September in Takasaki averages a daily high of 27.6°C. Expect roughly 12.8 wet days totalling 187.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Takasaki is September–November.
Based on MAEBASHI, JA (8.7km), 1995–2024. 21 years of September data.