What is the highest combustion temperature?

The highest combustion temperatures can vary depending on the fuel and conditions, but generally, combustion of hydrogen in oxygen can reach temperatures around 2,500 to 3,000 degrees Celsius (4,532 to 5,432 degrees Fahrenheit). In specialized applications, such as in rocket engines, combustion temperatures can exceed 3,300 degrees Celsius (6,000 degrees Fahrenheit) when using fuels like liquid hydrogen and liquid oxygen. These extreme temperatures are essential for achieving the thrust needed for space travel.