South Australia weather in December 2025

Expect 26°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in South Australia in December. Check more long-term weather averages for South Australia in December before you book your next holiday to South Australia in 2025/2026.

  • 26°C maximum daytime temperature in December in South Australia (Adelaide)26
    26°C max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in December in South Australia (Adelaide)6
    6 days with some rainfall
  • 14°C minimum night-time temperature in December in South Australia (Adelaide)14
    14°C min night temperature
  • 14 hours of daylight per day in December in South Australia (Adelaide)14
    14 hours of daylight per day
  • Low heat & humidity in December in South Australia (Adelaide)L
    Low heat & humidity
  • 27 mm monthly rainfall in December in South Australia (Adelaide)27
    27 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in South Australia (Adelaide)11
    11+ (Extreme) UV index
  • 20°C sea temperature in December in South Australia (Adelaide)20
    20°C sea temperature

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The December 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 December. 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 December?

Daytime temperatures usually reach 26°C in Adelaide, South Australia in December with low heat and humidity, falling to 14°C at night.

How sunny is it in South Australia in December?

There are normally 9 hours of bright sunshine each day in Adelaide, South Australia in December - that's 64% of daylight hours.

How warm is the sea around South Australia in December?

The average sea temperature around Adelaide, South Australia in December is 20°C.

Does it rain in South Australia in December?

There are usually 6 days with some rain in Adelaide, South Australia in December and the average monthly rainfall is 27mm.

South Australia December sunrise & sunset times

Browse the sunrise and sunset times for South Australia in December 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 December 2025 04:55 19:14
Tuesday, 16th December 2025 04:56 19:26
Wednesday, 31st December 2025 05:04 19:32

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