May in Spring averages a daily high of 30.5°C with nights around 20°C. Expect roughly 8.6 wet days totalling 136.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Spring is February–April.
Based on HOUSTON INTERCONTINENTAL AIRPORT, TX US (11.9km), 1995–2024. 30 years of May data.