May in Syracuse averages a daily high of 21.1°C with nights around 8.7°C. Expect roughly 13 wet days totalling 82.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Syracuse is May–September.
Based on SYRACUSE HANCOCK INTERNATIONAL AIRPORT, NY US (7.8km), 1995–2024. 30 years of May data.