January in Jamaica averages a daily high of 4.5°C with nights around -2.7°C. Expect roughly 10.9 wet days totalling 85.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Jamaica is August–October.
Based on JFK INTERNATIONAL AIRPORT, NY US (6.8km), 1995–2024. 30 years of January data.