Johannesburg weather in September 2025

Expect daytime maximum temperatures of 23°C in Johannesburg, South Africa in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 23°C maximum daytime temperature in September in Johannesburg23
    23°C max day temperature
  • 10 hours of sunshine per day
  • 3 days with some rainfall in September in Johannesburg3
    3 days with some rainfall
  • 9°C minimum night-time temperature in September in Johannesburg9
    9°C min night temperature
  • 12 hours of daylight per day in September in Johannesburg12
    12 hours of daylight per day
  • No heat & humidity in September in Johannesburg0
    No heat & humidity
  • 28 mm monthly rainfall in September in Johannesburg28
    28 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Johannesburg9
    9 (Very High) UV index

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The September weather guide for South Africa (Johannesburg) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about South Africa

How hot is it in Johannesburg in September?

Daytime temperatures usually reach 23°C in Johannesburg in September, falling to 9°C at night.

How sunny is it in Johannesburg in September?

There are normally 10 hours of bright sunshine each day in Johannesburg in September - that's 81% of daylight hours.

Does it ever rain in Johannesburg in September?

There are usually 3 days with some rain in Johannesburg in September and the average monthly rainfall is 28mm.

Johannesburg September sunrise & sunset times

Browse the sunrise and sunset times for Johannesburg in September 2025. Select a month to view Johannesburg sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:20 17:56
Monday, 15th September 2025 06:05 18:01
Tuesday, 30th September 2025 05:48 18:07

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