January in Lahr averages a daily high of 5.4°C with nights around -0.7°C. Expect roughly 14.1 wet days totalling 48.7mm. 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 January data.