December in Baton Rouge averages a daily high of 18.3°C with nights around 6.5°C. Expect roughly 9.5 wet days totalling 144.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Baton Rouge is February–April.
Based on BATON ROUGE METRO AIRPORT, LA US (11.2km), 1995–2024. 30 years of December data.