The average aide salary at Winona Elem. was $28,395 , which is 23 percent higher than the average salary for this job in Missouri, but 12 percent lower than the national average for this job . Aide salaries at Winona Elem. typically range from $28,500 to $32,750 (25th to 75th percentile). The highest reported aide salary was $38,056. There are 11 employees at Winona Elem. with the job title aide.