Based on the daily precipitation data of 7 national meteorological stations and 20 automatic meteorological stations in the Urumqi River Basin during the vegetation growth season from May to September) from 2013 to 2021, the variation characteristics of precipitation, precipitation days, precipitation with different levels and their contribution rates to total precipitation with altitude are analyzed. It is expected to provide some references for water resources utilization, eco-environmental treatment and protection in the basin. The results show that both precipitation and precipitation days in the Urumqi River Basin presented a fluctuating and increasing trend with elevation at a rate of 17.4 mm·(100 m)-1 and 2.85 d·(100 m)-1, respectively, and the dependence on altitude changed from weak to strong with an altitude of about 1 000 m as a boundary. The high precipitation zones appear in the elevation about 1 200 m and 2 000 m and show a rule of gradual rise from the lower mountain area to the mid-alpine zone and then fall back. The high values of precipitation days are stability and always in the mid-alpine zone (above 1 800 m). The monthly variation characteristics of precipitation days and precipitation in the vegetation growth season are in good agreement, and both are increasing with elevation. In areas below 2 200 m, precipitation in June and precipitation days in July increased most significantly with elevation at a rate of 4.8 mm·(100 m)-1 and 0.72 d·(100 m)-1, and in September the increasing rate of both are 1.1 mm·(100 m)-1 and 0.37 d·(100 m)-1, respectively. The occurring times of light moderate and heavy rainfall in the growth season of vegetation is strongly altitude-dependent and the contribution rate of precipitation with different levels is not significantly correlated with altitude.
