June in Rayong averages a daily high of 33.8°C with nights around 26.1°C. Expect roughly 13.3 wet days totalling 176mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Rayong is December–March.
Based on SATTAHIP, TH (29.8km), 1995–2024. 22 years of June data.