September in Tartu averages a daily high of 16.7°C with nights around 8.1°C. Expect roughly 12.3 wet days totalling 52.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Tartu is May–August.
Based on TARTU TORAVERE, EN (20.1km), 1995–2024. 30 years of September data.