May in Fort Smith averages a daily high of 27.3°C with nights around 15.7°C. Expect roughly 10.8 wet days totalling 144.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Fort Smith is April–May.
Based on FORT SMITH REGIONAL AIRPORT, AR US (6.6km), 1995–2024. 30 years of May data.