The rain falls mostly in heavy downpours from thunderstorms. Thunderstorms develop from the warm and humid air. Even though there is a lot of rain, it is still quite sunny in the southeast during the month of July. The coldest recorded temperature is -34 degrees Fahrenheit in Mt. Mitchell, North Carolina on January 21, 1985. For more climate data, look at the Weather Research Center site.
Climate data is listed for many cities, including temperature and precipitation information.