Forecast consensus from NOAA and regional models supports a daily high near 100°F for Dallas on August 5, aligning with the market's leading 52.5% implied probability on the 100-101°F bin. Persistent subtropical high pressure and light winds favor strong daytime heating under mostly clear skies, pushing temperatures above the early-August climatological average of 96°F. Recent model guidance shows limited spread, with ensemble means clustering in the upper 90s to low 100s, while soil moisture deficits from prior weeks enhance surface warming. Traders weigh the modest chance of afternoon convection or slight wind shifts that could cap readings at 98-99°F (26% odds) or allow a brief push to 102-103°F (16.5%). Updated National Weather Service briefings and afternoon observations will refine these probabilities ahead of resolution.