September in Tomakomai averages a daily high of 22.1°C. Expect roughly 11.4 wet days totalling 161mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Tomakomai is June–September.
Based on TOMAKOMAI, JA (4.9km), 1995–2024. 25 years of September data.