May in Salo averages a daily high of 16.4°C with nights around 4.7°C. Expect roughly 8.6 wet days totalling 36.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Salo is June–August.
Based on SALO KARKKA, FI (1.5km), 1995–2024. 30 years of May data.