Illinois Summer Weather Alert: Sunny Skies and 83°F Highs in Chicago Monday, July 14 — Thunderstorm Risk Tuesday Night

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Chicago, Illinois – After a picture-perfect summer Sunday, Chicago’s weather shifts to high heat, rising humidity, and the threat of midweek storms, setting up a week that could impact commuters, outdoor plans, and city infrastructure.

According to the National Weather Service, Monday, July 14 brings abundant sunshine with a high of 83°F across Chicago, while the Dan Ryan Expressway and I-55 will be hot spots for heat and glare. The calm conditions make Monday ideal for travel and outdoor activity, but residents should keep an eye on rapidly changing conditions as the week progresses. By Tuesday, July 15, expect highs near 85°F under sunny skies. A slight chance of afternoon and evening thunderstorms develops after 1 p.m., with showers and possible lightning expected to move into the region by Tuesday night. Flash flooding and traffic slowdowns are possible, especially along major arteries like the Dan Ryan and Stevenson Expressways. Secure outdoor items, charge mobile devices, and be ready for sudden delays or power outages.

Wednesday, July 16, brings more heat with highs around 90°F and an increasing risk for afternoon and evening thunderstorms. Utility crews and emergency managers urge caution for those traveling during heavy downpours, especially during the evening commute. Storm chances linger into Wednesday night and Thursday before drier, slightly cooler air returns to close out the work week.

Looking ahead:
A mix of sun and storm potential continues through Friday, July 18, with daytime highs in the low 80s. Summer heat, humidity, and pop-up storms remain the theme. Stay with local updates, and avoid flooded roads during storms.


Five-Day Forecast for Chicago, IL (July 14–18):

  • Monday: Sunny, high near 83°F. Light winds.
  • Monday Night: Mostly clear, low around 72°F.
  • Tuesday: Sunny early, chance of showers and thunderstorms after 1 p.m., high near 85°F.
  • Tuesday Night: Showers and thunderstorms possible, low around 74°F.
  • Wednesday: Chance of showers/thunderstorms, mostly sunny, high near 90°F.
  • Wednesday Night: Storms possible, mostly cloudy, low near 71°F.
  • Thursday: Slight chance of thunderstorms, partly sunny, high near 78°F.
  • Friday: Mostly sunny, high near 77°F.

Warnings remain in effect for thunderstorms and heavy rain Tuesday night into Wednesday—stay tuned for real-time alerts.