October in Kennewick averages a daily high of 18.8°C with nights around 6.5°C. Expect roughly 6.3 wet days totalling 17.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kennewick is May–June.
Based on KENNEWICK, WA US (2.8km), 1995–2024. 29 years of October data.