December in Overland Park averages a daily high of 6.3°C with nights around -3.5°C. Expect roughly 5.4 wet days totalling 32.7mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Overland Park is September–October.
Based on OLATHE JOHNSON CO EXECUTIVE AIRPORT, KS US (15.9km), 1995–2024. 29 years of December data.