<p>Analysis of the small-scale spatiotemporal evolution characteristics of particulate matter (PM), especially PM_2.5 and PM₁₀, as well as the influence of meteorological factors is crucial for understanding the mechanisms of large-scale PM formation and transport and further developing precise dust pollution prevention measures. In this study, Zhenjiang Port was analyzed for the first time based on hourly data of PM_2.5 and PM₁₀ concentrations from 15 air quality monitoring stations from January 2019 to December 2020. With respect to the evolution characteristics of the PM_2.5 and PM₁₀ concentrations within the study area, the results revealed the following: (1) Daily averages exhibit varying degrees of standard exceedances, with 13.7% of PM_2.5 data points reaching Level 3 or higher. (2) Spatially, both PM_2.5 and PM₁₀ display patterns of relatively high concentrations in the western areas and relatively low concentrations in the eastern areas. (3) Diurnal fluctuations are relatively stable during the day, with peak values occurring around 06:00 in the morning. (4) PM_2.5 exhibits a prolonged residence time in the atmosphere with evident hysteresis. (5) Concentration and temperature are positively correlated below 6&#xa0;°C but negatively correlated above 6&#xa0;°C. (6) Concentration and relative humidity are positively correlated below 80% and above 90% but negatively correlated at 80–90%. These research findings can provide a theoretical basis for formulating atmospheric pollution prevention and control measures for Zhenjiang Port while also serving as a reference for studying the evolution mechanisms of PM in Zhenjiang city and even larger-scale regions.</p>