August in Edison averages a daily high of 29.5°C with nights around 17.9°C. Expect roughly 10.5 wet days totalling 118.9mm. Generally workable, with some weather to plan around.
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 August data.