February in Sammamish averages a daily high of 9.7°C with nights around 2.7°C. Expect roughly 16.1 wet days totalling 87.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Sammamish is July–August.
Based on SEATTLE SAND POINT WEATHER FORECAST OFFICE, WA US (14km), 1995–2024. 29 years of February data.