Recent National Weather Service and model guidance point to a partly to mostly cloudy day with scattered showers and thunderstorms possible, keeping afternoon highs in Chicago most likely in the low to mid-80s°F. These conditions limit surface heating through reduced solar insolation and evaporative cooling from precipitation, while steering flow and boundary-layer moisture help cap peak readings near normal climatological values around 83°F. Ensemble spreads and timing differences in convective development create the tight clustering around the 80–85°F bins, with lower probabilities for extremes reflecting stable model consensus on limited instability and modest warm-air advection. Updated NWS briefings and afternoon model runs tomorrow will refine these thresholds ahead of market resolution.