June in Tri-Cities averages a daily high of 29°C with nights around 11.7°C. Expect roughly 4.7 wet days totalling 15.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Tri-Cities is April–May.
Based on PASCO TRI CITIES AIRPORT, WA US (6.6km), 1995–2024. 27 years of June data.