Adelaide weather in December 2025

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

  • 26°C maximum daytime temperature in December in Adelaide26
    26°C max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in December in Adelaide6
    6 days with some rainfall
  • 14°C minimum night-time temperature in December in Adelaide14
    14°C min night temperature
  • 14 hours of daylight per day in December in Adelaide14
    14 hours of daylight per day
  • Low heat & humidity in December in AdelaideL
    Low heat & humidity
  • 27 mm monthly rainfall in December in Adelaide27
    27 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in Adelaide11
    11+ (Extreme) UV index
  • 20°C sea temperature in December in Adelaide20
    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.

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

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More about Australia

How hot is it in Adelaide in December?

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

How sunny is it in Adelaide in December?

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

How warm is the sea around Adelaide in December?

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

Does it rain in Adelaide in December?

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

Adelaide December sunrise & sunset times

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

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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