May in Erie averages a daily high of 19.8°C with nights around 9.8°C. Expect roughly 13.4 wet days totalling 93mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Erie is May–September.
Based on ERIE INTERNATIONAL AIRPORT, PA US (9.7km), 1995–2024. 30 years of May data.