September in Irvington averages a daily high of 25.8°C with nights around 16.1°C. Expect roughly 8.4 wet days totalling 117.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Irvington is May–June.
Based on HARRISON, NJ US (7.2km), 1995–2024. 28 years of September data.