Chicago, Illinois – Chicago will see a jump in temperatures midweek, but rain and cooler lakefront conditions could bring a shift by Thursday.
According to the National Weather Service in Chicago, highs will reach 86–89°F Wednesday, with a chance of showers developing north of Interstate 80 that night. Rain chances rise into Thursday and Friday, especially near Lake Michigan, where cooler air will push daytime highs down into the mid-70s.
Cities along the lakefront—including Evanston, Waukegan, and downtown Chicago—could feel a noticeable drop in temperatures by Thursday afternoon. Farther inland, areas like Naperville and Joliet will stay warmer longer, but should also brace for scattered storms and brief downpours late Thursday into Friday.
Drivers are urged to plan ahead for wet morning commutes late in the week. Evening events, particularly along the lakeshore, may also be affected by shifting winds and rain bands.
While no widespread flooding is expected, residents should secure outdoor furniture and keep umbrellas handy. The weather service suggests checking updates daily as conditions evolve, especially for those near the lake.
Rain chances persist through Friday, with additional advisories possible depending on storm development.
