Recent National Weather Service guidance points to a mostly cloudy setup with scattered showers and thunderstorms possible through midday, limiting solar insolation and holding the daily maximum near 80°F at Chicago Midway. This keeps the 78–79°F and 80–81°F brackets nearly tied, as traders weigh how much afternoon clearing or storm timing could add or subtract a degree or two from peak readings. Dew points near 70°F and light southerly flow add modest moisture but little additional warming, while model spreads on convective coverage create the narrow uncertainty band around the climatological normal of 83–84°F. Updated radar trends and the 18Z model suite will refine whether the high settles in the upper 70s or pushes into the low 80s before resolution.