May in Saint Paul averages a daily high of 20.9°C with nights around 9.6°C. Expect roughly 12 wet days totalling 99.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Saint Paul is May–June.
Based on ST. PAUL DOWNTOWN AIRPORT, MN US (3.2km), 1995–2024. 25 years of May data.