 inches)70%extreme
April Weather18°C (65°F)18 mm (0.7 inches)72%very high
May Weather15°C (60°F)39 mm (1.5 inches)77%moderate
June Weather13°C (56°F)74 mm (2.9 inches)82%moderate
July Weather12°C (54°F)71 mm (2.8 inches)82%moderate
August Weather12°C (54°F)50 mm (2.0 inches)78%high
September Weather15°C (59°F)27 mm (1.1 inches)74%very high
October Weather18°C (64°F)22 mm (0.9 inches)67%extreme
November Weather19°C (67°F)28 mm (1.1 inches)61%extreme
December Weather21°C (70°F)17 mm (0.7 inches)60%extreme

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