September in Phan Thiết averages a daily high of 31.7°C. Expect roughly 16.3 wet days totalling 185.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Phan Thiết is December–March.
Based on PHAN THIET, VM (0.5km), 1995–2024. 18 years of September data.