January in Phuket averages a daily high of 32.6°C with nights around 25.1°C. Expect roughly 3 wet days totalling 25.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Phuket is January–February.
Based on PHUKET, TH (0.9km), 1995–2024. 17 years of January data.