January in Jiayuguan averages a daily high of -1.3°C with nights around -14.9°C. Rain is rare — about 1.7 wet days and 1.9mm across the month. A hard month to visit for comfort alone.
Across the year, the best time to visit Jiayuguan is April–June.
Based on JIUQUAN, CH (17.5km), 1995–2024. 25 years of January data.