Byron Bay weather in December 2025

Expect 27°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Byron Bay in December. Check more long-term weather averages for Byron Bay in December before you book your next holiday to New South Wales in 2025/2026.

  • 27°C maximum daytime temperature in December in Byron Bay27
    27°C max day temperature
  • 8 hours of sunshine per day
  • 12 days with some rainfall in December in Byron Bay12
    12 days with some rainfall
  • 19°C minimum night-time temperature in December in Byron Bay19
    19°C min night temperature
  • 14 hours of daylight per day in December in Byron Bay14
    14 hours of daylight per day
  • Low heat & humidity in December in Byron BayL
    Low heat & humidity
  • 159 mm monthly rainfall in December in Byron Bay159
    159 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in Byron Bay11
    11+ (Extreme) UV index
  • 24°C sea temperature in December in Byron Bay24
    24°C sea temperature

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The December weather guide for New South Wales (Byron Bay) 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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How hot is it in Byron Bay in December?

Daytime temperatures usually reach 27°C in Byron Bay in December with low heat and humidity, falling to 19°C at night.

How sunny is it in Byron Bay in December?

There are normally 8 hours of bright sunshine each day in Byron Bay in December - that's 60% of daylight hours.

How warm is the sea around Byron Bay in December?

The average sea temperature around Byron Bay in December is 24°C.

Does it rain in Byron Bay in December?

There are usually 12 days with some rain in Byron Bay in December and the average monthly rainfall is 159mm.

Byron Bay December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 04:40 18:29
Tuesday, 16th December 2025 04:42 18:40
Wednesday, 31st December 2025 04:50 18:47

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