Will yeast die at 30 degrees F?

No, yeast will not die at a temperature of 30 degrees Fahrenheit (-1 degrees Celsius). While this temperature may inhibit yeast growth, it will not kill the yeast cells. For yeast to die, the temperature must be at or above 140 degrees Fahrenheit (60 degrees Celsius). At 30 degrees Fahrenheit, the yeast cells may enter a dormant state, but they will not die. When the temperature is raised again, the yeast will resume its growth.