May in Rengasdengklok averages a daily high of 33°C with nights around 26.8°C. Expect roughly 3 wet days totalling 5.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Rengasdengklok is July–January.
Based on JAKARTA TANJUNG PRIOK, ID (48.1km), 1995–2024. 14 years of May data.