January in Grand Junction averages a daily high of 4.6°C with nights around -6.7°C. Expect roughly 4.5 wet days totalling 11.1mm. A hard month to visit for comfort alone.
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 January data.