August in Chiang Mai averages a daily high of 32.1°C. Expect roughly 23.1 wet days totalling 239mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Chiang Mai is December–January.
Based on CHIANG MAI, TH (0.8km), 1995–2024. 13 years of August data.