September in Lee's Summit averages a daily high of 26.1°C with nights around 14°C. Expect roughly 8.7 wet days totalling 106.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lee's Summit is April–June.
Based on LEES SUMMIT REED WLR, MO US (4km), 1995–2024. 16 years of September data.