**Forecast consensus points to a peak temperature near 32–33°C in Guangzhou on September 13, 2026, with trader-implied probabilities clustered tightly around those levels due to model spread and precipitation timing.** Current guidance from multiple sources shows daytime highs of 31–33°C (roughly 87–91°F) under partly cloudy skies with an 80%+ chance of thunderstorms, especially in the afternoon. This aligns with the late-summer subtropical pattern in the Pearl River Delta, where high humidity, weak steering flow, and abundant moisture support scattered convection that can cap temperatures through cloud shading or briefly boost them via downburst mixing. Historical averages for the date sit near 32.2°C, providing a baseline, while recent model runs show minor disagreements on exact peak timing and storm coverage that keep 32°C, 33°C, and 34°C outcomes closely matched in the market. Key differentiating factors include the precise hour of maximum heating before storms develop, boundary-layer moisture, and any shifts in the east-northeasterly flow. Updated short-range model guidance and official observations from Chinese meteorological services over the next 12–24 hours will likely resolve much of the remaining uncertainty before resolution.