September in Luleå averages a daily high of 13.1°C with nights around 6.5°C. Expect roughly 11.7 wet days totalling 62.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Luleå is June–August.
Based on LULEA BERGNASET, SW (2.1km), 1995–2024. 17 years of September data.