Dirty eggs may be stored in temperatures of up to 60 degrees F. After an egg is refrigerated egg, it must be kept at that temperature. A cold egg left out at room temperature can sweat, facilitating the growth of bacteria that could contaminate the egg, according to the United Egg Producers association.Refrigerated eggs should not be left out more than two hours..That's why the Centers For Disease Control and Prevention recommend that U.S. consumers keep eggs refrigerated at temperatures of 40 degrees F, in order to prevent illness from bacteria.efrigerated eggs should not be left out more than two hours.. That's why the Centers For Disease Control and Prevention recommend that U.S. consumers keep eggs refrigerated at temperatures of 40 degrees F, in order to prevent illness from bacteria.