October in Shoreline averages a daily high of 16°C with nights around 8.3°C. Expect roughly 15 wet days totalling 97.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Shoreline is July–August.
Based on SEATTLE SAND POINT WEATHER FORECAST OFFICE, WA US (10km), 1995–2024. 28 years of October data.