December in Lahr averages a daily high of 6.2°C with nights around 0.4°C. Expect roughly 14.7 wet days totalling 55.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Lahr is May–September.
Based on LAHR, GM (4.1km), 1995–2024. 30 years of December data.