Chicago, Illinois – Hazy skies blanketed Chicago and much of northern Illinois Wednesday as wildfire smoke continued to drift across the region, with air quality concerns lingering until winds shift more southerly on Thursday. According to the National Weather Service in Chicago, residents can expect visibility and air quality to gradually improve late in the week, but the bigger concern quickly shifts to heat as afternoon highs soar toward the lower 90s starting Friday.
Heat indices could reach a sweltering 100°F across the area through the weekend, with the worst conditions expected in the city and suburbs during peak afternoon hours. Overnight lows will offer little relief, staying in the upper 60s to mid-70s. Neighborhoods near Lake Michigan may see slightly cooler temperatures, but inland communities will feel the full brunt of the heat. The combination of humidity and smoke may impact outdoor plans, especially for sensitive groups and anyone with respiratory issues.
Travelers should watch for patchy fog overnight into Wednesday morning and remain alert for changing air quality alerts. Limit strenuous activity outdoors, stay hydrated, and check on vulnerable neighbors through the weekend. By Sunday, a chance of thunderstorms could offer some relief, but the heat is expected to linger. Additional weather advisories are possible as conditions evolve.
Five Day Outlook for Chicago, Illinois:
- Wednesday: Hazy, mainly morning. High 85-87°F. Low 64-73°F. Cooler near the lake.
- Thursday: Partly cloudy, smoke easing. High 86-90°F. Low 68-76°F.
- Friday: Mostly sunny, hot. High 88-92°F. Low 69-77°F. Heat index up to 100°F.
- Saturday: Sunny, very hot. High 89-93°F. Low 70-79°F. Peak heat risk.
- Sunday: Partly sunny, chance of PM storms. High 88-92°F. Low 69-78°F.
