December in Caloundra averages a daily high of 28.4°C with nights around 20°C. Expect roughly 11.6 wet days totalling 155.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Caloundra is June–November.
Based on MAROOCHYDORE AERO, AS (22.8km), 1995–2024. 30 years of December data.