July in Saint Joseph averages a daily high of 31.1°C with nights around 19.6°C. Expect roughly 9.4 wet days totalling 99.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Saint Joseph is April–May.
Based on ST JOSEPH ROSECRANS MEMORIAL AIRPORT, MO US (5.4km), 1995–2024. 27 years of July data.