The average aide salary at Winfield High was $34,286 , which is 48 percent higher than the average salary for this job in Missouri, and 6 percent higher than the national average for this job . Aide salaries at Winfield High typically range from $23,467 to $43,250 (25th to 75th percentile). The highest reported aide salary was $53,883. There are 7 employees at Winfield High with the job title aide.