December in Houston averages a daily high of 19.2°C with nights around 9°C. Expect roughly 8.9 wet days totalling 100.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Houston is February–April.
Based on HOUSTON WILLIAM P HOBBY AIRPORT, TX US (15.2km), 1995–2024. 30 years of December data.