October in Renton averages a daily high of 16.2°C with nights around 8.2°C. Expect roughly 14.2 wet days totalling 84.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Renton is July–August.
Based on RENTON MUNICIPAL AIRPORT, WA US (1.4km), 1995–2024. 25 years of October data.