Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The arrival of December in Byron Bay brings an average high-temperature of a still warm 25.5°C (77.9°F), closely following the temperature pattern of November. Nights in December showcase an average temperature of 20.8°C (69.4°F), slightly cooler than the daytime.Humidity
In December, the average relative humidity in Byron Bay is 77%.Rainfall
In December, in Byron Bay, the rain falls for 18.6 days. Throughout December, 79mm (3.11") of precipitation is accumulated. In Byron Bay, during the entire year, the rain falls for 197.8 days and collects up to 867mm (34.13") of precipitation.Sea temperature
In Byron Bay, in December, the average water temperature is 25.3°C (77.5°F).Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.
Daylight
December has the longest days of the year, with an average of 13h and 54min of daylight.On the first day of December, sunrise is at 5:39 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 7:46 pm AEDT.
Sunshine
In Byron Bay, the average sunshine in December is 9.6h.UV index
The months with the highest UV index are January through March, October through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 6 translates into these guidelines:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Byron Bay?
What is the average humidity in December in Byron Bay?
How many days does it rain in December in Byron Bay?
How warm is the water in December in Byron Bay?
When are the longest days in Byron Bay?
What is the average length of the day in December in Byron Bay?
When is the sunrise / sunset in December in Byron Bay?
How long on average sun shines in December in Byron Bay?
When is the highest UV index in Byron Bay?
What is the UV index intensity in December in Byron Bay?
Average temperature in December
Byron Bay, Australia
- Average high temperature in December: 25.5°C
The warmest month (with the highest average high temperature) is January (26.5°C).
The month with the lowest average high temperature is July (18.3°C).
- Average low temperature in December: 20.8°C
The months with the highest average low temperature are January and February (21.8°C).
The coldest month (with the lowest average low temperature) is July (13.3°C).
Average pressure in December
Byron Bay, Australia
- Average pressure in December: 1013.6mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is January (1012.8mbar).
Average wind speed in December
Byron Bay, Australia
- Average wind speed in December: 17.4km/h
The windiest month (with the highest average wind speed) is October (18km/h).
The calmest month (with the lowest average wind speed) is May (15.3km/h).
Average humidity in December
Byron Bay, Australia
- Average humidity in December: 77%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
Byron Bay, Australia
- Average rainfall in December: 79mm
The wettest month (with the highest rainfall) is February (123mm).
The driest month (with the least rainfall) is September (29mm).
Average rainfall days in December
Byron Bay, Australia
- Average rainfall days in December: 18.6 days
The month with the highest number of rainy days is March (23.1 days).
The month with the least rainy days is September (10.5 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: 13h and 5min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 24min).
- Average sunshine in December: 9h and 4min
The month with the most sunshine is November (Average sunshine: 10h and 30min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).
Average sunshine days in December
Byron Bay, Australia
- Average sunshine days in December: 9.3 days
The month with the most sunshine days is August (17.3 days).
The month with the least sunshine days is March (5.8 days).
Average UV index in December
Byron Bay, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February, March, October, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July, August and September (UV index 5).
Average cloud cover in December
Byron Bay, Australia
- Average cloud cover in December: 39
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in December
Byron Bay, Australia
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
