The highest monthly temperature in Chongqing reached 41.3℃ in August 2022, and the hot weather lasted for 28 days. Under this high-temperature weather, there was no ozone exceeding standard in Chongqing in August, while the overall temperature in July was lower than that in August, indicating 7 ozone pollution days. This article used observational data and WRF model to analyze this phenomenon and comprehensively explores the relationship between ozone and meteorological conditions in different regions. The results indicate that: (1) The temperature, boundary layer height, and wind speed in August were relatively high, while the relative humidity was relatively low, which may be conducive to the improvement of ozone pollution in August. On the whole, the ozone concentration in Chongqing increased first and then decreased with the increase of air temperature and boundary layer height. When the air temperature was higher than 30°C, the boundary layer height was higher than 1000 m, the relative humidity was lower than 59%, and the wind speed was lower than 6.3 m/s, the ozone concentration and excess rate increased significantly. When the air temperature, boundary layer height, relative humidity and wind speed exceeded 39°C, 2800 m, 59% and 6.3 m/s, respectively, the ozone concentration and excess rate decreased significantly. (2) After the temperature in the main urban area and suburban districts and counties exceeded 38 °C and 37 °C respectively, the increase in ozone concentration became smaller or decreased, and the ozone concentration in individual districts and counties still maintained an upward trend within 38~40 °C. (3) On pollution days, the 2-hours peak of ozone and boundary layer height in Shapingba and Changshou occurred at 11 a.m. or 13 p.m. at the same time. The 2-hours peak amplitude of ozone and boundary layer height in Hechuan and Rongchang districts was inconsistent. This article provides guidance for the prevention and control of summer ozone pollution and the rescue of polluted days in Chongqing.