December in League City averages a daily high of 18.7°C with nights around 8.1°C. Expect roughly 10.1 wet days totalling 113.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit League City is February–May.
Based on HOUSTON NATIONAL WEATHER SERVICE OFFICE, TX US (4.1km), 1995–2024. 30 years of December data.