Mullumbimby Weather Forecast
- 18
- 27
Partly cloudy
- 21
- 29
Partly cloudy
- 20
- 31
Shower or two
- 21
- 24
Shower or two. Windy
- 19
- 24
Possible shower
- 17
- 25
Partly cloudy
- 16
- 28
Mostly sunny
Today 13 Dec Northern Rivers
Partly cloudy. The chance of fog in the early morning. Slight chance of a shower in the morning and afternoon. The chance of a thunderstorm in the afternoon and early evening. Light winds becoming northeasterly 15 to 25 km/h in the early afternoon then becoming light in the evening. Overnight temperatures falling to around 18 with daytime temperatures reaching around 30.
Mullumbimby Temperature Statistics View More
December Temperature
Cape Byron (16km)
Lowest 3 December, 2025
16.6 °CAverage December
23 °CHighest 10 December, 2025
31 °C
Climate (2020–Present)
Cape Byron (16km)
Average Low 2020–2025
17.3 °CAverage 2020–2025
20.2 °CAverage High 2020–2025
23.7 °C