January in Edison averages a daily high of 4.9°C with nights around -4.8°C. Expect roughly 11.1 wet days totalling 97.6mm. A hard month to visit for comfort alone.
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 January data.