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September in Oulu averages a daily high of 13.4°C with nights around 8.2°C. Generally workable, with some weather to plan around.
Across the year, the best time to visit Oulu is July–August.
Based on OULU VIHREASAARI, FI (3.4km), 1995–2024. 28 years of September data.
See all twelve months for Oulu →