December in New Braunfels averages a daily high of 18.8°C with nights around 5.6°C. Expect roughly 6.4 wet days totalling 43.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit New Braunfels is October–April.
Based on NEW BRAUNFELS MUNICIPAL AIRPORT, TX US (9.3km), 1995–2024. 29 years of December data.