Trader sentiment for Shanghai’s August 13 high centers on 29–30 °C because recent Typhoon Dolphin landfall near adjacent Zhejiang on August 9 has left lingering cloud cover, scattered showers, and elevated humidity that suppress peak readings. Official model consensus from regional forecasts shows overcast skies and late-day precipitation moderating daytime maxima to roughly 30–31 °C (about 86–88 °F), consistent with historical August baselines of 30–32 °C when monsoon moisture and post-storm patterns dominate. The narrow spread between 29 °C (32.5 %) and 30 °C (38.0 %) reflects uncertainty in exact cloud timing and any residual steering winds, while lower probabilities for 28 °C or 32 °C+ capture the limited scope for stronger cooling or brief clearing. Updated NHC-aligned runs and local meteorological briefings over the next 48 hours will likely tighten these odds.