To explore the climatic and non-uniform characteristics of summer (June to August ) precipitation in Bijie City , this article uses the daily precipitation data from eight national meteorological stations in Bijie City from 1961 to 2020 to statistically analyze the spatio-temporal variation characteristics of summer precipitation in the region combining the parameters of precipitation concentration degree (PCD) and concentration period (PCP) . It is found that the average summer precipitation in Bijie City is 526 . 8 mm. The stations with maximum and minimum precipitation amounts are Zhijin Station and Weining Station . The summer precipitation at the stations of Qianxi , Hezhang , Nayong , Dafang , Jinsha and Weining shows a right skewed distribution , while that at Bijie Station and Zhijin Station is in a left skewed distribution . The pentad precipitation of each station has gone through a stage of " rising-falling-flat-falling-rising " , and there are differences in the time period when the pentad precipitation reaches its peak . The correlation analysis of the changes in the amount of pentad rainfall reveals a significant positive correlation among all stations , with Bijie Station having the strongest correlation . The concentration degree of precipitation and the change rate of concentration period indicate that the pentad precipitation is developing in a gradual concentration trend and the maximum pentad precipitation occurs earlier. The general distribution of precipitation in the entire region is uniform , with Zhijin County having the earliest period of maximum pentad precipitation and Hezhang County having the latest. The Morlet wavelet period characteristics show that the first , second , third and fourth main periods of precipitation concentration degree and concentration period are 28 years , 23 years , 14 years , 5 years and 32 years , 16 years , 24 years and 6 years , respectively. Overall , there are significant differences in summer precipitation in different regions of Bijie City , with an overall trend of " more in the south and less in the north , and earlier in the east and later in the west " . The concentration degree and concentration period of summer precipitation only show significant oscillation period changes in the first main period throughout the time domain , while the significant oscillation period changes in the other three main periods are localized .