December in Marysville averages a daily high of 8.2°C with nights around 1.4°C. Expect roughly 19.3 wet days totalling 133.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Marysville is July–August.
Based on EVERETT, WA US (8.6km), 1995–2024. 23 years of December data.