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May in Joensuu averages a daily high of 12.5°C with nights around 5.3°C. Generally workable, with some weather to plan around.
Across the year, the best time to visit Joensuu is June–August.
Based on LIPERI TUISKAVANLUOTO, FI (7.8km), 1995–2024. 27 years of May data.
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