Average Weekly Hours of All Employees: Professional and Business Services in Illinois was 36.40000 Hours per Week in January of 2021, according to the United States Federal Reserve. Historically, Average Weekly Hours of All Employees: Professional and Business Services in Illinois reached a record high of 36.80000 in January of 2009 and a record low of 35.30000 in January of 2007. Trading Economics provides the current actual value, an historical data chart and related indicators for Average Weekly Hours of All Employees: Professional and Business Services in Illinois - last updated from the United States Federal Reserve on March of 2024.