April in Tomakomai averages a daily high of 10°C. Expect roughly 10.9 wet days totalling 81.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Tomakomai is June–September.
Based on TOMAKOMAI, JA (4.9km), 1995–2024. 25 years of April data.