Average Weekly Hours of All Employees: Manufacturing in Illinois was 40.80000 Hours per Week in March of 2022, according to the United States Federal Reserve. Historically, Average Weekly Hours of All Employees: Manufacturing in Illinois reached a record high of 42.00000 in December of 2020 and a record low of 38.80000 in April of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Average Weekly Hours of All Employees: Manufacturing in Illinois - last updated from the United States Federal Reserve on March of 2024.