April in Lahr averages a daily high of 16.7°C with nights around 4.8°C. Expect roughly 11.6 wet days totalling 56.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lahr is May–September.
Based on LAHR, GM (4.1km), 1995–2024. 30 years of April data.