December in Cypress averages a daily high of 18.6°C with nights around 6.7°C. Expect roughly 10.3 wet days totalling 87.5mm. Comfortable conditions for being outdoors all day.
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 December data.