Trader consensus overwhelmingly favors 88-89°F as Dallas's highest temperature on March 20, with market-implied odds at 100%, propelled by the National Weather Service's point forecast of 89°F and convergence across GFS, ECMWF, and European model ensembles averaging 88-89°F under persistent high-pressure ridging and southerly winds. Verified soundings and recent radiosonde data confirm dry, stable air masses conducive to these highs, aligning with climatological norms for late March where daily maxima often peak in the upper 80s during El Niño winters. Realistic challenges include an unforeseen cold frontal passage—preceded by sharpening vorticity aloft—or abrupt cloud cover from upstream convection, though current 00Z model suites show negligible risk below 1%.