December in Kansas City averages a daily high of 6.8°C with nights around -2.7°C. Expect roughly 4.5 wet days totalling 36.9mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Kansas City is April–May.
Based on KANSAS CITY DOWNTOWN AIRPORT, MO US (3.6km), 1995–2024. 30 years of December data.