March in Kennewick averages a daily high of 14.6°C with nights around 2.4°C. Expect roughly 7.6 wet days totalling 16.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kennewick is May–June.
Based on KENNEWICK, WA US (2.8km), 1995–2024. 30 years of March data.