September in Joplin averages a daily high of 28.4°C with nights around 15.8°C. Expect roughly 7 wet days totalling 87.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Joplin is September–October.
Based on JOPLIN REGIONAL AIRPORT, MO US (7.7km), 1995–2024. 30 years of September data.