The temperature of a crock pot on high can vary depending on the brand and model, but most crock pots have a high temperature 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. However, a post on Reddit suggests that slow cookers all reach the same temperature range, which is around 104-112 degrees Celsius (approximately 219-234 degrees Fahrenheit) .

Its important to note that the temperature of a crock pot on high is not the same as the temperature of an oven set to 300 degrees Fahrenheit. Slow cookers work by using steam to create a seal and essentially concentrate heat by circulating steam in a confined space from the base to top and repeat.

In summary, the temperature of a crock pot on high can vary, but it is generally around 300 degrees Fahrenheit.