September in Stavanger averages a daily high of 16.6°C with nights around 10.6°C. Expect roughly 18.2 wet days totalling 167.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Stavanger is June–August.
Based on STAVANGER VALAND, NO (1.5km), 1995–2024. 17 years of September data.