May in Galveston averages a daily high of 28.4°C with nights around 22.7°C. Expect roughly 5.8 wet days totalling 75.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Galveston is March–May.
Based on GALVESTON SCHOLES FIELD, TX US (7.3km), 1995–2024. 27 years of May data.