September in Syracuse averages a daily high of 23.5°C with nights around 11.9°C. Expect roughly 10.6 wet days totalling 82.4mm. Comfortable conditions for being outdoors all day.
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 September data.