Overview

• Highs are expected to reach the upper 80s through Thursday with mid-80s likely on Friday, according to the National Weather Service.
• The forecast calls for dry conditions most of the week, with showers possible Friday and a small chance of storms Friday night.
• Onshore flow from Lake Michigan is expected each afternoon, keeping shoreline temperatures lower than inland readings.
• Day-to-day guidance points to sunny days and mostly clear nights with light east to northeast winds.
• The Sept. 15 outlook extends a late-season warm stretch across the Chicago area with limited precipitation until week’s end.