August in Lenexa averages a daily high of 30.7°C with nights around 19.8°C. Expect roughly 8.9 wet days totalling 117.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lenexa is September–October.
Based on OLATHE JOHNSON CO EXECUTIVE AIRPORT, KS US (11.5km), 1995–2024. 29 years of August data.