**Recent forecasts indicate São Paulo will experience continued warmth on August 31 under a hot, dry air mass, with minimum temperatures most likely in the 19–21°C range before a cold front arrives around September 1.** This setup stems from a persistent warm, dry air mass driving daytime highs of 31–37°C and limiting overnight cooling, while the approaching cold front—bringing rain, stronger winds, and a sharp temperature drop—is expected to reach the region primarily on the 1st. Official and model guidance (including Met Office, European models, and local sources) consistently point to overnight lows near 19–20°C on the 31st, with limited overnight radiative cooling due to the air mass and possible cloud cover. The near-even market split between “27°C or higher” and “17°C or below” reflects genuine forecast uncertainty around the front’s exact timing and any earlier cooling or model divergence on boundary-layer mixing. Historical August minima average near 12°C, but the current anomaly has kept recent nights milder; resolution hinges on updated model runs and monitoring agency briefings in the next 48 hours.