December in Lafayette averages a daily high of 18.4°C with nights around 7.5°C. Expect roughly 9.6 wet days totalling 132.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lafayette is February–April.
Based on LAFAYETTE REGIONAL AIRPORT, LA US (4.1km), 1995–2024. 30 years of December data.