December in Nusantara averages a daily high of 31.4°C with nights around 23.9°C. Expect roughly 10 wet days totalling 131mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nusantara is July–September.
Based on SEPINGGAN, ID (38.7km), 1995–2024. 13 years of December data.