Tomorrow in Chicago, start your day with a cool 72°F that transitions into a more moderate 75°F with showers. Across the Midwest, experience everything from sizzling temperatures in St. Louis to refreshing breezes in Fort Wayne.

As we examine the upcoming weather scenarios across the Midwest from tomorrow’s partly cloudy dawn in Chicago to a potential severe storm line stretching through Des Moines to Peoria, our comprehensive guide dives into hourly projections, weather phenomena explanations, and practical tips for residents to stay safe and enjoy the varying Midwest climate during this dynamic week.
A significant line of storms is sweeping eastward across the Midwest, with severe weather prominently impacting areas around Des Moines and stretching towards Peoria. St. Louis is experiencing pockets of heavy rain and thunderstorms, while Springfield is seeing the edge of this system. Indianapolis and Bowling Green are set to encounter some moderate showers in the hours ahead. Detroit and Cleveland continue to enjoy clearer conditions with only a few scattered showers near Fort Wayne.
Expect a cool start in Chicago tomorrow morning with temperatures at 72 degrees by 8 AM. Showers are likely, giving way to cloudy skies as temperatures rise to 73 degrees by 10 AM. A gentle northeast wind will prevail, reaching up to 9 miles per hour by noon when temperatures climb to 74 degrees.
Tomorrow, St. Louis is set to sizzle with a lofty high of 97 degrees, making it one of the warmest spots in the Midwest. Kansas City isn’t far behind, reaching 96 degrees, while Springfield will see a high of 95. Indianapolis will experience a warm afternoon, topping out at 85 degrees. Cooler temperatures are found in Chicago, where a high of 75 degrees is expected, and Fort Wayne will see a pleasant 79 degrees.
A cold front sweeps into the Midwest tomorrow, bringing showers and thunderstorms from Des Moines to Louisville. Expect locally heavy downpours and gusty winds, especially around St. Louis and Indianapolis. Cooler air follows, with temperatures dropping by 5 to 10 degrees, offering a brief respite from the summer heat. Chicago and Peoria should prepare for rain in the afternoon, easing by evening.
The UV index in Chicago will stay at a moderate level of 4 through Saturday and Sunday, with a burn time of approximately 35 minutes under direct sunlight. While sun protection is advisable, the risk is moderate, so remember sunscreen and a hat if you’re outdoors!
For the 7-day outlook in Chicago: Saturday: Cloudy skies with a high of 83 degrees and a low of 70 degrees. Sunday: Partly cloudy with the temperature peaking at 74 degrees and cooling down to 68 degrees at night. Monday: Partly cloudy again with a high reaching 80 degrees and an overnight low of 69 degrees. Tuesday: Enjoy partly cloudy conditions with a high of 86 degrees and a low of 72 degrees. Wednesday: Clear skies and sunny, with temperatures climbing to 93 degrees during the day and a low of 77 degrees. Thursday: Scattered thunderstorms developing with the temperature reaching 95 degrees and a low of 75 degrees. Friday: More scattered thunderstorms to end the week, with a high of 86 degrees and a low of 73 degrees.