Recent National Weather Service and ensemble model guidance points to a highest temperature in Dallas on May 17 between 86 °F and 89 °F, with southerly flow drawing warm, moist air from the Gulf of Mexico under partly cloudy skies and light winds. Forecast soundings show surface temperatures peaking near 88 °F by mid-afternoon before any scattered shower activity develops, consistent with mid-May climatology that favors highs in the mid-to-upper 80s when no strong cold front or upper-level trough is present. The tight clustering of market-implied probabilities across the 86–91 °F bins reflects minor differences among model runs in boundary-layer mixing and cloud cover timing, while the low odds on extremes underscore the absence of atypical heat advection or rapid cooling signals in the latest guidance.