September in Gävle averages a daily high of 16.4°C with nights around 6.7°C. Expect roughly 10.4 wet days totalling 48.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gävle is June–September.
Based on GAVLE A, SW (5.2km), 1995–2024. 30 years of September data.