August in Jena averages a daily high of 25.8°C with nights around 13.6°C. Expect roughly 12.1 wet days totalling 70.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Jena is May–September.
Based on JENA STERNWARTE, GM (0.5km), 1995–2024. 30 years of August data.