Chicago Weather Forecast: 90s Heat Hits Wednesday, Storms to Follow Later This Week

Tanya Williams
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Chicago Weather Forecast: 90s Heat Hits Wednesday, Storms to Follow Later This Week

CHICAGO — After days of warm-up, Wednesday brings the peak of the heat wave across the Chicagoland area, with highs expected to reach near 90°F and sunshine dominating most of the day, according to CBS2 meteorologists.

However, residents should prepare for shifting weather patterns late Wednesday, as a low-pressure system brings a chance of showers and isolated thunderstorms by nightfall.

The hazy skyline, which has become a familiar sight due to drifting Canadian wildfire smoke, is likely to persist through Thursday.

7-Day Forecast for Chicago Area

Wednesday: Sunny and hot with isolated storm chances late

  • High: 90°F | Low: 65°F

Thursday: Mild cooldown with scattered storm potential

  • High: 81°F | Low: 65°F

Friday: Storms more likely, increased humidity

  • High: 83°F | Low: 65°F

Saturday: Cloudier skies with scattered showers

  • High: 75°F | Low: 59°F

Sunday: Slightly cooler by the lakefront

  • High: 74°F | Low: 62°F

Monday: Isolated thunderstorms possible again

  • High: 82°F | Low: 66°F

Tuesday: Thunderstorm pattern continues

  • High: 85°F | Low: 66°F

Watch for Wildfire Haze and Air Quality Shifts

While temperatures take a dip heading into the weekend, the air quality may continue to fluctuate due to the ongoing impact of Canadian wildfire smoke. Sensitive groups — including children, the elderly, and those with respiratory issues — should monitor local air quality alerts and limit extended outdoor activity during haze-heavy hours.

Meteorologist Albert Ramon, who leads the First Alert Weather Team at CBS2, said the cooldown after Wednesday is tied to a passing system that may also spark scattered rain showers throughout the region starting late Thursday.

What’s Your Weather Go-To in the Heat?
Do you stay indoors, head to the lake, or have tips for managing outdoor plans during smoky skies? Tell us in the comments at ChicagoSuburbanFamily.com.

Tanya Williams

Tanya Williams

Tanya covers positive and people-centered stories from across Chicago. From neighborhood events to inspiring local residents, she focuses on what brings our communities together. Tanya grew up in the city and believes every neighborhood has a story worth telling.

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