August in Marysville averages a daily high of 24.3°C with nights around 12.8°C. Expect roughly 6.1 wet days totalling 26.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Marysville is July–August.
Based on EVERETT, WA US (8.6km), 1995–2024. 25 years of August data.