May in Pori averages a daily high of 14.6°C with nights around 4.1°C. Expect roughly 10.4 wet days totalling 39.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Pori is June–August.
Based on PORI PORIN LENTOASEMA, FI (1.8km), 1995–2024. 21 years of May data.