May in Cypress averages a daily high of 30.3°C with nights around 19.5°C. Expect roughly 9.1 wet days totalling 139.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Cypress is February–April.
Based on HOUSTON HOOKS MEMORIAL AIRPORT, TX US (17.5km), 1995–2024. 27 years of May data.