Trader consensus on Polymarket fully prices in a highest temperature of 56°F or higher at Chicago O'Hare International Airport on May 14, driven by National Weather Service observations showing air temperatures already reaching 61°F by late morning under clear skies and light west-northwest winds. This follows a cool early May pattern with prior highs in the mid-50s, but a building ridge of high pressure has spurred rapid warming, aligning with the 70°F climatological normal for mid-May. Model ensembles from NOAA consistently projected highs near 60°F, with ample solar heating and no disruptive fronts. Realistic challenges are negligible post-noon, barring rare official data revisions, as daily maxima rarely dip below 50°F historically in May. Hourly updates from NWS will finalize the record.