May in Grand Junction averages a daily high of 24.8°C with nights around 9.7°C. Expect roughly 4.7 wet days totalling 20.5mm. 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. 28 years of May data.