September in Lasnamäe averages a daily high of 16.3°C with nights around 8.6°C. Expect roughly 12.3 wet days totalling 57.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lasnamäe is June–August.
Based on TALLINN, EN (15.1km), 1995–2024. 29 years of September data.