March in Dayton averages a daily high of 10.9°C with nights around 0°C. Expect roughly 11.2 wet days totalling 93.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Dayton is September–October.
Based on DAYTON MCD, OH US (2.5km), 1995–2024. 26 years of March data.