The market-implied 100% consensus on an 86-87°F high for Chicago on June 9 reflects official National Weather Service observations from Midway International Airport confirming that peak reading as the daily maximum. This outcome sits well above the 1991-2020 climatological normal of roughly 79°F for the date and aligns with a broader early-June warm surge featuring elevated dew points and southerly flow that supported daytime heating under mostly clear to partly cloudy skies. Model guidance and real-time surface data converged on this narrow range without notable upward or downward revisions, leaving little room for alternative bins. Only an unexpected station measurement discrepancy or post-event quality-control adjustment could realistically alter the result before final resolution.