September in Banjarbaru averages a daily high of 33.7°C with nights around 22.3°C. Expect roughly 5 wet days totalling 60.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Banjarbaru is March–April.
Based on SYAMSUDIN NOOR, ID (8.2km), 1995–2024. 15 years of September data.