May in Youngstown averages a daily high of 21.5°C with nights around 8.9°C. Expect roughly 14.1 wet days totalling 102.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Youngstown is May–September.
Based on YOUNGSTOWN WARREN REGIONAL AIRPORT, OH US (17.3km), 1995–2024. 30 years of May data.