December in Shiogama averages a daily high of 8.5°C. Expect roughly 8.1 wet days totalling 52.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Shiogama is May–June.
Based on SENDAI, JA (12.9km), 1995–2024. 21 years of December data.