August in Tomakomai averages a daily high of 24.2°C. Expect roughly 14.2 wet days totalling 205mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Tomakomai is June–September.
Based on TOMAKOMAI, JA (4.9km), 1995–2024. 19 years of August data.