September in Edison averages a daily high of 26°C with nights around 13.9°C. Expect roughly 9 wet days totalling 115.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Edison is May–June.
Based on NEW BRUNSWICK 3 SE, NJ US (5.2km), 1995–2024. 30 years of September data.