Based on the wind measurement comparison test data of four types of short-range wind radars and wind towers carried out in Qianjiang, Hubei Province, from November 2024 to June 2025, combined with the precipitation data of the same period at the provincial meteorological station，the wind direction frequency and wind direction sector distribution characteristics of the wind radar and the wind tower were analyzed by using the 16-sector division method, and the effects of precipitation intensities and different wind speed changes on the wind direction angle detection quality of the wind radar at different altitudes were studied. In order to evaluate the data integrity, accuracy and dispersion as evaluation factors, and to formulate 4-level discrimination criteria according to relevant standards and actual situations, the wind direction detection performance and difference of different radars under different weather were evaluated. The results show that the data integrity of the wind direction detected by the wind radar is excellent in the whole period and in the non-precipitation period, and is slightly reduced in the precipitation period. The distribution of the wind direction frequency at different altitudes of the wind radar is similar to that of the wind tower, and the correlation coefficients all above 98%. Precipitation and wind speed can affect the accuracy of the wind measurement data of the wind radar, and the wind measurement error of the wind radar a decreasing trend with the increase of the wind speed and an increasing trend with the increase of the precipitation intensity. Overall, the wind direction of the four wind radars is less different that of the wind tower, and extreme weather has a certain effect on the detection quality of the wind direction, and other weather has little effect on the detection quality of the wind except for a few complex extreme weather.