December in Lee's Summit averages a daily high of 5.2°C with nights around -4.7°C. Expect roughly 6.3 wet days totalling 35.5mm. A hard month to visit for comfort alone.
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. 14 years of December data.