The average aide salary at St. Clair High was $33,027 , which is 43 percent higher than the average salary for this job in Missouri, and 2 percent higher than the national average for this job . Aide salaries at St. Clair High typically range from $28,936 to $34,642 (25th to 75th percentile). The highest reported aide salary was $43,999. There are 6 employees at St. Clair High with the job title aide.