May in Springfield averages a daily high of 22.4°C with nights around 10°C. Expect roughly 14.8 wet days totalling 123.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Springfield is August–October.
Based on SPRINGFIELD WATER TREATMENT PLANT, OH US (5.5km), 1995–2024. 28 years of May data.