September in Liepāja averages a daily high of 17.1°C with nights around 10.2°C. Expect roughly 9 wet days totalling 64.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Liepāja is June–September.
Based on LIEPAJA, LG (2.4km), 1995–2024. 21 years of September data.