How much does an Assoc. Professor - Geological Sciences make in Washington? The average Assoc. Professor - Geological Sciences salary in Washington is $85,765 as of November 25, 2019, but the range typically falls between $71,514 and $114,603. Salary ranges can vary widely depending on the city and many other important factors, including education, certifications, additional skills, the number of years you have spent in your profession.