Recent National Weather Service and private model guidance points to a high of 67–69°F in Chicago on October 4 under partly cloudy skies and northwest winds of 5–10 mph, consistent with early-October climatology near 68.5°F. These conditions favor modest daytime heating limited by residual cloud cover and cooler air advection, keeping readings below the 72–75°F range carrying the heaviest market weight. Ensemble spread remains modest given the short lead time, yet subtle differences in boundary-layer mixing and lake-breeze timing could add or subtract a degree or two. Traders appear to assign higher odds to the warmer tail of the distribution, reflecting either lingering model uncertainty or anticipated revisions in the final forecast cycle before resolution.