June Weather in St. Augustine South
St. Augustine South's June 2026 forecast shows daily high temperatures ranging from 87° to 88°, with overnight lows between 75° and 78°. The average high for June is 88° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in St. Augustine South. See also: July | August | September.