May in Sibolga averages a daily high of 32.5°C with nights around 22.2°C. Expect roughly 6.6 wet days totalling 102.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sibolga is December–July.
Based on SIBOLGA PINANGSORI, ID (24km), 1995–2024. 20 years of May data.