January in Sinan averages a daily high of 5.8°C with nights around -1.2°C. Expect roughly 7 wet days totalling 34mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Sinan is September–October.
Based on MOKPO, KS (25.1km), 1995–2024. 18 years of January data.