June in Grand Junction averages a daily high of 31.4°C with nights around 15.2°C. Expect roughly 3.2 wet days totalling 13mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Grand Junction is April–May.
Based on GRAND JUNCTION 6 ESE, CO US (7.7km), 1995–2024. 29 years of June data.