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September Weather in Retreat, South Africa

Last updated: August 31, 2025

In September, the average temperature in Retreat, South Africa hovers around 15°C (59°F). You can expect it to dip to a minimum of 9°C (48°F) and potentially rise to a warm 28°C (82°F). Be prepared for around 45 mm (1.8 in) of precipitation spread over 8 days, with an average humidity level of 76%.

September Temperature in Retreat

In September in Retreat, the average temperature is 15°C (59°F), with maximums reaching 28°C (82°F) and minimums dropping to as low as 9°C (48°F). This moderate climate makes Retreat an ideal destination for travelers seeking pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Retreat, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Retreat, September typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (82°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec686866636058575658616366
Data source: Temperature data for Retreat 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 Retreat

In Retreat in September, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.

September Precipitation Trends in Retreat

The chart displays monthly precipitation patterns in Retreat, 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 Retreat, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1410243063103957545413326
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Retreat

In Retreat in September humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

September Average Humidity in Retreat

This chart illustrates the average monthly humidity levels in Retreat, 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 Retreat is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%80%81%80%78%79%80%77%76%77%75%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Retreat

In Retreat 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 Retreat.

Maximum UV Index Levels in Retreat for September

The chart shows the monthly maximum UV Index (UVI) for Retreat 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 Retreat typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311853469111214
Data source: Retreat 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 Retreat Compares to Other Months

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

This table compares monthly weather conditions in Retreat, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)14 mm (0.6 inches)77%extreme
February Weather20°C (68°F)10 mm (0.4 inches)80%extreme
March Weather19°C (66°F)24 mm (1.0 inches)81%extreme
April Weather17°C (63°F)30 mm (1.2 inches)80%very high
May Weather16°C (60°F)63 mm (2.5 inches)78%moderate
June Weather14°C (58°F)103 mm (4.1 inches)79%moderate
July Weather14°C (57°F)95 mm (3.7 inches)80%moderate
August Weather13°C (56°F)75 mm (3.0 inches)77%high
September Weather15°C (59°F)45 mm (1.8 inches)76%very high
October Weather16°C (61°F)41 mm (1.6 inches)77%extreme
November Weather17°C (64°F)33 mm (1.3 inches)75%extreme
December Weather19°C (66°F)26 mm (1.0 inches)77%extreme

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