Current forecast models from sources including CPTEC and international ensembles indicate a maximum temperature in São Paulo on August 8 most likely between 28–29°C, aligning with the market’s close distribution favoring those outcomes. August climatology for the region shows typical highs near 23–25°C during Southern Hemisphere winter, yet recent observations and model runs reflect a warmer anomaly driven by reduced cloud cover, lighter winds, and subsidence under a high-pressure system. Key variables differentiating the 28°C versus 29°C or 30°C scenarios include the precise timing of any afternoon convective development and urban heat-island effects, with ensemble spread remaining modest but sufficient to keep probabilities distributed across the narrow range. Updated model guidance and official INMET briefings expected later today will provide the next resolution-relevant data.