National Weather Service forecasts point to a Monday high near 91°F in Dallas under mostly cloudy skies with a 20 percent chance of afternoon showers and thunderstorms. Southerly winds of 15–20 mph, gusting higher, will advect warm, humid air northward while increasing cloud cover that could limit peak heating. Ensemble guidance from the GFS and ECMWF shows minor spread around this value, reflecting uncertainty in exact storm timing and coverage that might shave a degree or two from the maximum. Historical May averages hover near 85°F, placing the current setup several degrees above normal and aligning with the tight clustering of market-implied odds between 86–91°F. Updated model runs and afternoon observations tomorrow will be the key data points for resolution.