South Africa weather in September 2025

Expect daytime maximum temperatures of 18°C in South Africa in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 96 mm of rainfall in the month.

  • 18°C maximum daytime temperature in September in South Africa (Cape Town)18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in September in South Africa (Cape Town)11
    11 days with some rainfall
  • 9°C minimum night-time temperature in September in South Africa (Cape Town)9
    9°C min night temperature
  • 12 hours of daylight per day in September in South Africa (Cape Town)12
    12 hours of daylight per day
  • No heat & humidity in September in South Africa (Cape Town)0
    No heat & humidity
  • 96 mm monthly rainfall in September in South Africa (Cape Town)96
    96 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in South Africa (Cape Town)6
    6 (High) UV index
  • 15°C sea temperature in September in South Africa (Cape Town)15
    15°C sea temperature

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The September weather guide for South Africa (Cape Town) 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.

Top South Africa destinations

Below are average maximum temperatures at popular countries, regions and places in South Africa in September. Select a holiday destination to see more weather parameters.

All South Africa destinations

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

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More about South Africa

How hot is it in South Africa in September?

Daytime temperatures usually reach 18°C in Cape Town, South Africa in September, falling to 9°C at night.

How sunny is it in South Africa in September?

There are normally 7 hours of bright sunshine each day in Cape Town, South Africa in September - that's 62% of daylight hours.

How warm is the sea around South Africa in September?

The average sea temperature around Cape Town, South Africa in September is 15°C.

Does it rain in South Africa in September?

There are usually 11 days with some rain in Cape Town, South Africa in September and the average monthly rainfall is 96mm.

South Africa September sunrise & sunset times

Browse the sunrise and sunset times for South Africa in September 2025. Select a month to view South Africa sunrise and sunset times for the next 12 months. The South Africa sunrise and sunset times shown below are for Cape Town.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 07:04 18:28
Monday, 15th September 2025 06:45 18:38
Tuesday, 30th September 2025 06:24 18:49

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