March in Olathe averages a daily high of 13.2°C with nights around 1.9°C. Expect roughly 9.2 wet days totalling 63.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Olathe is September–October.
Based on OLATHE JOHNSON CO EXECUTIVE AIRPORT, KS US (7.7km), 1995–2024. 28 years of March data.