Temperature And Pressure(2) Low-grade metamorphism is the result of metamorphic processes that occur at temperatures from about 100oc to 500oC and at relatively low pressures. High-grade metamorphism is the result of metamorphic processes at high temperatures(above 500C), and at high p ressureTemperature And Pressure (2) ◼ Low-grade metamorphism is the result of metamorphic processes that occur at temperatures from about 100oC to 500oC, and at relatively low pressures. ◼ High-grade metamorphism is the result of metamorphic processes at high temperatures (above 500oC), and at high pressure