October in Mustamäe averages a daily high of 9.9°C with nights around 4.1°C. Expect roughly 16.4 wet days totalling 78mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Mustamäe is June–August.
Based on TALLINN, EN (4.5km), 1995–2024. 30 years of October data.