January in Hamilton averages a daily high of 4.4°C with nights around -5.5°C. Expect roughly 10.9 wet days totalling 72.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Hamilton is September–October.
Based on HAMILTON BUTLER CO REGIONAL AIRPORT, OH US (5.5km), 1995–2024. 27 years of January data.