The high temperature on a crock pot can vary depending on the model and brand. However, most crock pots have a high temperature setting of around 300 degrees Fahrenheit. According to Crockpot™, slow cookers reach the simmer point and stabilize on both "High" and "Low" at about 209°F. Its important to note that the high setting on a crock pot does not necessarily mean that the food will cook faster. It simply heats the crock faster. The temperature range of a warm setting is between 145 and 165°F, and it is used to keep food warm after cooking.