January in Galveston averages a daily high of 16.9°C with nights around 9.7°C. Expect roughly 9.7 wet days totalling 91.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Galveston is March–May.
Based on GALVESTON SCHOLES FIELD, TX US (7.3km), 1995–2024. 28 years of January data.