Official National Weather Service forecasts for Austin on August 4 point to a high near 100–102°F under sunny skies and light southerly winds, consistent with typical late-summer conditions across central Texas amid a broader warmer-than-normal seasonal outlook. Ensemble model guidance shows modest spread due to minor variations in boundary-layer moisture and daytime heating rates, keeping the 98–101°F range dominant while limiting upside risk above 103°F. Historical August maxima average around 96°F, so current conditions reflect elevated but not extreme heat driven by persistent high pressure and minimal cloud cover. Traders appear to weigh these official projections against local microclimate differences at reporting stations, resulting in closely matched probabilities across the 98–101°F bins ahead of the next model update cycle.