Weather
Chicago, IL: 98-degree heat index expected through Wednesday afternoon
Chicago residents face a sweltering Wednesday with heat index values hitting 98 degrees. Follow safety tips to avoid heat related illness during this heat.
By Erin Vale · 2026-09-02T03:39:56.975Z
Chicago, Illinois – Residents should prepare for a sweltering Wednesday as heat index values climb as high as 98 degrees. With temperatures peaking near 93 degrees during the day, individuals are encouraged to limit outdoor activities and remain hydrated to avoid heat related illness during this peak period of summer warmth.
According to the National Weather Service, the heat will persist throughout the day with southwest winds gusting up to 20 mph. The intense conditions are expected to subside by Wednesday night as temperatures drop toward a low near 76 degrees under partly cloudy skies.
Those working or exercising outdoors should take frequent breaks in shaded areas and consume plenty of water. Keep an eye on elderly neighbors and ensure pets have access to cool environments and water. If you must be outside, wear lightweight, loose fitting clothing and monitor your physical condition for signs of heat exhaustion.
Looking ahead, the region will see a shift in weather patterns beginning Thursday. A 20 percent chance of showers and thunderstorms is possible after 10 a.m., providing a slight reprieve from the sustained heat of mid week.
Five Day Summer Summary for Chicago, Illinois: Wednesday features sunny skies with a high of 93. Thursday brings a slight chance of thunderstorms with a high of 90. Friday remains active with a 50 percent chance of storms and a high of 83. Saturday continues the trend with a chance of storms and a high of 84. Sunday concludes the period with a high of 82 and a remaining chance of showers.