Byron Bay Weather in December
December in Byron Bay typically sees daytime highs of 27°C (81°F) and nighttime lows of 21°C (70°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Byron Bay in December
Typically around 12 days of rainfall are expected, averaging 120 mm (4.7 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Byron Bay in December
Byron Bay in December gets highs of 27°C (81°F) during the day and drops to 21°C (70°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights remain mild at 21°C (70°F), making evenings a pleasant time to be outdoors.
Sunshine in Byron Bay in December
The city usually sees around 250 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Average water temperature in December
At 25°C (77°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.December in Byron Bay has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Byron Bay's climate page.
Byron Bay Temperature in December
Min Temperature
21°C (70°F)
Max Temperature
27°C (81°F)
Water Temperature
25°C (77°F)
Chance of Rain
39%
Precipitation
120 mm (4.7 in)
Rainy days
12 days
Sunshine
250 hours
Percentage Sunshine
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Byron Bay typically stay consistent throughout December, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 20°C (68°F).
Average temperatures in December
Daily Historical Precipitation
43-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Byron Bay in December
Browse day-by-day weather records for Byron Bay spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Byron Bay historical weather extremes in December
Based on 35 years of weather observations in Byron Bay between 1990 and 2025, these are the recorded extremes.
- The warmest day in December was on December 24, 2001, with a maximum of 37°C (99°F).
- The coldest December day was on December 2, 1994, with a maximum of 19°C (66°F).
- The coldest night in December in Byron Bay was on December 6, 2019, with a minimum of 12°C (54°F).
Best Places in Australia in December
Find out more about the weather in Australia and which places have the best travel conditions in this month. See all of Australia in December →
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What to Wear in Byron Bay in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 25°C (77°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Byron Bay in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Byron Bay's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Byron Bay climate overview or explore weather in Australia.
