June in Sioux Falls averages a daily high of 27°C with nights around 14.5°C. Expect roughly 11.5 wet days totalling 102.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sioux Falls is August–September.
Based on SIOUX FALLS FOSS FIELD, SD US (4.9km), 1995–2024. 30 years of June data.