Byron Bay
Australia
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Byron Bay, Australia

December, the first month of the summer, in Byron Bay, is still a warm month, with average temperature varying between 27°C (80.6°F) and 19°C (66.2°F).

Temperature

In Byron Bay, the average high-temperature in December is practically the same as in November - a still warm 27°C (80.6°F). The average low-temperature, in Byron Bay, is 19°C (66.2°F).

Rainfall

In Byron Bay, during December, the rain falls for 12 days and regularly aggregates up to 159mm (6.3") of precipitation. Throughout the year, in Byron Bay, there are 134 rainfall days, and 1833mm (72.2") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature is 25.3°C (77.5°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The month with the longest days in Byron Bay is December, with an average of 13.9h of daylight.

Sunshine

In Byron Bay, the average sunshine is 8h.

UV index

Months with the highest UV index in Byron Bay are January, February and December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to the Sun's UV rays for the average person.
The average daily UV index of 12 transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in December in Byron Bay?

The average high-temperature, in December, in Byron Bay, Australia, is 27°C (80.6°F), while the average low-temperature is 19°C (66.2°F).

How many days does it rain in December in Byron Bay?

In Byron Bay, Australia, in December, during 12 rainfall days, 159mm (6.3") of precipitation is typically accumulated.

How warm is the water in December in Byron Bay?

In December, the average sea temperature in Byron Bay is 25.3°C (77.5°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

When are the longest days in Byron Bay?

December has the longest days of the year in Byron Bay, with an average of 13.9h of daylight.

What is the average length of the day in December in Byron Bay?

In December, the average length of the day in Byron Bay is 13.9h.

How long on average sun shines in December in Byron Bay?

In Byron Bay, the average sunshine in December is 8h.

What are the months with the highest UV index in Byron Bay?

January, February and December, with an average maximum UV index of 12, are months with the highest UV index in Byron Bay.

How high is the UV index in December in Byron Bay?

In Byron Bay, the average daily maximum UV index in December is 12. A UV Index value of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in December - Byron Bay, Australia
  • Average high temperature in December: 27°C

The warmest month (with the highest average high temperature) is January (28°C).
Months with the lowest average high temperature are June and July (20°C).

  • Average low temperature in December: 19°C

Months with the highest average low temperature are January and February (20°C).
The coldest month (with the lowest average low temperature) is July (9°C).

Average rainfall in December - Byron Bay, Australia
  • Average rainfall in December: 159mm

The wettest month (with the highest rainfall) is March (239mm).
The driest month (with the lowest rainfall) is September (62mm).

Average rainfall days in December - Byron Bay, Australia
  • Average rainfall days in December: 12 days

Months with the highest number of rainy days are February and March (14 days).
The month with the lowest number of rainy days is September (8 days).

Average sea temperature in December - Byron Bay, Australia
  • Average sea temperature in December: 25.3°C

The best month for swimming (with the highest average sea temperature) is February (27.2°C).
The coldest month (with the lowest average sea temperature) is August (21.5°C).

Average daylight in December / Average sunshine in December - Byron Bay, Australia
  • Average daylight in December: 13.9h

The month with the longest days is December (Average daylight: 13.9h).
The month with shortest days is June (Average daylight: 10.3h).

  • Average sunshine in December: 8h

The month with most sunshine is September (Average sunshine: 9h).
The month with least sunshine is May (Average sunshine: 6h).

Average UV index in December - Byron Bay, Australia
  • Average UV index in December: 12

Months with the highest UV index are January, February and December (UV index 12).
The month with the lowest UV index is June (UV index 3).