December in Burien averages a daily high of 7.8°C with nights around 2.6°C. Expect roughly 18.7 wet days totalling 149.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Burien is July–August.
Based on SEATTLE TACOMA AIRPORT, WA US (3.8km), 1995–2024. 30 years of December data.