March in Shiojiri averages a daily high of 10.1°C. Expect roughly 8.8 wet days totalling 94.2mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Shiojiri is May–June.
Based on SUWA, JA (14.6km), 1995–2024. 29 years of March data.