September in Palu averages a daily high of 33.6°C with nights around 22.9°C. Expect roughly 3.2 wet days totalling 43mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Palu is February–December.
Based on MUTIARA, ID (4.5km), 1995–2024. 26 years of September data.