December in Fargo averages a daily high of -4.3°C with nights around -13.2°C. Expect roughly 10 wet days totalling 27.2mm. A hard month to visit for comfort alone.
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 December data.