Recent National Weather Service and ensemble model guidance point to daytime highs near Chicago's July normal of 84–85°F on July 7, after the early-month heat wave, with scattered clouds and a possible lake breeze moderating peak readings. This produces the tight market split favoring the 82–83°F and 84–85°F bins at 30.0% and 28.5% implied probability, respectively, while lower and higher outcomes reflect uncertainty in exact timing of any frontal passage or onshore flow. Official highs are measured at Midway Airport, where small shifts in wind direction or insolation can move the daily maximum across bin boundaries. Updated model runs and afternoon observations tomorrow will likely drive final resolution.