South Australia weather in September 2025

Expect 18°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in South Australia in September. Check more long-term weather averages for South Australia in September before you book your next holiday to South Australia in 2025/2026.

  • 18°C maximum daytime temperature in September in South Australia (Adelaide)18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in South Australia (Adelaide)8
    8 days with some rainfall
  • 9°C minimum night-time temperature in September in South Australia (Adelaide)9
    9°C min night temperature
  • 12 hours of daylight per day in September in South Australia (Adelaide)12
    12 hours of daylight per day
  • No heat & humidity in September in South Australia (Adelaide)0
    No heat & humidity
  • 53 mm monthly rainfall in September in South Australia (Adelaide)53
    53 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in South Australia (Adelaide)5
    5 (Moderate) UV index
  • 14°C sea temperature in September in South Australia (Adelaide)14
    14°C sea temperature

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The September weather guide for South Australia (Adelaide) 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 Australia destinations

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

All South Australia destinations

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

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More about Australia

How hot is it in South Australia in September?

Daytime temperatures usually reach 18°C in Adelaide, South Australia in September, falling to 9°C at night.

How sunny is it in South Australia in September?

There are normally 7 hours of bright sunshine each day in Adelaide, South Australia in September - that's 59% of daylight hours.

How warm is the sea around South Australia in September?

The average sea temperature around Adelaide, South Australia in September is 14°C.

Does it rain in South Australia in September?

There are usually 8 days with some rain in Adelaide, South Australia in September and the average monthly rainfall is 53mm.

South Australia September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:35 17:57
Monday, 15th September 2025 06:15 18:07
Tuesday, 30th September 2025 05:54 18:18

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