December in Saint Paul averages a daily high of -1.4°C with nights around -9.1°C. Expect roughly 5.4 wet days totalling 18.2mm. A hard month to visit for comfort alone.
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. 29 years of December data.