May in Fargo averages a daily high of 20.4°C with nights around 7.2°C. Expect roughly 11.5 wet days totalling 81.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Fargo is May–September.
Based on FARGO HECTOR INTERNATIONAL AIRPORT, ND US (5.5km), 1995–2024. 30 years of May data.