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September Weather in Jansenville, South Africa

Last updated: August 31, 2025

In September, the average temperature in Jansenville, South Africa hovers around 17°C (62°F). However, temperatures can swing dramatically, with a minimum of 1°C (34°F) and reaching as high as 42°C (107°F). Expect around 20 mm (0.8 in) of precipitation over 2 days, and feel the average humidity linger at a comfortable 77%.

September Temperature in Jansenville

In September in Jansenville, the average temperature is 17°C (62°F). Maximum temperatures can reach 42°C (107°F), while minimums can drop to as low as 1°C (34°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates September temperature patterns in Jansenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jansenville, September typically has an average temperature of 17°C (62°F), with highs reaching up to 42°C (107°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec767572666158565662666972
Data source: Temperature data for Jansenville 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 Jansenville

In Jansenville in September, the precipitation amount is 20 mm (0.8 in) over the course of 2 days.

September Precipitation Trends in Jansenville

The chart displays monthly precipitation patterns in Jansenville, 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 Jansenville, September typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec264328301338920242543
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jansenville

In Jansenville in September humidity is 77%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, creating a lush, almost tropical atmosphere that can be quite stifling for traveling, making it essential to stay hydrated and take frequent breaks in the shade.

September Average Humidity in Jansenville

This chart illustrates the average monthly humidity levels in Jansenville, 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 Jansenville is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%84%85%83%79%77%68%77%72%73%73%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jansenville

In Jansenville in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Jansenville.

Maximum UV Index Levels in Jansenville for September

The chart shows the monthly maximum UV Index (UVI) for Jansenville 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 Jansenville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1514128644610111315
Data source: Jansenville 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 Jansenville Compares to Other Months

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

This table compares monthly weather conditions in Jansenville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)26 mm (1.0 inches)76%extreme
February Weather24°C (75°F)43 mm (1.7 inches)75%extreme
March Weather22°C (73°F)28 mm (1.1 inches)84%extreme
April Weather19°C (66°F)30 mm (1.2 inches)84%very high
May Weather16°C (62°F)13 mm (0.5 inches)83%high
June Weather14°C (58°F)3 mm (0.1 inches)79%moderate
July Weather13°C (56°F)8 mm (0.3 inches)77%moderate
August Weather14°C (57°F)9 mm (0.4 inches)68%high
September Weather17°C (62°F)20 mm (0.8 inches)77%very high
October Weather19°C (67°F)24 mm (1.0 inches)72%extreme
November Weather20°C (69°F)25 mm (1.0 inches)73%extreme
December Weather22°C (72°F)43 mm (1.7 inches)73%extreme

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