December in Sinan averages a daily high of 8.3°C with nights around 0.8°C. Expect roughly 6.4 wet days totalling 30.4mm. 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. 17 years of December data.