Abstract: The envelope structures of high-rise buildings may be damaged due to localized excessive wind suction or wind pressure. The effects of wind loads on the envelopes of high-rise buildings with identical dimensions under different wind direction angles remain unclear. Through rigid model pressure wind tunnel tests, this study investigates the time history data of surface wind pressure of two high-rise buildings at different relative positions and analyzes the extreme value distribution of wind pressure. The results indicate that the extreme wind pressure values on the envelope structures at a 45° wind direction angle are worthy of attention. In parallel arrangements, the absolute values of wind pressure coefficients at interference positions are generally higher than those of a single building, with an increase of up to 67% at x/b=2. For tandem and staggered arrangements, the absolute values of extreme wind pressure coefficients on the envelope structures generally decrease as the wind direction angle increases. In tandem arrangements, the interference effect is stronger at upstream positions than at downstream positions, showing a significant shielding effect. For staggered arrangements, the interference effect is the strongest at the wind direction angle of 15°, with the greatest increase occurring at o/b=±2. When o/b=2, the wind pressure is increased by 33%.